96-12954. Transportation of Hazardous Materials by Rail; Miscellaneous Amendments  

  • [Federal Register Volume 61, Number 109 (Wednesday, June 5, 1996)]
    [Rules and Regulations]
    [Pages 28666-28682]
    From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
    [FR Doc No: 96-12954]
    
    
    
    
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    Part III
    
    
    
    
    
    Department of Transportation
    
    
    
    
    
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    Research and Special Programs Administration
    
    
    
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    49 CFR Part 171, et al.
    
    
    
    Transportation of Hazardous Materials by Rail; Miscellaneous 
    Amendments; Final Rule
    
    Federal Register / Vol. 61, No. 109 / Wednesday, June 5, 1996 / Rules 
    and Regulations
    
    [[Page 28666]]
    
    
    
    DEPARTMENT OF TRANSPORTATION
    
    Research and Special Programs Administration
    
    49 CFR Parts 171, 172, 173, 174, 178, and 179
    
    [Docket No. HM-216; Amdt Nos. 171-144, 172-148, 173-252, 174-83, 178-
    115, 179-52]
    RIN 2137-AC66
    
    
    Transportation of Hazardous Materials by Rail; Miscellaneous 
    Amendments
    
    AGENCY: Research and Special Programs Administration (RSPA), DOT.
    
    ACTION: Final rule.
    
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    SUMMARY: This final rule amends the Department's Hazardous Materials 
    Regulations (HMR) to incorporate a number of changes to rail 
    requirements based on rulemaking petitions from industry and RSPA 
    initiatives. This action is necessary to update the regulations and to 
    respond to petitions for rulemaking. The intended effect of these 
    regulatory changes is to improve safety and reduce costs to offerors 
    and transporters of hazardous materials.
    
    DATES: Effective date: The effective date of these amendments is 
    October 1, 1996.
        Compliance date: Voluntary compliance with the regulations, as 
    amended herein, is authorized June 30, 1996.
        Incorporation by reference: The incorporation by reference of 
    certain publications listed in these amendments has been approved by 
    the Director of the Federal Register as of October 1, 1996.
    
    FOR FURTHER INFORMATION CONTACT: Beth Romo, telephone (202) 366-8553, 
    Office of Hazardous Materials Standards, Research and Special Programs 
    Administration, Washington DC, 20590-0001, or James H. Rader, telephone 
    (202) 366-0510, Office of Safety Assurance and Compliance, Federal 
    Railroad Administration, Washington DC, 20590-0001.
    
    SUPPLEMENTARY INFORMATION:
    
    I. Background
    
        On December 19, 1995, RSPA issued a notice of proposed rulemaking 
    (NPRM) under Docket HM-216 [60 FR 65492]. The NPRM proposed 
    miscellaneous changes to rail requirements contained in the HMR, based 
    on petitions for rulemaking submitted in accordance with 49 CFR 106.31 
    or agency initiative.
        RSPA received 22 comments in response to the proposed rule. 
    Comments were submitted by chemical manufacturing companies, trade 
    associations, emergency response organizations, and rail carriers. 
    Commenters were uniformly supportive of RSPA's and FRA's efforts to 
    respond to petitions for rulemaking and to reduce regulatory burdens by 
    simplifying or updating existing regulations. Several commenters 
    suggested other amendments to the HMR as part of this initiative. These 
    suggestions are incorporated into this final rule where possible, but 
    many are beyond the scope of the rule and should be proposed in a 
    future rulemaking action to ensure adequate opportunity for public 
    notice and comment.
        This rule is consistent with the goals of President Clinton's 
    Regulatory Reinvention Initiative. The President directed Federal 
    agencies to review all agency regulations and eliminate or revise those 
    that are outdated or in need of reform. A notice issued April 4, 1995 
    by RSPA requested comments on regulatory reform (Docket HM-222; 60 FR 
    17049) and announced a comprehensive review of the HMR to identify 
    provisions that are candidates for elimination, revision, 
    clarification, or relaxation. Certain changes in this document reflect 
    the results of this review.
    
    II. Summary of Regulatory Changes by Section
    
        Listed below is a section-by-section summary of changes and, where 
    applicable, the assigned petition number.
    
    Part 171
    
    Section 171.7
    
        Various American Society for Testing and Materials (ASTM) standards 
    are updated to reflect the most current version. Other ASTM standards 
    that no longer would be referenced in revised Sec. 179.12 are removed. 
    In the NPRM, RSPA did not propose any changes to ASTM A 285 and 
    proposed an update to ASTM A 515; however, because these standards are 
    no longer applicable, they are removed in this final rule.
    
    Part 172
    
    Section 172.101; The Hazardous Materials Table
    
        Several entries in the Hazardous Materials Table are revised as 
    proposed. For the entry ``Dimethylhydrazine, unsymmetrical'', assigned 
    Special Provisions B74 and B79, Special Provision B79 is removed. 
    Special Provision B74 requires the use of a tank car conforming to a 
    Class 105S, 106, 110, 112J, or 114J. Special Provision B79 requires 
    each tank car to have a tank head puncture system if the tank was 
    constructed prior to April 1, 1989. Because Special Provision B74 
    requires all tank cars to meet the requirements of B79, referencing 
    Special Provision B79 is unnecessary. For the entry for Calcium 
    carbide, Special Provision B59 is added for both Packing Group I and II 
    entries. This special provision will authorize the continued use of 
    Class AAR 207 tank cars for the transportation of calcium carbide after 
    October 1, 1996.
    
    Sections 172.101 (The Hazardous Materials Table) and 172.330
    
        In the Hazardous Materials Table, RSPA proposed to revise 29 
    entries by removing Special Provision B12 assigned to those entries in 
    Column (7). This special provision requires the marking of tank cars 
    with the proper shipping name or common name of the material. As part 
    of the proposal to provide relief from this marking requirement, RSPA 
    proposed to consolidate marking requirements currently contained in 
    Sec. 172.102 special provisions and in Parts 173 and 179 into 
    Sec. 172.330 and limit its applicability to certain materials which 
    pose very high risks in transportation. RSPA proposed in the NPRM that 
    the requirement to mark the proper shipping name or common name of a 
    hazardous material on a tank car be limited to: Division 2.1 and 2.3 
    materials; Division 2.2 materials in Class DOT 107 tank cars; anhydrous 
    ammonia; ammonia solutions with more than 50% ammonia; bromine and 
    bromine solutions; hydrogen cyanide; chloroprene; and refrigerant or 
    dispersant gases, as defined in Sec. 173.115. A majority of commenters 
    supported this proposal, but several suggested that other commodities 
    should be considered for inclusion in the proposed list of commodities 
    requiring marking. Two emergency response organizations, the 
    International Association of Fire Fighters (IAFF) and the International 
    Association of Fire Chiefs (IAFC), strongly opposed elimination of the 
    marking requirement. The IAFF claimed that fewer cars would have 
    information providing instant confirmation of the contents, thereby 
    delaying rescue actions while shipping papers are researched. The IAFC 
    agreed, stating that the inability to promptly identify contents of a 
    car involved in an incident or accident would increase the hazard to 
    fire and emergency service responders. Very little cost or effort is 
    involved to stencil the product or proper shipping name on the car, the 
    IAFC added. One chemical manufacturer questioned the safety rationale 
    of removing this requirement and stated that use of a proper shipping 
    name is preferable for loaders/unloaders, repair and cleaning
    
    [[Page 28667]]
    
    facility personnel, and emergency responders, rather than depending 
    only on the four-digit identification number. Based on views expressed 
    by emergency response organizations and after careful consideration of 
    all comments on this issue, RSPA and FRA have decided to retain the 
    requirement for marking tank cars with the proper shipping name for all 
    commodities currently assigned B12, but to move these requirements to 
    Sec. 172.330. Accordingly, this rule provides a list of these 
    commodities in Sec. 172.330(a)(1). RSPA and FRA believe that a future 
    revision of this list may be warranted because certain high hazard 
    materials currently are not subject to this marking requirement, while 
    other hazardous materials posing less risk appear on the list. 
    Interested readers are invited to submit suggestions as to what proper 
    shipping names should be removed, retained or added to the list.
    
    Section 172.102
    
        Special Provisions B4 and B10 are revised as proposed to remove a 
    prohibition on the use of Association of American Railroads (AAR) 206 
    tank cars. In the Sec. 172.101 Hazardous Materials Table (HMT), each 
    commodity assigned this special provision must be in a packaging 
    authorized in Sec. 173.243, which does not allow an AAR 206 tank car. 
    Special Provision B5 is revised as proposed to authorize use of tank 
    cars, constructed from other than aluminum plate, for ammonium nitrate 
    fertilizer. Special Provision B12 is removed, as discussed above.
        Changes to Special Provisions B42, B65, B71, B72, B74, and B76 are 
    adopted as proposed. These provisions are revised to clarify that any 
    class tank car with a higher test pressure than authorized also may be 
    used. Special Provisions B42, B65, and B76 also are revised to 
    authorize the optional marking of the tank to a lower pressure 
    specification. All but one commenter addressing this issue supported 
    the proposed change. Commenters agreed that the proposed option allows 
    flexibility for safety valve settings for certain classes of pressure 
    cars and allows the originally designed tank pressure to also remain 
    marked on the car. One commenter believed that confusion would arise if 
    there is an option to mark the tank with either the tank test pressure 
    rating or a lower pressure rating, required to coincide with the 
    pressure relief device start-to-discharge pressure. RSPA and FRA do not 
    believe that either the current requirement or the new option will 
    cause confusion. The option adopted in this final rule simply removes 
    the mandatory link between marked test pressure and the safety valve 
    start-to-discharge settings.
        RSPA is removing a requirement in Special Provision B57 that the 
    shipping name CHLOROPRENE must be marked on a tank car. This marking 
    requirement is included in the revision of Sec. 172.330(a)(1). Based on 
    a comment, RSPA is revising Special Provision B57 to specify a safety 
    vent with a minimum diameter of 305 mm (12 inches) with a rupture disc 
    pressure of not more than 45 psi. RSPA also is revising the first 
    sentence of Special Provision B78 to specify the test pressure and to 
    clarify which rail cars are authorized.
        As pointed out by a commenter, RSPA proposed the addition of a new 
    class DOT 120A, but overlooked the need to add corresponding special 
    provisions. Therefore, authorizations for use of Class DOT 120A tank 
    car tanks are added to Special Provisions B71, B74, B76, and B78.
    
    Section 172.203
    
        Currently, rail carrier shipping paper requirements are contained 
    in both Parts 172 and 174. In this final rule, RSPA is moving the 
    shipping paper requirements in Part 174 to Part 172. Commenters 
    supported the consolidation of shipping paper requirements in Part 172. 
    Paragraph (e)(2) is revised as proposed to replace references with a 
    specific requirement to precede the basic shipping description with the 
    wording ``RESIDUE, LAST CONTAINED.'' Paragraph (g)(1) also is revised 
    to adopt a requirement to identify a rail car, freight container, 
    transport vehicle, or portable tank that contains a hazardous material 
    by reporting mark and number. Several commenters requested that RSPA 
    clarify in the final rule that annotating a reporting mark and number 
    on a shipping paper applies only to those shipments which are assigned 
    reporting marks. RSPA agrees and is limiting this requirement to those 
    rail cars, transport vehicles, freight containers and portable tanks 
    displaying a reporting mark.
    
    Section 172.205
    
        This section is revised as proposed. RSPA received unanimous 
    support for its proposal to revise paragraph (f) for consistency with 
    Environmental Protection Agency (EPA) hazardous waste manifest 
    requirements for transportation by rail contained in 40 CFR 263.20(f).
    
    Section 172.330
    
        Paragraph (a)(1) is revised to clarify marking requirements for 
    tank cars. See preamble discussion under Secs. 172.101 and 172.330.
    
    Section 172.510
    
        Paragraph (a) is revised to require the placement of each placard 
    on a white square background on each class DOT 113 tank car used to 
    transport a Division 2.1 (flammable gas) material. This change will 
    enhance compliance with switching requirements for rail cars by 
    communicating to railroad switching crews, through a white square 
    background, that a class DOT 113 tank car transporting a Division 2.1 
    material may not be cut off while in motion. (See Sec. 174.83(b).) 
    Commenters generally supported this proposed change; however, one rail 
    carrier opposed it, claiming that such placards require special 
    attention and imposing the requirement on class DOT 113 tank cars 
    containing flammable gas would dilute the meaning of the square white 
    background and be more confusing than helpful. RSPA does not agree and 
    believes a white square background will more effectively communicate to 
    rail crews the presence of flammable gases, such as liquid hydrogen.
        Several commenters pointed out an unintended change in wording 
    which would broaden the requirement for a placard with a square white 
    background to all Hazard Zone A materials, including those in a class 
    or division other than Division 2.3 or Division 6.1. RSPA is revising 
    the proposed wording to limit the requirement for a placard on a square 
    white background to Hazard Zone A materials in Divisions 2.3 and 6.1. 
    However, after reviewing these comments, RSPA believes this requirement 
    should be broadened to apply to all Hazard Zone A materials (with 
    corresponding changes in Sec. 174.83) and may propose such a change in 
    a future rulemaking action.
    
    Sections 172.510 and 172.526
    
        The NPRM proposed the removal of provisions for the specifications 
    for and use of RESIDUE placards. The majority of commenters to this 
    issue supported RSPA's and FRA's proposal to eliminate these 
    requirements. These commenters cited standardization among all 
    transportation modes, enhanced regulatory understanding and compliance, 
    and harmonization with NAFTA and international regulations. One 
    chemical manufacturer noted that its emergency response personnel were 
    not aware of any incident where the RESIDUE placard has made a 
    difference in the outcome of the incident. This commenter maintained 
    that eliminating this placard would result in considerable savings to 
    the company.
    
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    Several other commenters, including the Chemical Manufacturers 
    Association, believed that the determination of what constitutes 
    ``residue'' is arbitrary and stated that some residue tank cars could 
    have a significant amount of product remaining in the tank. One rail 
    carrier indicated that a common deficiency is the failure of an offeror 
    to completely reverse all placards applied to a tank car. Thus, loaded 
    tank cars will often have a RESIDUE placard as one of the four placards 
    displayed, or conversely, residue tank cars will still have the 
    original loaded placard in one of the holders.
        Only four commenters--the IAFC, two chemical manufacturers and a 
    government safety inspector--opposed removing the requirement for the 
    use of a RESIDUE placard. The IAFC believed the information is crucial 
    to fire and emergency responders because it communicates whether a tank 
    car is full or just has residue left in the tank. The IAFC claimed the 
    22,000 occasions cited in the NPRM were due to poor compliance and 
    inadequate enforcement. The commenter further stated that eliminating 
    the RESIDUE placard may significantly increase the hazard or risk to 
    fire or emergency response personnel. Not knowing the amount of product 
    in a car will force responders to treat all tank cars as if they were 
    full, which may result in unnecessary and potentially expensive 
    actions.
        RSPA and FRA disagree with the opinion expressed by IAFC that the 
    22,000 occasions cited in the NPRM were due both to poor compliance and 
    inadequate enforcement since they were discovered as a result of FRA's 
    enforcement efforts. As noted by one commenter, RSPA and FRA are aware 
    of many ``residue'' tank cars which have remaining product that may 
    contain as much as 1,000 gallons or more of hazardous material. 
    Moreover, FRA has discovered that some shipments of liquefied 
    compressed gases in pressure tank cars that are unloaded through 
    equalization of pressure retain as much as one-third of the original 
    load. In a fire, a partially-filled tank car can rupture as violently 
    as a full tank car, thereby presenting a similar hazard to emergency 
    responders. In fact, a partially-filled tank car exposed to fire in 
    some circumstances may rupture in less time than a full tank car, 
    because a partially-filled tank car has less thermal mass. Clearly, a 
    residue placard may lead to a false sense of security. Further, RSPA 
    and FRA believe that the primary purpose of placards is to convey the 
    presence of a hazardous material, a ``trigger'' to emergency response 
    personnel that more needs to be known about the contents of bulk 
    packages of hazardous materials before entering a potential danger 
    zone. By obtaining a copy of the shipping papers or freight car 
    movement documents, emergency response personnel will gain basic 
    information on the hazards present and the shipper's emergency response 
    telephone number, resulting in better informed decisions about any 
    precautions or evacuation measures needed to secure the incident site. 
    One chemical manufacturer expressed concern that the removal of the 
    residue placard will mandate the use of permanent pressure-sensitive 
    placards to general service rail tank cars and, where the commodities 
    change frequently, increase the possibility of misidentification of the 
    commodity being transported. Nothing in the proposed rule would require 
    the use of pressure-sensitive placards. Shippers and carriers may 
    continue to use ``tag board'' placards placed within placard holders. 
    Based on consideration of all comments received, RSPA is removing all 
    provisions applying to the specifications for and use of RESIDUE 
    placards.
    
    Part 173
    
    Section 173.24b
    
        Commenters uniformly supported this proposal to add a mid-range 
    temperature for calculating outage and filling limits for certain 
    thermally protected and jacketed tank cars. This proposal was based on 
    a petition for rulemaking submitted by the Propane Gas Association of 
    Canada [P-1251] in cooperation with Transport Canada. Paragraph (a) of 
    the proposed rule included provisions for anhydrous ammonia currently 
    contained in Note 2 following the Sec. 173.314(c) table. In this final 
    rule, RSPA is adopting a mid-range temperature calculation for 
    anhydrous ammonia by revising Note 2 of the Sec. 173.314(c) table.
    
    Section 173.29
    
        Paragraph (f) is removed, consistent with the removal of 
    Sec. 172.510(c).
    
    Sections 173.240 through 173.244
    
        RSPA is adding an authorization for the use of Class 120A tank car 
    tanks in each of these sections.
    
    Section 173.314
    
        Paragraph (b)(5), which contains provisions for marking the proper 
    shipping name of certain Class 2 materials on tank cars, is removed 
    because these provisions also appear in Sec. 172.330. Paragraph (b)(6) 
    is redesignated (b)(5) and amended to revise requirements for heat-
    resistant gaskets. Commenters expressed concern as to the difficulty of 
    obtaining suitable heat-resistant materials because of the scarcity of 
    materials (other than asbestos) that are capable of withstanding 
    temperatures of 230 deg.C that are also compatible with the lading. 
    Besides temperature and compatibility, the selection of a proper gasket 
    must include consideration of many factors, such as the mating of the 
    gasket to its seating surfaces, fluid media, operating pressure, flange 
    design, bolting data, and size. RSPA and FRA agree with those comments 
    that, because of numerous factors involved, criteria for the selection 
    of a suitable gasket material is too technically complex for resolution 
    at this time. Therefore, this final rule does not define a minimum 
    temperature for heat-resistant gaskets, but identifies criteria which a 
    shipper must consider in selecting a proper gasket. In addition, in 
    analyzing comments to this section, RSPA and FRA discovered that when 
    this provision was moved from Sec. 179.102-3(a)(3) to Sec. 173.314 
    under changes adopted in Docket HM-181, certain words were 
    inadvertently removed. RSPA is restoring this wording to refer to 
    ``gaskets for manway cover plates.''
        In the paragraph (c) table, several entries are amended to add an 
    authorization for use of a Class DOT 120A tank car tank.
        RSPA also is authorizing Class DOT 112J and 112T specification tank 
    cars for the transportation of dimethyl ether, as proposed. Currently, 
    only the use of a DOT 105A300W tank car is authorized. This is based on 
    an exemption issued to Aeropres Corporation (DOT-E 11000) and a 
    petition for rulemaking [P-1253].
        RSPA also is revising Note 2 in paragraph (c) of the table. This 
    note is assigned to the entry ``Ammonia, anhydrous or ammonia solutions 
    >50 percent ammonia'' and the revision will allow shippers to calculate 
    outage and filling limits for tank cars based on corresponding changes 
    adopted in Sec. 173.24b.
        In addition, RSPA is removing paragraph (i), which currently 
    provides alternate settings for safety relief valves on tank car tanks 
    used for certain commodities, because pressure relief device 
    requirements are being consolidated in Sec. 179.15.
    
    Part 174
    
    Section 174.3
    
        This section prohibits a shipment of a hazardous material not 
    prepared in accordance with Parts 171, 172, and 173
    
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    from being offered for transportation or transported by rail. The 
    section is revised as proposed to be consistent with language contained 
    in Parts 175, 176 and 177 for unacceptable hazardous materials 
    shipments.
    
    Section 174.8 through 174.10
    
        Inspection requirements currently contained in Secs. 174.8, 174.9 
    and 174.10 are consolidated into Sec. 174.9 to clarify a railroad's 
    inspection duties at points of origination, interchange points and 
    other locations where rail cars must be inspected. Sections 174.8 and 
    174.10 are removed. Section 174.9 requires a railroad to inspect each 
    rail car for compliance with the HMR and other conditions that may make 
    the car unsafe for transportation.
        The final rule further clarifies that a railroad employee may 
    perform inspections at ``ground level.'' One commenter, a chemical 
    manufacturer, opposed this proposed change because inspections would be 
    limited to leaks detectable at ground level. Another commenter 
    representing a chemical manufacturing company recognized the 
    practicality of ground level inspections, and believed that shippers 
    and carriers must work together to ensure proper securement and 
    compliance with hazard communication standards. A commenter supporting 
    this revision noted that requirements for above ground inspections 
    raise substantial safety concerns, are extremely burdensome, and 
    significantly impair efficiency. RSPA and FRA believe that ground level 
    inspections provide an adequate level of safety and this provision is 
    adopted with an editorial revision to clarify provisions for train crew 
    inspection.
    
    Section 174.11
    
        Section 174.11 is removed as proposed because it merely references 
    Sec. 171.12a for transportation of Canadian shipments or packagings by 
    rail car within the U.S.
    
    Section 174.18
    
        Section 174.18 concerning the handling of astray packages of 
    hazardous materials is obsolete; therefore this section is removed as 
    proposed.
    
    Section 174.24
    
        Shipping paper requirements for rail carriers in Part 174 are moved 
    to Part 172. Revised Sec. 174.24 cross-references shipping paper 
    requirements in Part 172. One commenter expressed concern that the 
    proposed wording of this section would allow origin carriers to accept 
    hazardous materials without first receiving shipping papers. The 
    commenter believed that documentation shows the offer and acceptance 
    affiliation between shipper and carrier and proves that a shipper 
    offered hazardous material for transportation prior to acceptance by a 
    carrier. RSPA agrees that the wording in this section should be revised 
    to clarify that a carrier may not accept or transport a hazardous 
    material by rail unless the carrier receives a properly prepared 
    shipping document from the shipper.
        Numerous commenters urged RSPA to address electronic transmission 
    of a shipper certification. Commenters claimed that adopting a 
    provision in Sec. 172.204 to recognize electronic data interchange 
    (EDI) or other electronic transmission of shipping paper certifications 
    could eliminate the need for an existing exemption, DOT-E-7616. RSPA 
    and FRA agree with commenters that this issue should be addressed, but 
    believe that adopting new certification provisions for electronic 
    transmissions is beyond the scope of this final rule.
    
    Section 174.25
    
        RSPA is removing the ``placard notation'' requirement since it is 
    outdated for emergency response communication. RSPA also is removing 
    the requirement for a ``placard endorsement'' placed on a waybill near 
    the reporting mark of each rail car, freight container, transport 
    vehicle, or portable tank that contains a hazardous material when 
    transported by rail. Commenters supporting these proposals cited 
    improved hazard communication requirements and technological 
    advancements as reasons to eliminate these outdated provisions. The 
    only commenter to oppose these proposals, IAFF, claimed that a placard 
    notation ``allows the company officer to instantly make an initial 
    diagnosis regarding a `go/no go' decision for imminent rescue'' and ``* 
    * * offers a point of quick confirmation of the basic hazard.'' IAFF 
    further noted that ``* * * removing the placard endorsement cripples 
    the ability of the incident commander to make quick and correct 
    decisions when life safety is at stake.'' RSPA and FRA disagree with 
    IAFF. Hazard communication requirements in the HMR (e.g., proper 
    shipping name, hazard class, identification number, packing group and 
    emergency response information) are the principal tools that emergency 
    response personnel should use to assess the emergency. Because the 
    current placard notation is repetitive of other hazard communication 
    requirements and generally restates the hazard class of the material, 
    it is considered unnecessary for making a ``go/no go'' decision. 
    Removing this requirement also makes requirements for railroad 
    transportation consistent with other modes. Accordingly, this final 
    rule removes requirements for the placard notation and endorsement.
        Other shipping paper requirements in this section, including those 
    for tank cars containing the residue of a hazardous material, are 
    removed or moved to Part 172.
    
    Section 174.26
    
        Amendments to this section are adopted as proposed. Paragraph (a) 
    is removed because, if a carrier complies with paragraph (b), the 
    carrier also is complying with paragraph (a). Paragraphs (b) and (c) 
    are redesignated paragraphs (a) and (b), respectively. Newly designated 
    paragraph (b) is revised to reference shipping paper requirements of 
    Part 172 and specify use of other forms of car movement documents.
    
    Sections 174.47 and 174.48
    
        As proposed, the provisions in these sections are consolidated into 
    revised Sec. 174.50 to prescribe requirements for forwarding shipments 
    in violation of the HMR and damaged or leaking packages.
    
    Section 174.49
    
        This section is removed as proposed because open-flame lanterns are 
    no longer used.
    
    Section 174.50
    
        This section is revised by consolidating requirements of 
    Secs. 174.47, 174.48, and 174.50 and by removing all obsolete 
    provisions. As proposed, packages other than tank cars would have to be 
    repaired, reconditioned, or overpacked prior to subsequent movement. 
    Tank cars would have to be repaired or be moved under conditions 
    approved by FRA's Associate Administrator for Safety.
        RSPA and FRA have recently learned that at least one business 
    entity has interpreted existing Sec. 174.47(b) to permit the ongoing 
    movement of noncomplying tank cars once their ``in-violation'' status 
    was reported. Neither FRA nor RSPA agree with this interpretation. Both 
    agencies believe that the HMR have, even before these amendments, 
    clearly prohibited such movement. FRA has consistently taken 
    enforcement action against the movement of tank cars that are in 
    violation of the HMR. The amendment removes any doubt that the old 
    language might have created on the part of one shipper, and provides a 
    method for relief where repairs cannot be made without further 
    movement. For instance,
    
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    a tank car found en route with missing placards or markings is 
    typically ``repaired'' by corrective action on the spot. In more 
    serious situations, it may not be possible to conduct an on-site 
    repair, such as repair of a tank car with its thermal protection system 
    torn or abraded so that it no longer meets a specification. A tank car 
    in this condition may only be moved under the authority of an 
    exemption.
        Commenters generally believed the proposed changes will promote 
    safety, simplify the process, and enable the shipper or carrier to take 
    quicker action. Several commenters recommended that the proposed 
    section be modified to authorize use of a telephone, fax, or electronic 
    mail for notification and FRA approval, with written confirmation to be 
    provided within a specified number of days. RSPA and FRA agree with 
    this recommendation and are revising the section accordingly.
        The Iowa Department of Transportation asked RSPA to expand the 
    proposed provision which would allow a leaking tank car to be switched 
    to ``a location distant from habitation and highways'' to include 
    ``streams'' and ``pipelines within the railroad rights of way.'' The 
    Iowa DOT cited a National Transportation Safety Board report on 
    activities within railroad rights of way that may disturb pipelines. 
    This commenter expressed concern that corrosives or other chemicals 
    could pose either an immediate risk or a long-term effect on pipelines 
    that would not be readily apparent, with corresponding potential 
    effects on water quality and the environment. RSPA and FRA agree in 
    principle with the commenter, and this final rule is broadened, not 
    just to include streams or pipelines within railroad rights of way, but 
    to authorize limited movement of a leaking tank car to reduce or 
    eliminate any immediate risk to human health or the environment.
    
    Section 174.55
    
        Proposed changes to this section were intended to clarify and 
    streamline requirements for loading and securing packages of hazardous 
    materials. Of the 22 comments submitted in response to the NPRM, only 
    three commenters suggested changes to the proposed revision of this 
    section. One commenter noted that lading securement requirements should 
    apply to both ``transport vehicles'' (as stated in the NPRM) and 
    ``freight containers'' (as provided in the current regulations). RSPA 
    agrees, and the final rule reflects this change.
        The NPRM contained a proposal to streamline requirements by 
    eliminating the need to seek DOT approval for lading restraint systems 
    that permit ``limited movement.'' RSPA and FRA believe it is not the 
    slight movement of hazardous materials packages that creates a safety 
    hazard, but their unsecured movement.
        All three commenters believed the proposed requirement that lading 
    ``be secured'' was too vague; two favored a return to the term 
    ``blocked and braced'' and the other suggested requiring ``lading 
    restraint systems.'' While RSPA and FRA do not agree that the proposal 
    was too vague, RSPA is replacing the word ``secured'' in proposed 
    Sec. 174.55(a) with language requiring that a package containing a 
    hazardous material must be loaded in the transport vehicle or freight 
    container so that it cannot fall and must be safeguarded in such a 
    manner that other freight cannot fall onto or slide into it. This is a 
    performance standard which acknowledges that all packages in a vehicle 
    or container may move to a limited degree during transportation without 
    adversely affecting their structural and containment integrity.
        The performance standard adopted in this final rule provides rail 
    shippers and carriers maximum flexibility in meeting regulatory 
    requirements and is consistent with requirements for other modes of 
    transportation. At times, damage-free transportation can be achieved by 
    loading packages so tightly within a vehicle or freight container that 
    each package is protected by those around it and the total load does 
    not exceed the design strength of the walls or doors. For such loads, 
    no additional equipment or material is necessary. With other load 
    configurations, material in addition to the packages is necessary to 
    create a tight load.
        In response to concerns expressed by commenters, this final rule 
    explicitly mandates blocking and bracing (i.e., a lading restraint 
    system), when the required protection cannot be achieved through use of 
    other freight.
    
    Section 174.67
    
        The shipping community uses interior heater coils to improve the 
    ability of a solid or viscous product to flow and thereby reduce tank 
    car unloading times. The interior coils consist of a series of 
    longitudinally arranged and manifolded welded pipe so that one to four 
    inlet and outlet pipe connections allow circulation of a heating 
    medium, usually steam or hot oil, throughout the entire system. The 
    current regulations require that, after a tank equipped with interior 
    heater coils is unloaded, the inlet and outlet pipe connections must be 
    left open for drainage and to prevent the potential collapse of the 
    coils from the vacuum otherwise created from condensing vapors. This 
    requirement applies whether or not the coils were actually used to heat 
    the commodity from the tank.
        Comments on this issue were split between supporters and those who 
    opposed removal of the requirements. Several commenters thought that if 
    steam were used, drainage of the condensate would inhibit corrosion. 
    RSPA and FRA believe it unlikely that keeping the inlet and outlet pipe 
    caps off will actually inhibit corrosion of the coils because heater 
    coils become bent and often water remains trapped in pipe valleys. 
    Further, because interior heater coils may exceed 700 feet in length 
    there is inadequate air flow within the coils to dry them completely. 
    In FRA's experience, the single most common failure of interior heater 
    coils is not corrosion or collapse but failure of coil anchors. When 
    the anchor fails, the coils move, creating stresses. Fatigue cracks may 
    occur in these high stress areas and create the potential for a 
    hazardous material release, RSPA has, within the last two years, issued 
    29 exemptions allowing the transportation of tank cars containing the 
    residue of a hazardous material with the heater coil pipe caps on the 
    heater coil pipes.
        After considering the comments received, RSPA and FRA conclude that 
    coil failures are usually the result of poor maintenance or operational 
    practices, both of which should be reviewed by the industry. This final 
    rule makes optional the current requirement that the inlet and outlet 
    pipe connections must remain open.
    
    Section 174.85
    
        Corresponding changes in Secs. 172.510 and 172.526 remove 
    provisions for a RESIDUE placard. Two commenters noted that proposed 
    paragraph (c) referenced ``rail car'' rather than ``tank car'', which 
    would expand current provisions. RSPA agrees and is revising paragraph 
    (c) to reference a tank car containing a residue of a hazardous 
    material.
    
    Part 178
    
    Section 178.337-2
    
        Two ASTM references are updated in paragraphs (b)(2)(i) and (ii).
    
    Part 179
    
        The following sections are revised by updating certain ASTM 
    specifications and deleting others that are no longer used, based on a 
    petition [P-1023] from AAR: Secs. 179.100-7, 179.100-10, 179.100-20, 
    179.102-1, 179.102-2, 179.200-7, 179.200-24, 179.201-5, and 179.300-7.
    
    [[Page 28671]]
    
    Sections 179.12 through 179.12-7
    
        Sections 179.12-1 through 179.12-7 are removed and Sec. 179.12 is 
    revised by incorporating provisions from Secs. 179.12-1 and 179.12-5. 
    The design and materials of construction for interior heater coils 
    require AAR approval. This final rule removes the DOT specification 
    requirements and allows AAR greater flexibility in approving heater 
    system designs.
    
    Section 179.15
    
        This section is added to consolidate pressure relief device 
    requirements currently contained in Secs. 173.314, 179.100-15, 179.200-
    18, 179.201-7 and 179.220-19 and adopt provisions to: (1) increase the 
    start-to-discharge pressure of pressure relief devices for certain low 
    pressure tanks while allowing the continued use of existing cars; (2) 
    allow for a reduced orifice in the upstream nozzle of a pressure relief 
    device to accommodate pressure surges; (3) increase the rupture disc 
    burst pressure for cars so equipped; (4) standardize the start-to-
    discharge pressure setting for all commodities and tank car 
    specifications; and (5) align the start-to-discharge pressure for tank 
    cars with a setting prescribed by the ASME code for pressure vessels.
        Most commenters endorsed RSPA's proposed addition of this section, 
    with minor editorial clarifications, stating that this was a worthwhile 
    change in the regulations that would enhance overall safety and benefit 
    a number of shippers and carriers. CMA stated that proposed provisions 
    in this new section would allow shippers to establish pressure relief 
    device settings that are more directly related to the product 
    requirements, rather than arbitrarily relating the settings to the tank 
    test pressure.
        The AAR and the Railway Progress Institute (RPI) suggested that 
    RSPA include the ``mid-range'' temperature proposed in Sec. 173.24b for 
    the calculation of outage and filling limits into pressure relief 
    device setting requirements. RSPA proposed a mid- range temperature of 
    43 deg.C (110 deg.F) for certain thermally protected and jacketed tank 
    cars. RSPA and FRA agree, and a mid-range temperature requirement is 
    added in paragraph (b)(1).
        Several commenters suggested that RSPA adopt a range for the burst 
    pressure, as opposed to a set burst pressure (e.g., from 20 to 33 
    percent of the tank burst pressure for DOT 111A60W tank cars). Other 
    commenters suggested an extension of the proposed one-year period 
    because development of rupture discs that are designed to the 
    dimensions of the rupture disc holder may take longer than one year and 
    thus would not be commercially available. The commenters claimed that 
    if this requirement were adopted and made effective within one year, 
    the current inventory of rupture discs would become worthless.
        RSPA and FRA believe the need to increase the burst pressure of a 
    rupture disc installed in a nonreclosing pressure relief device is 
    warranted because of the number of premature rupture disc failures in 
    transportation which have resulted in railroad employee injuries. Of 
    the 5,406 reported hazardous materials releases by rail from 1990 
    through 1994, RSPA received reports of 1,716 rupture disc failures (an 
    average of 343 each year). RSPA also received 418 reports of railroad 
    employee injuries as a result of a release of hazardous materials (all 
    sources of release for an average of 84 each year). Because rupture 
    disc failures account for nearly 32 percent of the total number of 
    releases by rail during this study period, RSPA and FRA believe that 
    there will be a considerable decrease in the number of premature 
    rupture disc failures as a result of increasing the burst pressure of 
    the rupture disc.
        This final rule adopts a rupture disc burst pressure of 33 percent 
    of the tank burst pressure because such pressures can reduce premature 
    failures in the transportation system. Rupture discs are required to be 
    manufactured with a tolerance of +0 to -15 percent of the burst 
    pressure marked on the rupture disc. (See A5.02 of the AAR Tank Car 
    Manual.) In addition, in response to concerns expressed by commenters, 
    RSPA is extending the proposed one-year transition period in paragraph 
    (f) to October 1, 1998. This extension will minimize cost impacts in 
    implementing new designs and will facilitate depletion of existing 
    inventory of rupture discs.
        One commenter suggested that RSPA incorporate a requirement for a 
    ``means of inspection of the disc without releasing clamping pressure 
    on the disc,'' similar to A4.07(d) in the AAR Specifications for Tank 
    Cars. Many safety vent devices in use today have such features, 
    including hinged covers and screw plugs, for the inspection of a 
    rupture disc. While these devices are designed to meet the requirements 
    of the AAR specifications, RSPA and FRA believe that in order to fully 
    inspect a rupture disc, the disc must be removed from the safety vent 
    device. It is important that a careful inspection (both top and bottom 
    of the disc) be conducted for corrosion and damage because it has been 
    FRA's experience that a rupture disc may appear normal on the top side, 
    but be severely damaged or corroded on the bottom side. For these 
    reasons, RSPA recently amended the regulations under Docket HM-201 to 
    require a careful inspection of the rupture disc. See 
    Sec. 173.31(d)(1)(vi), effective July 1, 1996 (60 FR 49048, 49073).
        In addition, the following editorial changes are made to provisions 
    proposed in the NPRM: paragraph (b)(4) is revised by removing the word 
    ``valve''; paragraph (e)(2) is revised by replacing the word ``fail'' 
    with ``burst'' and by adding the wording ``at not greater than'' before 
    ``95''; a new paragraph (e)(3) is added to base the vapor tight 
    pressure and the start-to-discharge tolerance on the discharge setting 
    of the reclosing pressure relief device; in paragraph (f), paragraph 
    ``(b)(4)'' is added after paragraph ``(a)''; and paragraph (g) is 
    revised to require each pressure relief device to communicate with the 
    vapor space above the lading as near as practicable on the longitudinal 
    centerline and center of the tank.
    
    Sections 179.100-15, 179.200-18, 179.201-7, and 179.220-19
    
        These sections contain provisions for safety relief devices. 
    Because requirements for safety relief devices are consolidated in 
    Sec. 179.15, RSPA is removing these sections from the HMR.
    
    Sections 179.101-1 and 179.201-1
    
        Individual specification requirements for pressure tank cars and 
    non-pressure tank cars are revised. These revisions correct many 
    typographical errors and remove several special references that are no 
    longer applicable. RSPA also is adding a new class ``DOT 120A'' 
    specification tank car and a new ``DOT 111A60W6'' specification tank 
    car in the table based on two petitions for rulemaking [P-1044 and P-
    1119] from AAR. One commenter correctly noted that if the DOT 120A tank 
    car is adopted, RSPA should assign packaging authorizations in Part 173 
    and Sec. 172.102. The commenter also requested that this car be 
    authorized in Sec. 173.314 for ``Division 2.2 not specifically 
    identified in this table''. RSPA agrees and is adding authorizations 
    for a DOT120A tank car to appropriate sections. RSPA is removing 
    certain entries from the table since these provisions are currently 
    found in the text proceeding the table (see for example Secs. 179.200-
    11, 179.200-14, and 179.200- 16). An editorial revision is made to a 
    reference in the Sec. 179.201-1 table for DOT
    
    [[Page 28672]]
    
    111A100W4, based on a commenter's suggestion.
    
    Section 179.102-4
    
        Paragraph (d), which specifies at least one pressure relief valve 
    on a tank car tank used to transport vinyl fluoride, inhibited, is 
    removed, consistent with the consolidation of safety relief device 
    provisions in Sec. 179.15. In addition, paragraphs (b) and (c) are 
    redesignated paragraphs (a) and (b), paragraphs (e) through (k) are 
    redesignated paragraphs (c) through (i), and reserved paragraph (l) is 
    removed.
    
    Section 179.103-5
    
        Paragraph (b)(2) is revised as proposed to adopt requirements for 
    the attachment of unloading connections for bottom outlets on pressure 
    tank cars. This revision reflects existing requirements for bottom 
    outlets on non-pressure tank cars.
    
    Section 179.200-7
    
        In addition to the revision of the paragraph (b) table discussed 
    previously, certain ASTM specifications are revised to remove 
    references to outdated publications. The entry for ASTM B 209-70, Alloy 
    6061 is removed, as are footnotes 4 and 5 associated with that entry. 
    Footnote 2 following the paragraph (d) table is revised to reference 
    Practice A of ASTM A 262-85, which is a definitive, rapid method of 
    identifying, by simple etching, those specimens free of susceptibility 
    to intergranular attack.
    
    Section 179.200-14
    
        The first sentence of paragraph (a) and the first sentence of 
    paragraph (b) are revised to recognize the new outage and filling 
    limits for tank cars adopted in Docket HM-181.
    
    Section 179.200-16
    
        RSPA is revising the first sentence in paragraph (d) to require an 
    outage scale visible through the manway opening when using a gauging 
    device. RSPA is adopting a commenter's suggested alternative wording 
    because it clarifies this provision.
    
    Section 179.200-24
    
        Based on a commenter's suggestion to indicate the grade of material 
    for the entry ``Material'', the reference to ``ASTM A 285C'' is revised 
    to read ``ASTM A 516-GR 70''.
    
    Section 179.201-4
    
        This section is adopted as proposed to refer to Footnote 2 of 
    Sec. 179.200-7(d) rather than the AAR Specifications to specify 
    material requirements for fittings, tubes, castings, projections, and 
    closures.
    
    Sections 179.220-7 and 179.300-7
    
        References to ASTM A 515 and ASTM A 285 are removed from the table 
    following paragraph (b) in Sec. 179.220-7 and the table following 
    paragraph (a) in Sec. 179.300-7, because these specifications no longer 
    are authorized for new construction.
    
    Section 179.221-1
    
        RSPA is revising the class DOT 115A specification table as noted in 
    the discussion of Secs. 179.101-1 and 179.201-1.
    
    Sections 179.222, 179.222-1, and 179.500-17
    
        These sections are removed because identical provisions are 
    contained elsewhere in the HMR.
    
    III. Rulemaking Analyses and Notices
    
    A. Executive Order 12866 and DOT Regulatory Policies and Procedures
    
        This final rule is not considered a significant regulatory action 
    under section 3(f) of Executive Order 12866 and therefore, was not 
    reviewed by the Office of Management and Budget. The rule is not 
    considered a significant rule under the Regulatory Policies and 
    Procedures of the Department of Transportation [44 FR 11034].
        The economic impact of this rule is expected to result in only 
    minimal costs to certain persons subject to the HMR and may result in 
    modest cost savings to a small number of persons subject to the HMR and 
    to the agency. Because of the minimal economic impact of this rule, 
    preparation of a regulatory impact analysis or a regulatory evaluation 
    is not warranted.
    
    B. Executive Order 12612
    
        This final rule has been analyzed in accordance with the principles 
    and criteria contained in Executive Order 12612 (``Federalism''). 
    Federal law expressly preempts State, local, and Indian tribe 
    requirements applicable to the transportation of hazardous material 
    that cover certain subjects and are not substantively the same as 
    Federal requirements. 49 U.S.C. 5125(b)(1). These subjects are:
        (1) The designation, description, and classification of hazardous 
    material;
        (2) The packing, repacking, handling, labeling, marking, and 
    placarding of hazardous material;
        (3) The preparation, execution, and use of shipping documents 
    pertaining to hazardous material, and requirements respecting the 
    number, content, and placement of such documents;
        (4) The written notification, recording, and reporting of the 
    unintentional release in transportation of hazardous material; or
        (5) The design, manufacturing, fabrication, marking, maintenance, 
    reconditioning, repairing, or testing of a package or container which 
    is represented, marked, certified, or sold as qualified for use in the 
    transportation of hazardous material.
        This final rule preempts State, local, or Indian tribe requirements 
    concerning these subjects unless the non-Federal requirements are 
    ``substantively the same'' (see 49 CFR 107.202(d)) as the Federal 
    requirements.
        Federal law (49 U.S.C. 5125(b)(2)) provides that if DOT issues a 
    regulation concerning any of the covered subjects, after November 16, 
    1990, DOT must determine and publish in the Federal Register the 
    effective date of Federal preemption. The effective date may not be 
    earlier than the 90th day following the date of issuance of the final 
    rule and not later than two years after the date of issuance. RSPA has 
    determined that the effective date of Federal preemption for these 
    requirements will be October 1, 1996. Thus, RSPA lacks discretion in 
    this area, and preparation of a federalism assessment is not warranted.
    
    C. Regulatory Flexibility Act
    
        This final rule responds to petitions for rulemaking and agency 
    review. It is intended to provide clarification of the regulations and 
    relax certain requirements. Therefore, I certify that this final rule 
    will not have a significant economic impact on a substantial number of 
    small entities.
    
    D. Paperwork Reduction Act
    
        Under the Paperwork Reduction Act of 1995, no person is required to 
    respond to a collection of information unless it displays a valid OMB 
    control number. Information collection requirements in 49 CFR parts 172 
    and 174 pertaining to shipping papers are currently approved under OMB 
    control number 2137-0051. A requirement to annotate a reporting mark 
    and number on shipping documents for certain rail shipments reflects a 
    current rail carrier operating requirement and insignificantly 
    increases the amount of burden imposed by this collection. Some 
    provisions adopted in this final rule, such as elimination of 
    requirements for placing placard endorsements and placard notations on 
    shipping documents, will result in a minor reduction in the amount of 
    burden imposed by this collection. RSPA believes that these changes in 
    burden are not sufficient to warrant
    
    [[Page 28673]]
    
    revision of the currently approved information collection.
    
    E. Regulation Identifier Number (RIN)
    
        A regulation identifier number (RIN) is assigned to each regulatory 
    action listed in the Unified Agenda of Federal Regulations. The 
    Regulatory Information Service Center publishes the Unified Agenda in 
    April and October of each year. The RIN number contained in the heading 
    of this document can be used to cross-reference this action with the 
    Unified Agenda.
    
    List of Subjects
    
    49 CFR Part 171
    
        Exports, Hazardous materials transportation, Hazardous waste, 
    Imports, Incorporation by reference, Reporting and recordkeeping 
    requirements.
    
    49 CFR Part 172
    
        Hazardous materials transportation, Hazardous waste, Labels, 
    Markings, Packaging and containers, Reporting and recordkeeping 
    requirements.
    
    49 CFR Part 173
    
        Hazardous materials transportation, Packaging and containers, 
    Radioactive materials, Reporting and recordkeeping requirements, 
    Uranium.
    
    49 CFR Part 174
    
        Hazardous materials transportation, Radioactive materials, Railroad 
    safety.
    
    49 CFR Part 178
    
        Hazardous materials transportation, Incorporation by reference, 
    Motor vehicles safety, Packaging and containers, Reporting and 
    recordkeeping requirements.
    
    49 CFR Part 179
    
        Hazardous materials transportation, Incorporation by reference, 
    Railroad safety, Reporting and recordkeeping requirements.
    
        In consideration of the foregoing, 49 CFR Chapter I is amended as 
    follows:
    
    PART 171--GENERAL INFORMATION, REGULATIONS, AND DEFINITIONS
    
        1. The authority citation for Part 171 continues to read as 
    follows:
    
        Authority: 49 U.S.C. 5101-5127; 49 CFR 1.53.
    
        2. In the Sec. 171.7(a)(3) Table, under the entry American Society 
    for Testing and Materials, 9 entries are removed and 9 new entries are 
    added in alphabetical order, to read as follows:
    
    
    Sec. 171.7  Reference material.
    
        (a) Matter incorporated by reference * * *
        (3) Table of material incorporated by reference. * * *
    
    ------------------------------------------------------------------------
       Source and name of material                49 CFR reference          
    ------------------------------------------------------------------------
                                                                            
           *                  *                  *                  *       
                      *                  *                  *               
     American Society for Testing and                                       
                Materials                                                   
                                                                            
           *                  *                  *                  *       
                      *                  *                  *               
    [Remove]                                                                
    ASTM A 20-81 Standard              178.337; 179.102-17                  
     Specification for General                                              
     Requirements for Steel Plates                                          
     for Pressure Vessels, Revision C.                                      
                                                                            
           *                  *                  *                  *       
                      *                  *                  *               
    ASTM A 240-82 Standard             178.57; 178.358; 179.100; 179.200;   
     Specification for Heat-Resisting   179.201; 179.220; 179.400.          
     Chromium and Chromium-Nickel                                           
     Stainless Steel Plate, Sheet and                                       
     Strip for Fusion-Welded Unfired                                        
     Pressure Vessels, Revision A.                                          
                                                                            
           *                  *                  *                  *       
                      *                  *                  *               
    ASTM A 262-68 Recommended          179.100; 179.200.                    
     Practices for Detecting                                                
     Susceptibility to Intergranular                                        
     Attack in Stainless Steels.                                            
                                                                            
           *                  *                  *                  *       
                      *                  *                  *               
    ASTM A 302-78 Pressure Vessel      179.100; 179.200; 179.220.           
     Plates, Alloy Steel, Manganese-                                        
     Molybdenum and Manganese-                                              
     Molybdenum Nickel.                                                     
                                                                            
           *                  *                  *                  *       
                      *                  *                  *               
    ASTM A 370-77 Standard Methods     179.102-4 and 179.102-17             
     and Definition for Mechanical                                          
     Testing of Steel Products.                                             
                                                                            
           *                  *                  *                  *       
                      *                  *                  *               
    ASTM A 516-79b Standard            178.337; 179.100; 179.102; 179.200   
     Specification for Pressure         179.220                             
     Vessel Plates, Carbon Steel, for                                       
     Moderate and Lower-Temperature                                         
     Service.                                                               
    ASTM A 537-80 Standard             179.100; 179.102.                    
     Specification for Pressure                                             
     Vessel Plates, Heat-Treated,                                           
     Carbon-Manganese-Silicon Steel.                                        
                                                                            
           *                  *                  *                  *       
                      *                  *                  *               
    ASTM B 162-69 Nickel Plate,        179.200.                             
     Sheet, and Strip.                                                      
    ASTM B 209-69 Aluminum Alloy       179.100; 179.200; 179.220            
     Sheet and Plate.                                                       
                                                                            
           *                  *                  *                  *       
                      *                  *                  *               
    [Add]                                                                   
    ASTM A 20/A 20M-93a Standard       178.337-2; 179.102-4; 179.102-17.    
     Specification for General                                              
     Requirements for Steel Plates                                          
     for Pressure Vessels.                                                  
                                                                            
           *                  *                  *                  *       
                      *                  *                  *               
    ASTM A 240/A 240M-94b Standard     178.57; 178.358-5; 179.100-7; 179.100-
     Specification for Heat-Resisting   10; 179.102-1; 179.102-4; 179.102-  
     Chromium and Chromium-Nickel       17; 179.200-7; 179.201-5; 179.220-7;
     Stainless Steel Plate, Sheet and   179.400-5.                          
     Strip for Pressure Vessels.                                            
    
    [[Page 28674]]
    
                                                                            
                                                                            
           *                  *                  *                  *       
                      *                  *                  *               
    ASTM A 262-93a Standard Practices  179.100-7; 179.200-7; 179.201-4.     
     for Detecting Susceptibility to                                        
     Intergranular Attack in                                                
     Austenitic Stainless Steels.                                           
                                                                            
           *                  *                  *                  *       
                      *                  *                  *               
    ASTM A 302/A 302M-93 Standard      179.100-7; 179.200-7; 179.220-7.     
     Specification for Pressure                                             
     Vessel Plates, Alloy Steel,                                            
     Manganese-Molybdenum and                                               
     Manganese-Molybdenum Nickel.                                           
                                                                            
           *                  *                  *                  *       
                      *                  *                  *               
    ASTM A 370-94 Standard Test        179.102-1; 179.102-4; 179.102-17.    
     Methods and Definitions for                                            
     Mechanical Testing of Steel                                            
     Products.                                                              
                                                                            
           *                  *                  *                  *       
                      *                  *                  *               
    ASTM A 516/A 516M-90 Standard      178.337-2; 179.100-7; 179.100-20;    
     Specification for Pressure         179.102-1; 179.102-2; 179.102-4;    
     Vessel Plates, Carbon Steel, for   179.102-17; 179.200-7; 179.220-7.   
     Moderate and Lower- Temperature                                        
     Service.                                                               
    ASTM A 537/A 537M-91 Standard      179.100-7; 179.102-4; 179.102-17.    
     Specification for Pressure                                             
     Vessel Plates, Heat-Treated,                                           
     Carbon-Manganese-Silicon Steel.                                        
                                                                            
           *                  *                  *                  *       
                      *                  *                  *               
    ASTM B 162-93a Standard            179.200-7.                           
     Specification for Nickel Plate,                                        
     Sheet, and Strip.                                                      
    ASTM B 209-93 Standard             179.100-7; 179.200-7; 179.220-7.     
     Specification for Aluminum and                                         
     Aluminum-Alloy Sheet and Plate.                                        
                                                                            
           *                  *                  *                  *       
                      *                  *                  *               
    ------------------------------------------------------------------------
    
    
    * * * * *
    
    
    Sec. 171.7  [Amended]
    
        3. In addition, Sec. 171.7, in the paragraph (a)(3) table, the 
    following changes are made:
        a. Under American Society for Testing and Materials, the following 
    entries are removed: ASTM A 53-69a, ASTM A 178-70, ASTM A 192-69, ASTM 
    A 269-69, ASTM A 285-78, ASTM A 312-70a, ASTM A 515-69, ASTM B 161-70, 
    ASTM B 210-70, ASTM B 221-76, ASTM B 241-76.
        b. Under Association of American Railroads, for the entry ``AAR 
    Manual of Standards and Recommended Practices, Section I, Specially 
    Equipped Freight Car and Intermodal Equipment, 1988'' in Column (2), a 
    reference ``174.55;'' is added as the first reference.
        c. Under Association of American Railroads, for the entry ``AAR 
    Manual of Standards and Recommended Practices, Section C--Part III, 
    Specifications for Tank Cars, Specification M-1002, September 1992'' in 
    Column (2), a reference ``179.15;'' is added in numerical order.
    
    PART 172--HAZARDOUS MATERIALS TABLE, SPECIAL PROVISIONS, HAZARDOUS 
    MATERIALS COMMUNICATIONS, EMERGENCY RESPONSE INFORMATION, AND 
    TRAINING REQUIREMENTS
    
        4. The authority citation for Part 172 continues to read as 
    follows:
    
        Authority: 49 U.S.C. 5101-5127; 49 CFR 1.53.
    
    
    Sec. 172.101  [Amended]
    
        5. In Sec. 172.101, in the Hazardous Materials Table, the following 
    changes are made:
        a. For the following entries, in Column (7), Special Provision 
    ``B12,'' is removed:
    
    Acrolein, inhibited;
    Bromine or Bromine solutions;
    Bromine chloride;
    Dinitrogen tetroxide, liquefied;
    Formic acid;
    Hydrocyanic acid, aqueous solutions or Hydrogen cyanide, aqueous 
    solutions with not more than 20 percent hydrogen cyanide;
    Hydrocyanic acid, aqueous solutions with less than 5 percent hydrogen 
    cyanide;
    Hydrofluoric acid, solution, with more than 60 percent strength;
    
    [[Page 28675]]
    
    Hydrofluoric acid, solution, with not more than 60 percent strength;
    Hydrogen cyanide, stabilized with less than 3 percent water;
    Hydrogen fluoride, anhydrous;
    Hydrogen peroxide and peroxyacetic acid mixtures, stabilized with 
    acids, water and not more than 5 percent peroxyacetic acid;
    Hydrogen peroxide, aqueous solutions with more than 40 percent but not 
    more than 60 percent hydrogen peroxide (stabilized as necessary);
    Hydrogen peroxide, aqueous solutions with not less than 20 percent but 
    not more than 40 percent hydrogen peroxide (stabilized as necessary);
    Hydrogen peroxide, stabilized or Hydrogen peroxide aqueous solutions, 
    stabilized with more than 60 percent hydrogen peroxide;
    Motor fuel anti-knock mixtures;
    Nitric acid other than red fuming, with more than 70 percent nitric 
    acid;
    Nitric acid other than red fuming, with not more than 70 percent nitric 
    acid;
    Nitric oxide;
    Nitric oxide and dinitrogen tetroxide mixtures or Nitric oxide and 
    nitrogen dioxide mixtures;
    Perchloryl fluoride;
    Phosphorus, amorphous;
    Phosphorus, white dry or Phosphorus, white, under water or Phosphorus, 
    white, in solution or Phosphorus, yellow dry or Phosphorus, yellow, 
    under water or Phosphorus, yellow, in solution;
    Phosphorous white, molten;
    Potassium nitrate and sodium nitrite mixtures;
    Sulfur trioxide, inhibited; and
    Sulfur trioxide, uninhibited.
    
        b. For the entry ``Calcium carbide'', for Packing Groups I and II, 
    in Column (7), Special Provision ``B59,'' is added immediately 
    following ``B55,'' each place it appears.
        c. For the entries ``Carbon dioxide, solid or Dry ice'' and 
    ``Potassium permanganate'', in Column (7), Special Provision ``B12'' is 
    removed.
        d. For the entry ``Dimethylhydrazine, unsymmetrical'', in Column 
    (7), Special Provision ``B79,'' is removed.
        6. In Sec. 172.102, in paragraph (c)(3), Special Provisions B12 and 
    B79 are removed and Special Provisions B42, B57, B65, B71, B72, B74, 
    B76 and the first sentence of B78 are revised to read as follows:
    
    
    Sec. 172.102  Special provisions.
    
    * * * * *
        (c) * * *
        (3) * * *
    
    Code/Special Provisions
    
    * * * * *
    B42  Tank cars must have a test pressure of 34.47 Bar (500 psig) or 
    greater and conform to Class 105J. Each tank car must have a safety 
    relief device having a start-to-discharge pressure of 10.34 Bar (150 
    psig). The tank car specification may be marked to indicate a test 
    pressure of 13.79 Bar (200 psig).
    * * * * *
    B57  Class 115A tank car tanks used to transport chloroprene must be 
    equipped with a safety vent of a diameter not less than 305 mm (12 
    inches) with a maximum rupture disc pressure of 45 psi.
    * * * * *
    B65  Tank cars must have a test pressure of 34.47 Bar (500 psig) or 
    greater and conform to Class 105J. Each tank car must have a safety 
    relief device having a start-to-discharge pressure of 15.51 Bar (225 
    psig). The tank car specification may be marked to indicate a test 
    pressure of 20.68 Bar (300 psig).
    * * * * *
    B71  Tank cars must have a test pressure of 20.68 Bar (300 psig) or 
    greater and conform to Class 105, 112, 114 or 120.
    B72  Tank cars must have a test pressure of 34.47 Bar (500 psig) or 
    greater and conform to Class 105J, 106, or 110.
    B74  Tank cars must have a test pressure of 20.68 Bar (300 psig) or 
    greater and conform to Class 105S, 106, 110, 112J, 114J or 120S.
    B76  Tank cars must have a test pressure of 20.68 Bar (300 psig) or 
    greater and conform to Class 105S, 112J, 114J or 120S. Each tank car 
    must have a safety relief device having a start-to-discharge 
    pressure of 10.34 Bar (150 psig). The tank car specification may be 
    marked to indicate a test pressure of 13.79 Bar (200 psig).
    * * * * *
    B78  Tank cars must have a test pressure of 4.14 Bar (60 psig) or 
    greater and conform to Class 103, 104, 105, 109, 111, 112, 114 or 
    120. * * *
    * * * * *
    
    
    Sec. 172.102  [Amended]
    
        7. In addition, in Sec. 172.102, in paragraph (c)(3), the following 
    changes are made:
        a. For Special Provision B4, the wording ``AAR 206 tank car tanks 
    and'' is removed.
        b. For Special Provision B5, the wording ``DOT 103 ALW, 111A60 ALW 
    tank car tanks and'' is removed.
        c. For Special Provision B10, the wording ``AAR 206 tank car 
    tanks,'' is removed.
        8. In Sec. 172.203, paragraphs (e)(2) and (g) are revised to read 
    as follows:
    
    
    Sec. 172.203  Additional description requirements.
    
    * * * * *
        (e) * * *
        (2) The description on the shipping paper for a tank car containing 
    the residue of a hazardous material must include the phrase, ``RESIDUE: 
    LAST CONTAINED * * *'' before the basic description.
    * * * * *
        (g) Transportation by rail. (1) A shipping paper prepared by a rail 
    carrier for a rail car, freight container, transport vehicle or 
    portable tank that contains hazardous materials must include the 
    reporting mark and number when displayed on the rail car, freight 
    container, transport vehicle or portable tank.
        (2) The shipping paper for each DOT-113 tank car containing a 
    Division 2.1 material or its residue must contain an appropriate 
    notation, such as ``DOT 113'', and the statement ``Do not hump or cut 
    off car while in motion.''
        (3) When shipments of elevated temperature materials are 
    transported under the exception permitted in Sec. 173.247(h)(3) of this 
    subchapter, the shipping paper must contain an appropriate notation, 
    such as ``Maximum operating speed 15 mph.''.
    * * * * *
        9. In Sec. 172.205, paragraph (f) is revised to read as follows:
    
    
    Sec. 172.205  Hazardous waste manifest.
    
    * * * * *
        (f) Transportation by rail. Notwithstanding the requirements of 
    paragraphs (d) and (e) of this section, the following requirements 
    apply:
        (1) When accepting hazardous waste from a non-rail transporter, the 
    initial rail transporter must:
        (i) Sign and date the manifest acknowledging acceptance of the 
    hazardous waste;
        (ii) Return a signed copy of the manifest to the non-rail 
    transporter;
        (iii) Forward at least three copies of the manifest to:
        (A) The next non-rail transporter, if any;
        (B) The designated facility, if the shipment is delivered to that 
    facility by rail; or
        (C) The last rail transporter designated to handle the waste in the 
    United States; and
        (iv) Retain one copy of the manifest and rail shipping paper in 
    accordance with 40 CFR 263.22.
        (2) Rail transporters must ensure that a shipping paper containing 
    all the information required on the manifest (excluding the EPA 
    identification numbers, generator certification and signatures) and, 
    for exports, an EPA Acknowledgment of Consent accompanies the hazardous 
    waste at all times. Intermediate rail transporters are not required to 
    sign either the manifest or shipping paper.
    
    [[Page 28676]]
    
        (3) When delivering hazardous waste to the designated facility, a 
    rail transporter must:
        (i) Obtain the date of delivery and handwritten signature of the 
    owner or operator of the designated facility on the manifest or the 
    shipping paper (if the manifest has not been received by the facility); 
    and
        (ii) Retain a copy of the manifest or signed shipping paper in 
    accordance with 40 CFR 263.22.
        (4) When delivering hazardous waste to a non-rail transporter, a 
    rail transporter must:
        (i) Obtain the date of delivery and the handwritten signature of 
    the next non-rail transporter on the manifest; and
        (ii) Retain a copy of the manifest in accordance with 40 CFR 
    263.22.
        (5) Before accepting hazardous waste from a rail transporter, a 
    non-rail transporter must sign and date the manifest and provide a copy 
    to the rail transporter.
    * * * * *
        10. In Sec. 172.330, paragraph (a)(1) is revised to read as 
    follows:
    
    
    Sec. 172.330   Tank cars and multi-unit tank car tanks.
    
        (a) * * *
        (1) In a tank car unless the following conditions are met:
        (i) The tank car must be marked on each side and each end as 
    required by Sec. 172.302 with the identification number specified for 
    the material in the Sec. 172.101 Table; and
        (ii) A tank car containing any of the following materials must be 
    marked on each side with the key words (including words such as 
    ``stabilized'', ``inhibited'', ``compressed'', or ``liquefied'') of the 
    proper shipping name specified for the material in the Sec. 172.101 
    Table, or with a common name authorized for the material in this 
    subchapter (e.g., ``Refrigerant Gas''):
    
    Acrolein, inhibited
    Ammonia, anhydrous, liquefied
    Ammonia solutions (more than 50% ammonia)
    Bromine or Bromine solutions
    Bromine chloride
    Chloroprene, inhibited
    Dispersant gas or Refrigerant gas (as defined in Sec. 173.115 of 
    this subchapter)
    Division 2.1 materials
    Division 2.2 materials (in Class DOT 107 tank cars only)
    Division 2.3 materials
    Formic acid
    Hydrocyanic acid, aqueous solutions
    Hydrofluoric acid, solution
    Hydrogen cyanide, stabilized (less than 3% water)
    Hydrogen fluoride, anhydrous
    Hydrogen peroxide, aqueous solutions (greater than 20% hydrogen 
    peroxide)
    Hydrogen peroxide, stabilized
    Hydrogen peroxide and peroxyacetic acid mixtures
    Nitric acid (other than red fuming)
    Phosphorus, amorphous
    Phosphorus, white dry or Phosphorus, white, under water or 
    Phosphorus white, in solution, or Phosphorus, yellow dry or 
    Phosphorus, yellow, under water or Phosphorus, yellow, in solution
    Phosphorus white, molten
    Potassium nitrate and sodium nitrate mixtures
    Potassium permanganate
    Sulfur trioxide, inhibited
    Sulfur trioxide, uninhibited
    * * * * *
        11. In Sec. 172.510, paragraph (a) is revised, paragraphs (b) and 
    (c) are removed, and paragraphs (d) and (e) are redesignated as 
    paragraphs (b) and (c), respectively, to read as follows:
    
    
    Sec. 172.510   Special placarding provisions: Rail.
    
        (a) White square background. The following must have the specified 
    placards placed on a white square background, as described in 
    Sec. 172.527:
        (1) Division 1.1 and 1.2 (explosive) materials which require 
    EXPLOSIVES 1.1 or EXPLOSIVES 1.2 placards affixed to the rail car;
        (2) Materials classed in Division 2.3 Hazard Zone A or 6.1 Packing 
    Group I Hazard Zone A which require POISON GAS or POISON placards 
    affixed to the rail car, including tank cars containing only a residue 
    of the material; and
        (3) Class DOT 113 tank cars used to transport a Division 2.1 
    (flammable gas) material, including tank cars containing only a residue 
    of the material.
    * * * * *
    
    
    Sec. 172.526  [Removed and Reserved]
    
        12. Section 172.526 is removed and reserved.
    
    PART 173--SHIPPERS--GENERAL REQUIREMENTS FOR SHIPMENTS AND 
    PACKAGINGS
    
        13. The authority citation for Part 173 continues to read as 
    follows:
    
        Authority: 49 U.S.C. 5102-5127; 49 CFR 1.53.
    
        14. In Sec. 173.24b, paragraph (a)(3) is removed and paragraph 
    (a)(1) is revised to read as follows:
    
    
    Sec. 173.24b  Additional general requirements for bulk packagings.
    
        (a) Outage and filling limits. (1) Except as otherwise provided in 
    this subchapter, liquids and liquefied gases must be so loaded that the 
    outage is at least five percent for materials poisonous by inhalation, 
    or at least one percent for all other materials, of the total capacity 
    of a cargo tank, portable tank, tank car (including dome capacity), 
    multi-unit tank car tank, or any compartment thereof, at the following 
    reference temperatures--
        (i) 46  deg.C (115  deg.F) for a noninsulated tank;
        (ii) 43  deg.C (110  deg.F) for a tank car having a thermal 
    protection system, incorporating a metal jacket that provides an 
    overall thermal conductance at 15.5  deg.C (60  deg.F) of no more than 
    10.22 kilojoules per hour per square meter per degree Celsius (0.5 Btu 
    per hour/per square foot/ per degree F) temperature differential; or
        (iii) 41  deg.C (105  deg.F) for an insulated tank.
    * * * * *
    
    
    Sec. 173.29  [Amended]
    
        15. In Sec. 173.29, paragraph (f) is removed and reserved.
    
    
    Sec. 173.240  [Amended]
    
        16. In Sec. 173.240, in paragraph (a), the wording ``or 115 tank 
    car tanks;'' is revised to read ``115, or 120 tank car tanks;''.
    
    
    Sec. 173.241  [Amended]
    
        17. In Sec. 173.241, in paragraph (a), the wording ``or 115 tank 
    car tanks;'' is revised to read ``115, or 120 tank car tanks;''.
    
    
    Sec. 173.242  [Amended]
    
        18. In Sec. 173.242, in paragraph (a), the wording ``or 115 tank 
    car tanks;'' is revised to read ``115, or 120 tank car tanks;''.
    
    
    Sec. 173.243  [Amended]
    
        19. In Sec. 173.243, in paragraph (a), the wording ``or 115 fusion-
    welded tank car tanks;'' is revised to read ``115, or 120 fusion-welded 
    tank car tanks;''.
    
    
    Sec. 173.244  [Amended]
    
        20. In Sec. 173.244, in paragraph (a), the wording ``or 114 fusion-
    welded tank car tanks;'' is revised to read ``114, or 120 fusion-welded 
    tank car tanks;''.
        21. In Sec. 173.314, as amended at 60 FR 49074, effective July 1, 
    1996, paragraph (b)(5) is removed, paragraph (b)(6) is redesignated as 
    paragraph (b)(5) and revised, Note 2 following the paragraph (c) table 
    is revised, and paragraph (i) is removed and reserved, to read as 
    follows:
    
    
    Sec. 173.314  Compressed gases in tank cars and multi-unit tank cars.
    
    * * * * *
        (b) * * *
        (5) Each tank car used for the transportation of anhydrous ammonia 
    or any material that meets the criteria of Division 2.1 or 2.3 must 
    have gaskets for manway cover plates and for mounting
    
    [[Page 28677]]
    
    of fittings designed (for temperature, application, media, pressure, 
    and size) to create a positive seal so that, under conditions normally 
    incident to transportation, there will not be an identifiable release 
    of the material to the environment. The use of sealants to install 
    gaskets is prohibited.
        (c) * * *
    
    Notes:
    * * * * *
        2. The liquefied gas must be so loaded so that the outage is at 
    least two percent of the total capacity of the tank at the reference 
    temperature of 46  deg.C (115  deg.F) for a noninsulated tank; 43 
    deg.C (110  deg.F) for a tank having a thermal protection system 
    incorporating a metal jacket that provides an overall thermal 
    conductance at 15.5  deg.C (60  deg.F) of no more than 10.22 
    kilojoules per hour per square meter per degree Celsius (0.5 Btu per 
    hour/per square foot/per degree F) temperature differential; or 41 
    deg.C (105  deg.F) for an insulated tank.
    * * * * *
    
    
    Sec. 173.314  [Amended]
    
        22. In addition, in Sec. 173.314, as amended at 60 FR 49074, 
    effective July 1, 1996, the following changes are made:
        a. In the paragraph (c) table, in Column 3, the wording ``, 120A'' 
    is added in numerical order for the following entries:
    
    Ammonia, anhydrous, or ammonia solutions > 50 percent ammonia
    Ammonia solutions with > 35 percent ammonia, but  50 percent 
    ammonia by mass
    Division 2.1 materials not specifically provided in this table
    Division 2.2 materials not specifically identified in this table
    Division 2.3 Zone B materials not specifically identified in this table
    Division 2.3 Zone C materials not specifically identified in this table
    Division 2.3 Zone D materials not specifically identified in this table 
    Ethylamine
    
        b. In the paragraph (c) table, in Column 3, for the entry 
    ``Dimethyl ether'', the class designations ``, 112, 114, 120'' are 
    added in appropriate numerical order.
    
    PART 174--CARRIAGE BY RAIL
    
        23. The authority citation for Part 174 continues to read as 
    follows:
    
        Authority: 49 U.S.C. 5101-5127; 49 CFR 1.53.
    
        24. Section 174.3 is revised to read as follows:
    
    
    Sec. 174.3  Unacceptable hazardous materials shipments.
    
        No person may accept for transportation or transport by rail any 
    shipment of hazardous material that is not in conformance with the 
    requirements of this subchapter.
    
    
    Sec. 174.8  [Removed]
    
        25. Section 174.8 is removed.
        26. Section 174.9 is revised to read as follows:
    
    
    Sec. 174.9  Inspection and acceptance.
    
        At each location where a hazardous material is accepted for 
    transportation or placed in a train, the carrier shall inspect each 
    rail car containing the hazardous material, at ground level, for 
    required markings, labels, placards, securement of closures and 
    leakage. This inspection may be performed in conjunction with 
    inspections required under parts 215 and 232 of this title.
    
    
    Sec. 174.10  [Removed]
    
        27. Section 174.10 is removed.
    
    
    Sec. 174.11  [Removed]
    
        28. Section 174.11 is removed.
    
    
    Sec. 174.18  [Removed]
    
        29. Section 174.18 is removed.
        30. Section 174.24 is revised to read as follows:
    
    
    Sec. 174.24  Shipping papers.
    
        A carrier may not accept or transport a hazardous material by rail 
    unless the carrier receives a shipping paper on which the hazardous 
    material is properly described in the manner prescribed in part 172 of 
    this subchapter. An originating carrier must retain a copy of the 
    shipping paper that bears the shipper's certification as required by 
    Sec. 172.204 of this subchapter. This section does not apply to a 
    material that is excepted from shipping paper requirements as specified 
    in Sec. 172.200 of this subchapter.
    
    
    Sec. 174.25  [Removed]
    
        31. Section 174.25 is removed.
        32. In Sec. 174.26, paragraph (a) is removed, paragraphs (b) and 
    (c) are redesignated as paragraphs (a) and (b), respectively, and newly 
    redesignated paragraph (b) is revised to read as follows:
    
    
    Sec. 174.26  Notice to train crews of placarded cars.
    
    * * * * *
        (b) A member of the train crew of a train transporting a hazardous 
    material must have a copy of a document for the hazardous material 
    being transported showing the information required by part 172 of this 
    subchapter.
    
    
    Secs. 174.47 and 174.48  [Removed]
    
        33. Sections 174.47 and 174.48 are removed.
    
    
    Sec. 174.49  [Removed]
    
        34. Section 174.49 is removed.
        35. Section 174.50 is revised to read as follows:
    
    
    Sec. 174.50  Nonconforming or leaking packages.
    
        Leaking packages other than tank cars may not be forwarded until 
    repaired, reconditioned, or overpacked in accordance with Sec. 173.3 of 
    this subchapter. Except as otherwise provided in this section, a tank 
    car that no longer conforms to this subchapter may not be forwarded 
    unless repaired or approved for movement by the Associate Administrator 
    for Safety, Federal Railroad Administration. Notification and approval 
    must be furnished in writing, or through telephonic or electronic means 
    with subsequent written confirmation provided within two weeks. For the 
    applicable address and telephone number, see part 107, subpart B, 
    Appendix A, of this chapter. A leaking tank car containing a hazardous 
    material may be moved without repair or approval only so far as 
    necessary to reduce or eliminate an immediate threat of harm to human 
    health or the environment when it is determined its movement would 
    provide greater safety than allowing the car to remain in place. In the 
    case of a liquid leak, measures must be taken to prevent the spread of 
    the liquid.
        36. Section 174.55 is revised to read as follows:
    
    
    Sec. 174.55  General requirements.
    
        (a) Each package containing a hazardous material being transported 
    by rail in a freight container or transport vehicle must be loaded so 
    that it cannot fall or slide and must be safeguarded in such a manner 
    that other freight cannot fall onto or slide into it under conditions 
    normally incident to transportation. When this protection cannot be 
    provided by using other freight, it must be provided by blocking and 
    bracing. For examples of blocking and bracing in freight containers and 
    transport vehicles, see Bureau of Explosives Pamphlet Nos. 6 and 6C.
        (b) Each package containing a hazardous material bearing package 
    orientation markings prescribed in Sec. 172.312 of this subchapter must 
    be loaded within a transport vehicle or freight container to remain in 
    the correct position indicated by those markings during transportation.
        (c) The doors of a freight container or transport vehicle may not 
    be used to secure a load that includes a package containing a hazardous 
    material unless the doors meet the design strength
    
    [[Page 28678]]
    
    requirements of Specification M-930 (for freight containers) and M-931 
    (for trailers) in the AAR's Manual of Standards and Recommended 
    Practices and the load is also within the limits of the design strength 
    requirements for the doors.
    
    
    Sec. 174.67  [Amended]
    
        37-38. In Sec. 174.67, in paragraph (k), the wording ``, except 
    that heater coil inlet and outlet pipes must be left open for 
    drainage'' is removed.
        39. Section 174.85 is amended by revising paragraph (c) to read as 
    follows:
    
    
    Sec. 174.85  Position in train of placarded cars, transport vehicles, 
    freight containers, and bulk packagings.
    
    * * * * *
        (c) A tank car containing the residue of a hazardous material must 
    be separated from a locomotive or occupied caboose by at least one non-
    placarded rail car.
    * * * * *
    
    PART 178--SPECIFICATIONS FOR PACKAGINGS
    
        40. The authority citation for part 178 continues to read as 
    follows:
    
        Authority: 49 U.S.C. 5101-5127; 49 CFR 1.53.
    
    
    Sec. 178.337-2  [Amended]
    
        41. In Sec. 178.337-2, the following changes are made:
        a. In paragraph (b)(2)(i), the wording ``A-516-72'' is revised to 
    read ``A 516''.
        b. In paragraph (b)(2)(ii) the wording ``A-20-72a'' is revised to 
    read ``A 20''.
    
    PART 179--SPECIFICATIONS FOR TANK CARS
    
        42. The authority citation for Part 179 continues to read as 
    follows:
    
        Authority: 49 U.S.C. 5101-5127; 49 CFR 1.53.
    
        43. Section 179.12 is revised to read as follows:
    
    
    Sec. 179.12  Interior heater systems.
    
        (a) Interior heater systems shall be of approved design and 
    materials. If a tank is divided into compartments, a separate system 
    shall be provided for each compartment.
        (b) Each interior heater system shall be hydrostatically tested at 
    not less than 13.79 bar (200 psi) and shall hold the pressure for 10 
    minutes without leakage or evidence of distress.
    
    
    Secs. 179.12-1 through 179.12-7  [Removed]
    
        44. Sections 179.12-1 through 179.12-7 are removed.
        45. Section 179.15 is added to read as follows:
    
    
    Sec. 179.15  Pressure relief devices.
    
        Except for DOT Class 106, 107, 110, and 113 tank cars, tanks must 
    have a pressure relief system that conforms to the following 
    requirements:
        (a) Performance standard. Each tank must have a pressure relief 
    system having sufficient flow capacity to prevent pressure build-up in 
    the tank to no more than the flow rating pressure of the pressure 
    relief device in fire conditions as defined in Appendix A of the 
    Association of American Railroads Specifications for Tank Cars.
        (b) Settings for pressure relief valves. (1) Except as provided in 
    paragraph (b)(2) of this section, a reclosing pressure relief valve 
    must have a minimum start-to-discharge pressure equal to the sum of the 
    static head and gas padding pressure and the lading vapor pressure at 
    the following reference temperatures:
        (i) 46  deg.C (115  deg.F) for noninsulated tanks;
        (ii) 43  deg.C (110  deg.F) for tanks having a thermal protection 
    system incorporating a metal jacket that provides an overall thermal 
    conductance at 15.5  deg.C (60  deg.F) of no more than 10.22 kilojoules 
    per hour per square meter per degree Celsius (0.5 Btu per hour/per 
    square foot/per degree F) temperature differential; and
        (iii) 41  deg.C (105  deg.F) for insulated tanks.
        (2)(i) The start-to-discharge pressure may not be lower than 5.17 
    Bar (75 psig) or exceed 33 percent of the minimum tank burst pressure.
        (ii) Tanks built prior to October 1, 1997 having a minimum tank 
    burst pressure of 34.47 Bar (500 psig) or less may be equipped with a 
    reclosing pressure relief valve having a start-to-discharge pressure of 
    not less than 14.5 percent of the minimum tank burst pressure but no 
    more than 33 percent of the minimum tank burst pressure.
        (3) The vapor tight pressure of a reclosing pressure relief valve 
    must be at least 80 percent of the start-to-discharge pressure.
        (4) The flow rating pressure must be 110 percent of the start-to-
    discharge pressure for tanks having a minimum tank burst pressure 
    greater than 34.47 Bar (500 psig) and from 110 percent to 130 percent 
    for tanks having a minimum tank burst pressure less than or equal to 
    34.47 Bar (500 psig).
        (5) The tolerance for a reclosing pressure relief valve is 
    3 psi for valves with a start-to-discharge pressure of 6.89 
    Bar (100 psig) or less and 3 percent for valves with a 
    start-to-discharge pressure greater than 6.89 Bar (100 psig).
        (c) Flow capacity of pressure relief systems. The total flow 
    capacity of each reclosing and nonreclosing pressure relief device must 
    conform to Appendix A of the Association of American Railroads 
    Specifications for Tank Cars.
        (d) Flow capacity tests. The manufacturer of any reclosing or 
    nonreclosing pressure relief device must design and test the device in 
    accordance with Appendix A of the Association of American Railroads 
    Specifications for Tank Cars.
        (e) Combination pressure relief systems. A nonreclosing pressure 
    relief device may be used in series with a nonreclosing pressure relief 
    valve. The pressure relief valve must be located outboard of the 
    nonreclosing pressure relief device.
        (1) When a breaking pin device is used in combination with a 
    reclosing pressure relief valve, the breaking pin must be designed to 
    fail at the start-to-discharge pressure specified in paragraph (b) of 
    this section, and the reclosing pressure relief valve must be designed 
    to discharge at not greater than 95 percent of the start-to-discharge 
    pressure.
        (2) When a rupture disc is used in combination with a reclosing 
    pressure relief valve, the rupture disc must be designed to burst at 
    the start-to-discharge pressure specified in paragraph (b) of this 
    section, and the reclosing pressure relief valve must be designed to 
    discharge at not greater than 95 percent of the start-to-discharge 
    pressure. A device must be installed to detect any accumulation of 
    pressure between the rupture disc and the reclosing pressure relief 
    valve. The detection device must be a needle valve, trycock, or tell-
    tale indicator. The detection device must be closed during 
    transportation.
        (3) The vapor tight pressure and the start-to-discharge tolerance 
    is based on the discharge setting of the reclosing pressure relief 
    device.
        (f) Nonreclosing pressure relief device. In addition to paragraphs 
    (a), (b)(4), (c), and (d) of this section, a nonreclosing pressure 
    relief device must conform to the following requirements:
        (1) After October 1, 1998, a nonreclosing pressure relief device 
    must incorporate a rupture disc designed to burst at 33 percent of the 
    tank burst pressure.
        (2) The approach channel and the discharge channel may not reduce 
    the required minimum flow capacity of the pressure relief device.
        (3) The nonreclosing pressure relief device must be designed to 
    prevent interchange with other fittings installed on the tank car, must 
    have a structure that encloses and clamps the rupture disc in position 
    (preventing any distortion or damage to the rupture disc
    
    [[Page 28679]]
    
    when properly applied), and must have a cover, with suitable means of 
    preventing misplacement, designed to direct any discharge of the lading 
    downward.
        (4) The nonreclosing pressure relief device must be closed with a 
    rupture disc that is compatible with the lading and manufactured in 
    accordance with Appendix A of the AAR Specifications for Tank Cars. The 
    tolerance for a rupture disc is +0 to -15 percent of the burst pressure 
    marked on the disc.
        (g) Location of relief devices. Each pressure relief device must 
    communicate with the vapor space above the lading as near as 
    practicable on the longitudinal center line and center of the tank.
        (h) Marking of pressure relief devices. Each pressure relief device 
    and rupture disc must be permanently marked in accordance with the 
    Appendix A of the Association of American Railroads Specifications for 
    Tank Cars.
        46. In Sec. 179.100-7, the table in paragraph (a) is revised to 
    read as follows:
    
    
    Sec. 179.100-7  Materials.
    
        (a) * * *
    
    ------------------------------------------------------------------------
                                                                  Minimum   
                                                   Minimum     elongation in
                                                   tensile       2 inches   
                  Specifications                  strength       (percent)  
                                                  (p.s.i.)        welded    
                                                   welded        condition  
                                                condition\1\  (longitudinal)
    ------------------------------------------------------------------------
    AAR TC128, Gr. B..........................      81,000             20   
    ASTM A 302, Gr. B.........................      80,000             19   
    ASTM A 516................................      70,000             20   
    ASTM A 537, Class 1.......................      70,000            23    
    ------------------------------------------------------------------------
    \1\ Maximum stresses to be used in calculations.                        
    
    * * * * *
    
    
    Sec. 179.100-7  [Amended]
    
        47. In addition, in Sec. 179.100-7, the following changes are made:
        a. In the table in paragraph (b), the last entry ``ASTM B 209-70, 
    Alloy 6061\4\'' is removed and, in the first column, the wording ``209-
    70'' is revised to read ``209'' each place it appears.
        b. In the footnotes to the paragraph (b) table, Footnotes 4 and 5 
    are removed and Footnote 6 is redesignated as Footnote 4.
        c. In the table in paragraph (c)(1), the wording ``A240-70'' is 
    revised to read ``A 240'' each place it appears.
        d. In paragraph (c)(2)(i), the wording ``A262-68'' is revised to 
    read ``A 262'', the word ``Recommended'' is revised to read 
    ``Standard'', and the word ``Austenitic'' is added immediately before 
    ``Stainless Steel''.
    
    
    Sec. 179.100-10  [Amended]
    
        48. In Sec. 179.100-10, in paragraph (c), the wording ``ASTM A240-
    70'' is revised to read ``ASTM A 240''.
    
    
    Sec. 179.100-15  [Removed]
    
        49. Section 179.100-15 is removed and reserved.
    
    
    Sec. 179.100-20  [Amended]
    
        50. In Sec. 179.100-20, in the paragraph (a) table, for the entry 
    ``Material'', in the second column, the wording ``ASTM A515-70'' is 
    revised to read ``ASTM A 516''.
        51. Section 179.101-1 is revised to read as follows:
    
    
    Sec. 179.101-1  Individual specification requirements.
    
        In addition to Sec. 179.100, the individual specification 
    requirements are as follows:
    
    --------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                  Minimum                                                                                   
                                                       Bursting    plate       Test      Manway                                                             
          DOT specification            Insulation      pressure  thickness   pressure    cover      Bottom outlet      Bottom washout   Reference  (179.***)
                                                        (psi)     (inches)    (psi)    thickness                                                            
    --------------------------------------------------------------------------------------------------------------------------------------------------------
    105A100ALW...................  Yes..............        500        5/8        100  \2\ 2 1/2  No...............  No...............                      
    105A200ALW...................  Yes..............        500        5/8        200  \2\ 2 1/2  No...............  No...............                      
    105A300ALW...................  Yes..............        750        5/8        300  \2\ 2 5/8  No...............  No...............                      
    105A100W.....................  Yes..............        500   \3\ 9/16        100      2 1/4  No...............  No...............                      
    105A200W.....................  Yes..............        500   \3\ 9/16        200      2 1/4  No...............  No...............                      
    105A300W.....................  Yes..............        750  \1\ 11/16        300  \7\ 2 1/4  No...............  No...............                      
    105A400W.....................  Yes..............      1,000  \1\ 11/16        400  \7\ 2 1/4  No...............  No...............                      
    105A500W.....................  Yes..............      1,250  \1\ 11/16        500      2 1/4  No...............  No...............  102-1, 102-2.       
    105A600W.....................  Yes..............      1,500  \1\ 11/16        600      2 1/4  No...............  No...............  102-4, 102-17.      
    109A100ALW...................  Optional.........        500        5/8        100  \2\ 2 1/2  No...............  Optional.........                      
    109A200ALW...................  Optional.........        500        5/8        200  \2\ 2 1/2  No...............  Optional.........                      
    109A300ALW...................  Optional.........        750        5/8        300  \2\ 2 5/8  No...............  Optional.........                      
    109A300W.....................  Optional.........        500  \1\ 11/16        300      2 1/4  No...............  Optional.........                      
    112A200W.....................  Optional \4\.....        500  \3\ \5\ 9/       200      2 1/4  No...............  No...............                      
                                                                        16                                                                                  
    112A340W.....................  Optional \4\.....        850  \1\ 11/16        340      2 1/4  No...............  No...............                      
    112A400W.....................  Optional \4\.....      1,000  \1\ 11/16        400      2 1/4  No...............  No...............                      
    112A500W.....................  Optional \4\.....      1,250  \1\ 11/16        500      2 1/4  No...............  No...............                      
    114A340W.....................  Optional \4\.....        850  \1\ 11/16        340        \6\  Optional.........  Optional.........  103.                
    114A400W.....................  Optional \4\.....      1,000  \1\ 11/16        400        \6\  Optional.........  Optional.........  103.                
    120A200ALW...................  Yes..............        500        5/8        200  \2\ 2 1/2  Optional.........  Optional.........  103.                
    120A100W.....................  Yes..............        500   \3\ 9/16        100      2 1/4  Optional.........  Optional.........  103.                
    120A200W.....................  Yes..............        500   \3\ 9/16        200      2 1/4  Optional.........  Optional.........  103.                
    120A300W.....................  Yes..............        750  \1\ 11/16        300      2 1/4  Optional.........  Optional.........  103.                
    120A400W.....................  Yes..............      1,000  \1\ 11/16        400      2 1/4  Optional.........  Optional.........  103.                
    120A500W.....................  Yes..............      1,250  \1\ 11/16        500      2 1/4  Optional.........  Optional.........  103.                
    --------------------------------------------------------------------------------------------------------------------------------------------------------
    \1\ When steel of 65,000 to 81,000 p.s.i. minimum tensile strength is used, the thickness of plates shall be not less than 5/8 inch, and when steel of  
      81,000 p.s.i. minimum tensile strength is used, the minimum thickness of plate shall be not less than 9/16 inch.                                      
    \2\ When approved material other than aluminum alloys are used, the thickness shall be not less than 2 1/4 inches.                                      
    \3\ When steel of 65,000 p.s.i. minimum tensile strength is used, minimum thickness of plates shall be not less than 1/2 inch.                          
    \4\ Tank cars not equipped with a thermal protection or an insulation system used for the transportation of a Class 2 (compressed gas) material must    
      have at least the upper two-thirds of the exterior of the tank, including manway nozzle and all appurtenances in contact with this area, finished with
      a reflective coat of white paint.                                                                                                                     
    \5\ For inside diameter of 87 inches or less, the thickness of plates shall be not less than 1/2 inch.                                                  
    \6\ See AAR specifications for tank cars, Appendix E, E4.01 and Sec.  179.103-2.                                                                        
    \7\ When the use of nickel is required by the lading, the thickness shall not be less than two inches.                                                  
    
    
    [[Page 28680]]
    
    
    
    
    Sec. 179.102-1  [Amended]
    
        52. In Sec. 179.102-1, in paragraph (a)(1), the following changes 
    are made:
        a. In the first sentence, the wording ``A516-79b'' is revised to 
    read ``A 516''.
        b. At the end of the third sentence, the wording ``A370-77'' is 
    revised to read ``A 370''.
        c. In the last sentence, the wording ``A240-79'' is revised to read 
    ``A 240''.
    
    
    Sec. 179.102-2  [Amended]
    
        53. In Sec. 179.102-2, in paragraph (a)(1), the wording ``A516-
    70a'' is revised to read ``A 516'' and the wording ``TC-128-70'' is 
    revised to read ``TC-128''.
    
    
    Sec. 179.102-4  [Amended]
    
        54. In Sec. 179.102-4, the following changes are made:
        a. Paragraph (d) is removed.
        b. Paragraphs (b) and (c) are redesignated as paragraphs (a) and 
    (b), respectively.
        c. Paragraphs (e) through (k) are redesignated as paragraphs (c) 
    through (i), respectively.
        d. Paragraph (l) is removed.
        55. In Sec. 179.103-5, in paragraph (a)(3), the word ``valve'' is 
    removed, and paragraph (b)(2) is revised to read as follows:
    
    
    Sec. 179.103-5  Bottom outlets.
    
    * * * * *
        (b) * * *
        (2) To provide for the attachment of unloading connections, the 
    discharge end of the bottom outlet nozzle or reducer, the valve body of 
    the exterior valve, or some fixed attachment thereto, shall be provided 
    with one of the following arrangements or an approved modification 
    thereof. (See appendix E. Fig. E17 of the AAR Specifications for Tank 
    Cars for illustrations of some of the possible arrangements.)
        (i) A bolted flange closure arrangement including a minimum 1-inch 
    NPT pipe plug (see Fig. E17.1) or including an auxiliary valve with a 
    threaded closure.
        (ii) A threaded cap closure arrangement including a minimum 1-inch 
    NPT pipe plug (see Fig. E17.2) or including an auxiliary valve with a 
    threaded closure.
        (iii) A quick-coupling device using a threaded plug closure of at 
    least 1-inch NPT or having a threaded cap closure with a minimum 1-inch 
    NPT pipe plug (see Fig. E17.3 through E17.5). A minimum 1-inch 
    auxiliary test valve with a threaded closure may be substituted for the 
    1-inch pipe plug (see Fig E17.6). If the threaded cap closure does not 
    have a pipe plug or integral auxiliary test valve, a minimum 1-inch NPT 
    pipe plug shall be installed in the outlet nozzle above the closure 
    (see Fig. E17.7).
        (iv) A two-piece quick-coupling device using a clamped dust cap 
    must include an in-line auxiliary valve, either integral with the 
    quick-coupling device or located between the primary bottom outlet 
    valve and the quick-coupling device. The quick-coupling device closure 
    dust cap or outlet nozzle shall be fitted with a minimum 1-inch NPT 
    closure (see Fig. E17.8 and E17.9).
    * * * * *
        56. Section 179.200-7 is amended by revising the table in paragraph 
    (b) to read as follows:
    
    
    Sec. 179.200-7  Materials.
    
    * * * * *
        (b) * * *
    
    ------------------------------------------------------------------------
                                                   Minimum        Minimum   
                                                   tensile     elongation in
                                                  strength       2 inches   
                  Specifications                  (p.s.i.)    (percent) weld
                                                   welded          metal    
                                                  condition   (longitudinal)
    -------------------------------------------------\1\--------------------
    AAR TC 128, Gr. B.........................      81,000             19   
    ASTM A 516, Gr. 70........................      70,000             20   
    ------------------------------------------------------------------------
    \1\ Maximum stresses to be used in calculations.                        
    
    * * * * *
    
    
    Sec. 179.200-7  [Amended]
    
        57. In addition, in Sec. 179.200-7, the following changes are made:
        a. In the table in paragraph (c), the last entry ``ASTM B 209-70, 
    Alloy 6061 \4\'' is removed, and in the first column, for each entry, 
    the wording ``209-70'' is revised to read ``209''.
        b. In the paragraph (c) table, Footnotes 4 and 5 are removed and 
    Footnote 6 is redesignated as Footnote 4.
        c. In the table in paragraph (d), in the first column, for each 
    entry, the wording ``240-70'' is revised to read ``240''.
        d. In Footnote 2 in the paragraph (d) table, the wording ``the 
    following procedures in ASTM Specification A 262-68 titled, 
    'Recommended Practices for Detecting Susceptibility to Intergranular 
    Attack in Stainless Steels,' and must exhibit corrosion rates not 
    exceeding the following:'' is revised to read ``Practice A of ASTM 
    Specification A 262 titled, 'Standard Practices for Detecting 
    Susceptibility to Intergranular Attack in Austenitic Stainless Steels.' 
    If the specimen does not pass Practice A, Practice B or C must be used 
    and the corrosion rates may not exceed the following:''.
        e. In the table in paragraph (e), in the first column, the wording 
    ``162-692'' is revised to read ``1622''.
        f. In the table in paragraph (f), in the first column, the wording 
    ``302-69a'' is revised to read ``302''.
        58. In Sec. 179.200-14, the first sentence of paragraph (a) and the 
    first sentence of paragraph (b) are revised to read as follows:
    
    
    Sec. 179.200-14  Expansion capacity.
    
        (a) Tanks shall have expansion capacity as prescribed in this 
    subchapter. * * *
        (b) For tank cars having an expansion dome, the expansion capacity 
    is the total capacity of the tank and dome combined. * * *
    * * * * *
        59. In Sec. 179.200-16, the first sentence in paragraph (d) is 
    revised to read as follows:
    
    
    Sec. 179.200-16  Gauging devices, top loading and unloading devices, 
    venting and air inlet devices.
    
    * * * * *
        (d) When using a visual gauging device on a car with a hinged 
    manway cover, an outage scale visible through the manway opening shall 
    be provided. * * *
    * * * * *
    
    
    Sec. 179.200-18  [Removed]
    
        60. Section 179.200-18 is removed.
    
    
    Sec. 179.200-24  [Amended]
    
        61. In Sec. 179.200-24, in the paragraph (a) table, for the entry 
    ``Material'' , in the second column, the wording ``ASTM A285 C'' is 
    revised to read ``ASTM A 516-GR 70''.
        62. Section 179.201-1 is revised to read as follows:
    
    
    Sec. 179.201-1  Individual specification requirements.
    
        In addition to Sec. 179.200, the individual specification 
    requirements are as follows:
    
    --------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                        Minimum                                                                             
                                                           Bursting      plate         Test                                            References (179.201 -
         DOT Specification \1\           Insulation        pressure    thickness     pressure     Bottom  outlet     Bottom washout            ***)         
                                                            (psi)       (inches)      (psi)                                                                 
    --------------------------------------------------------------------------------------------------------------------------------------------------------
    103A-ALW.......................  Optional..........          240        \1/2\           60  No...............  Optional.                                
    
    [[Page 28681]]
    
                                                                                                                                                            
    103AW..........................  Optional..........          240    179.201-2           60  No...............  Optional.                                
    103ALW.........................  Optional..........          240        \1/2\           60  Optional.........  Optional.........  6(a).                 
    103ANW.........................  Optional..........          240    179.201-2           60  No...............  Optional.........  6(d).                 
    103BW..........................  Optional..........          240    179.201-2           60  No...............  No...............  6(b), 3.              
    103CW..........................  Optional..........          240    179.201-2           60  No...............  No...............  6(c), 4,5.            
    103DW..........................  Optional..........          240    179.201-2           60  Optional.........  Optional.........  6(a), 6(c), 4, 5.     
    103EW..........................  Optional..........          240    179.201-2           60  No...............  Optional.........  6(c), 4, 5.           
    103W...........................  Optional..........          240    179.201-2           60  Optional.........  Optional.........  6(a).                 
    104W...........................  Yes...............          240    179.201-2           60  Optional.........  Optional.........  6(a).                 
    111A60ALW1.....................  Optional..........          240        \1/2\           60  Optional.........  Optional.........  6(a).                 
    111A60ALW2.....................  Optional..........          240        \1/2\           60  No...............  Optional.                                
    111A60W1.......................  Optional..........          240       \7/16\           60  Optional.........  Optional.........  6(a).                 
    111A60W2.......................  Optional..........          240       \7/16\           60  No...............  Optional.                                
    111A60W5.......................  Optional..........          240       \7/16\           60  No...............  No...............  3, 6(b).              
    111A60W6.......................  Optional..........          240       \7/16\           60  Optional.........  Optional.........  4, 5, 6(a), 6(c).     
    111A60W7.......................  Optional..........          240       \7/16\           60  No...............  No...............  4, 5, 6(a).           
    111A100ALW1....................  Optional..........          500        \5/8\          100  Optional.........  Optional.........  6(a).                 
    111A100ALW2....................  Optional..........          500        \5/8\          100  No...............  Optional.                                
    111A100W1......................  Optional..........          500       \7/16\          100  Optional.........  Optional.........  6(a).                 
    111A100W2......................  Optional..........          500       \7/16\          100  No...............  Optional.                                
    111A100W3......................  Yes...............          500       \7/16\          100  Optional.........  Optional.........  6(a).                 
    111A100W4......................  Yes (see 179.201-           500       \7/16\          100  No...............  No...............  6(a), 8, 10.          
                                      11).                                                                                                                  
    111A100W5......................  Optional..........          500       \7/16\          100  No...............  No...............  3.                    
    111A100W6......................  Optional..........          500       \7/16\          100  Optional.........  Optional.........  4, 5, 6(a) and 6(c).  
    111A100W7......................  Optional..........          500       \7/16\          100  No...............  No...............  4, 5, 6(c).           
    --------------------------------------------------------------------------------------------------------------------------------------------------------
    \1\ Tanks marked ``ALW'' are constructed from aluminum alloy plate; ``AN'' nickel plate; ``CW,'' ``DW,'' ``EW,'' ``W6,'' and ``W7'' high alloy steel or 
      manganese-molybdenum steel plate; and those marked ``BW'' or ``W5'' must have an interior lining that conforms to Sec.  179.201-3.                    
    
    
    
    
    Sec. 179.201-4  [Amended]
    
        63. In Sec. 179.201-4, at the end of the paragraph, the wording 
    ``AAR Specifications for Tank Cars, appendix M, M3.03(b) and M4.05(d)'' 
    is revised to read ``ASTM Specification A 262''.
    
    
    Sec. 179.201-5  [Amended]
    
        64. In Sec. 179.201-5, in paragraphs (a) and (b), the wording 
    ``ASTM A240-70'' is revised to read ``ASTM Specification A 240'' each 
    place it appears.
    
    
    Sec. 179.201-7  [Removed]
    
        65. Section 179.201-7 is removed.
        66. In Sec. 179.220-7, the table in paragraph (b) is revised to 
    read as follows:
    
    
    Sec. 179.220-7  Materials.
    
    * * * * *
        (b) * * *
    
    ------------------------------------------------------------------------
                                                   Minimum        Minimum   
                                                   tensile     elongation in
                                                  strength       2 inches   
                  Specifications                  (p.s.i.)    (percent) weld
                                                   welded          metal    
                                                  condition   (longitudinal)
    -------------------------------------------------\1\--------------------
    AAR TC 128, Gr. B.........................      81,000             19   
    ASTM A 516, Gr. 70........................      70,000            20    
    ------------------------------------------------------------------------
    \1\ Maximum stresses to be used in calculations.                        
    
    * * * * *
    
    
    Sec. 179.220-7  [Amended]
    
        67. In addition, in Sec. 179.220-7, the following changes are made:
        a. In the table in paragraph (c), the last entry ``ASTM B 209-70, 
    Alloy 6061 4'' is removed, and the wording ``ASTM B 209-70'' is 
    revised to read ``ASTM B 209'' each place it appears.
        b. In the table in paragraph (d), the wording ``ASTM 240-70'' is 
    revised to read ``ASTM 240'' each place it appears.
        c. In the table in paragraph (e), the wording ``ASTM A 302-70a'' is 
    revised to read ``ASTM A 302''.
    
    
    Sec. 179.220-19  [Removed]
    
        68. Section 179.220-19 is removed.
        69. Section 179.221-1 is revised to read as follows:
    
    
    Sec. 179.221-1  Individual specification requirements.
    
        In addition to Sec. 179.220, the individual specification 
    requirements are as follows:
    
    --------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                            Minimum                                                                         
                                                               Bursting      plate         Test                                                  Reference  
          DOT specification \1\             Insulation         pressure    thickness     pressure       Bottom outlet        Bottom washout    (179.221-***)
                                                                (psi)       (inches)      (psi)                                                             
    --------------------------------------------------------------------------------------------------------------------------------------------------------
    115A60ALW........................  Yes.................          240       \3/16\           60  Optional.             Optional...........               
    115A60W1.........................  Yes.................          240        \1/8\           60  Optional............  Optional...........             1 
    115A60W6.........................  Yes.................          240        \1/8\           60  Optional............  Optional...........             1 
    --------------------------------------------------------------------------------------------------------------------------------------------------------
    \1\ Tanks converted to DOT-111A series from existing forge-welded specification, DOT-105A 300, 490, or 500 tanks, by modification using conversion      
      details complying with DOT-111A specification requirements, shall be stenciled by substituting the letter ``F'' for the letter ``W'' in the           
      specification designation.                                                                                                                            
    
    
    [[Page 28682]]
    
    
    
    
    Sec. 179.222  [Removed]
    
        70. Section 179.222 is removed.
    
    
    Sec. 179.222-1  [Removed]
    
        71. Section 179.222-1 is removed.
    
    
    Sec. 179.300-7  [Amended]
    
        72. In Sec. 179.300-7, the following changes are made:
        a. In the table at the end of paragraph (a), the entries for ``ASTM 
    A 285-69'' and ``ASTM A 515-69'' are removed.
        b. Paragraph (b) is removed and reserved.
    
    
    Sec. 179.500-17  [Amended]
    
        73. In Sec. 179.500-17, paragraph (a)(7) is removed.
    
        Issued in Washington, DC, on May 17, 1996, under authority 
    delegated in 49 CFR part 1.
    Rose A. McMurray,
    Acting Deputy Administrator, Research and Special Programs 
    Administration.
    [FR Doc. 96-12954 Filed 6-4-96; 8:45 am]
    BILLING CODE 4910-60-P
    
    

Document Information

Effective Date:
10/1/1996
Published:
06/05/1996
Department:
Research and Special Programs Administration
Entry Type:
Rule
Action:
Final rule.
Document Number:
96-12954
Dates:
Effective date: The effective date of these amendments is October 1, 1996.
Pages:
28666-28682 (17 pages)
Docket Numbers:
Docket No. HM-216, Amdt Nos. 171-144, 172-148, 173-252, 174-83, 178- 115, 179-52
RINs:
2137-AC66: Transportation of Hazardous Materials by Railroad; Miscellaneous Amendments
RIN Links:
https://www.federalregister.gov/regulations/2137-AC66/transportation-of-hazardous-materials-by-railroad-miscellaneous-amendments
PDF File:
96-12954.pdf
CFR: (65)
49 CFR 174.55(a)
49 CFR 172.510(c)
49 CFR 179.200-7(d)
49 CFR 173.31(d)(1)(vi)
49 CFR 171.7
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