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 Code of Federal Regulations (Last Updated: April 5, 2024)
 Title 49 - Transportation
 Subtitle B - Other Regulations Relating to Transportation
 Chapter I - Pipeline and Hazardous Materials Safety Administration, Department of Transportation
 Part 179 - Specifications for Tank Cars
 Subpart D - Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)

  § 179.201-1 - Individual specification requirements.  

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  • § 179.201-1 Individual specification requirements.

    In addition to § 179.200, the individual specification requirements are as follows:

    DOT Specification1 Insulation Bursting pressure (psig) Minimum plate
    thickness (inches)     		Test
    pressure (psig)     		Bottom
    outlet     		Bottom
    washout     		References (179.201 - ***)
    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 179.201-11) 500 7⁄16 100 No No 6(a), 8, 10.
    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 § 179.201-3.

    [Amdt. 179-52, 61 FR 28680, June 5, 1996, as amended by 66 FR 45390, Aug. 28, 2001; 68 FR 48571, Aug. 14, 2003]