Part 179 - SPECIFICATIONS FOR TANK CARS  


Subpart A—Introduction, Approvals and Reports
§ 179.1 General.
§ 179.2 Definitions and abbreviations.
§ 179.3 Procedure for securing approval.
§ 179.4 Changes in specifications for tank cars.
§ 179.5 Certificate of construction.
§ 179.6 Repairs and alterations.
§ 179.7 Quality assurance program.
§ 179.8 Limitation on actions by states, local governments, and Indian tribes.
Subpart B—General Design Requirements
§ 179.10 Tank mounting.
§ 179.11 Welding certification.
§ 179.12 Interior heater systems.
§ 179.13 Tank car capacity and gross weight limitation.
§ 179.14 Coupler vertical restraint system.
§ 179.15 Pressure relief devices.
§ 179.16 Tank-head puncture-resistance systems.
§ 179.18 Thermal protection systems.
§ 179.20 Service equipment; protection systems.
§ 179.22 Marking.
§ 179.24 Stamping.
Subpart C—Specifications for Pressure Tank Car Tanks (Classes DOT-105, 109, 112, 114 and 120)
§ 179.100-1 Tanks built under these specifications shall comply with the requirements of §§179.100, 179.101 and when applicable, §§179.102 and 179.103.
§ 179.100-3 Type.
§ 179.100-4 Insulation.
§ 179.100-6 Thickness of plates.
§ 179.100-7 Materials.
§ 179.100-8 Tank heads.
§ 179.100-9 Welding.
§ 179.100-10 Postweld heat treatment.
§ 179.100-12 Manway nozzle, cover and protective housing.
§ 179.100-13 Venting, loading and unloading valves, measuring and sampling devices.
§ 179.100-14 Bottom outlets.
§ 179.100-16 Attachments.
§ 179.100-17 Closures for openings.
§ 179.100-18 Tests of tanks.
§ 179.100-19 Tests of safety relief valves.
§ 179.100-20 Stamping.
§ 179.100 General specifications applicable to pressure tank car tanks.
§ 179.101 Individual specification requirements applicable to pressure tank car tanks.
§ 179.102 Special commodity requirements for pressure tank car tanks.
§ 179.103 Special requirements for class 114A * * * tank car tanks.
§ 179.101-1 Individual specification requirements.
§ 179.102-1 Carbon dioxide, refrigerated liquid.
§ 179.102-2 Chlorine.
§ 179.102-3 Materials poisonous by inhalation.
§ 179.102-4 Vinyl fluoride, stabilized.
§ 179.102-17 Hydrogen chloride, refrigerated liquid.
§ 179.103-1 Type.
§ 179.103-2 Manway cover.
§ 179.103-3 Venting, loading and unloading valves, measuring and sampling devices.
§ 179.103-4 Safety relief devices and pressure regulators.
§ 179.103-5 Bottom outlets.
Subpart D—Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)
§ 179.200-1 Tank built under these specifications must meet the applicable requirements in this part.
§ 179.220-1 Tanks built under these specifications must meet the requirements of §§179.220 and 179.221.
§ 179.220-3 Type.
§ 179.200-3 Type.
§ 179.220-4 Insulation.
§ 179.200-4 Insulation.
§ 179.220-6 Thickness of plates.
§ 179.200-6 Thickness of plates.
§ 179.220-7 Materials.
§ 179.200-7 Materials.
§ 179.200-8 Tank heads.
§ 179.220-8 Tank heads.
§ 179.220-9 Compartment tanks.
§ 179.200-9 Compartment tanks.
§ 179.220-10 Welding.
§ 179.200-10 Welding.
§ 179.220-11 Postweld heat treatment.
§ 179.200-11 Postweld heat treatment.
§ 179.200-13 Manway ring or flange, pressure relief device flange, bottom outlet nozzle flange, bottom washout nozzle flange and other attachments and openings.
§ 179.220-13 Inner container manway nozzle and cover.
§ 179.220-14 Openings in the tanks.
§ 179.200-14 Expansion capacity.
§ 179.220-15 Support system for inner container.
§ 179.200-15 Closures for manways.
§ 179.200-16 Gauging devices, top loading and unloading devices, venting and air inlet devices.
§ 179.220-16 Expansion capacity.
§ 179.220-17 Gauging devices, top loading and unloading devices, venting and air inlet devices.
§ 179.200-17 Bottom outlets.
§ 179.220-18 Bottom outlets.
§ 179.200-19 Reinforcements, when used, and appurtenances not otherwise specified.
§ 179.220-20 Reinforcements, when used, and appurtenances not otherwise specified.
§ 179.200-21 Closures for openings.
§ 179.220-22 Closure for openings.
§ 179.200-22 Test of tanks.
§ 179.220-23 Test of tanks.
§ 179.200-23 Tests of pressure relief valves.
§ 179.220-24 Tests of pressure relief valves.
§ 179.200-24 Stamping.
§ 179.220-25 Stamping.
§ 179.220-26 Stenciling.
§ 179.200 General specifications applicable to non-pressure tank car tanks (Class DOT-111, DOT-117).
§ 179.201 Individual specification requirements applicable to non-pressure tank car tanks.
§ 179.202 Individual specification requirements applicable to DOT-117 tank car tanks.
§ 179.220 General specifications applicable to nonpressure tank car tanks consisting of an inner container supported within an outer shell (class DOT-115).
§ 179.221 Individual specification requirements applicable to tank car tanks consisting of an inner container supported within an outer shell.
§ 179.221-1 Individual specification requirements.
§ 179.201-1 Individual specification requirements.
§ 179.201-2 [Reserved]
§ 179.201-3 Lined tanks.
§ 179.201-4 Material.
§ 179.201-5 Postweld heat treatment and corrosion resistance.
§ 179.201-6 Manways and manway closures.
§ 179.201-8 Sampling device and thermometer well.
§ 179.201-9 Gauging device.
§ 179.201-10 Water capacity marking.
§ 179.201-11 Insulation.
§ 179.202-1 Applicability.
§ 179.202-2 [Reserved]
§ 179.202-3 Approval to operate at 286,000 gross rail load (GRL).
§ 179.202-4 Thickness of plates.
§ 179.202-5 Tank head puncture resistance system.
§ 179.202-6 Thermal protection system.
§ 179.202-7 Jackets.
§ 179.202-8 Bottom outlets.
§ 179.202-9 Top fittings protection.
§ 179.202-11 Individual specification requirements.
§ 179.202-12 Performance standard requirements (DOT-117P).
§ 179.202-13 Retrofit standard requirements (DOT-117R).
§§ 179.203--179.202-22 [Reserved]
Subpart E—Specifications for Multi-Unit Tank Car Tanks (Classes DOT-106A and 110AW)
§ 179.300-1 Tanks built under these specifications shall meet the requirements of §§179.300 and 179.301.
§ 179.300-3 Type and general requirements.
§ 179.300-4 Insulation.
§ 179.300-6 Thickness of plates.
§ 179.300-7 Materials.
§ 179.300-8 Tank heads.
§ 179.300-9 Welding.
§ 179.300-10 Postweld heat treatment.
§ 179.300-12 Protection of fittings.
§ 179.300-13 Venting, loading and unloading valves.
§ 179.300-14 Attachments not otherwise specified.
§ 179.300-15 Pressure relief devices.
§ 179.300-16 Tests of tanks.
§ 179.300-17 Tests of pressure relief devices.
§ 179.300-18 Stamping.
§ 179.300-19 Inspection.
§ 179.300-20 Reports.
§ 179.300 General specifications applicable to multi-unit tank car tanks designed to be removed from car structure for filling and emptying (Classes DOT-106A and 110AW).
§ 179.301 Individual specification requirements for multi-unit tank car tanks.
§ 179.302 [Reserved]
Subpart F—Specification for Cryogenic Liquid Tank Car Tanks and Seamless Steel Tanks (Classes DOT-113 and 107A)
§ 179.500-1 Tanks built under these specifications shall meet the requirements of §179.500.
§ 179.400-1 General.
§ 179.400-3 Type.
§ 179.500-3 Type and general requirements.
§ 179.400-4 Insulation system and performance standard.
§ 179.500-4 Thickness of wall.
§ 179.500-5 Material.
§ 179.400-5 Materials.
§ 179.400-6 Bursting and buckling pressure.
§ 179.500-6 Heat treatment.
§ 179.500-7 Physical tests.
§ 179.400-7 Tank heads.
§ 179.500-8 Openings in tanks.
§ 179.400-8 Thickness of plates.
§ 179.400-9 Stiffening rings.
§ 179.500-10 Protective housing.
§ 179.400-10 Sump or siphon bowl.
§ 179.500-11 Loading and unloading valves.
§ 179.400-11 Welding.
§ 179.500-12 Pressure relief devices.
§ 179.400-12 Postweld heat treatment.
§ 179.500-13 Fixtures.
§ 179.400-13 Support system for inner tank.
§ 179.500-14 Test of tanks.
§ 179.400-14 Cleaning of inner tank.
§ 179.500-15 Handling of tanks failing in tests.
§ 179.400-15 Radioscopy.
§ 179.500-16 Tests of pressure relief devices.
§ 179.400-16 Access to inner tank.
§ 179.500-17 Marking.
§ 179.400-17 Inner tank piping.
§ 179.500-18 Inspection and reports.
§ 179.400-18 Test of inner tank.
§ 179.400-19 Valves and gages.
§ 179.400-20 Pressure relief devices.
§ 179.400-21 Test of pressure relief valves.
§ 179.400-22 Protective housings.
§ 179.400-23 Operating instructions.
§ 179.400-24 Stamping.
§ 179.400-25 Stenciling.
§ 179.400 General specification applicable to cryogenic liquid tank car tanks.
§ 179.401 Individual specification requirements applicable to inner tanks for cryogenic liquid tank car tanks.
§ 179.500 Specification DOT-107A * * * * seamless steel tank car tanks.
§ 179.401-1 Individual specification requirements.
Appendix A to Part 179—Procedures for Tank-Head Puncture-Resistance Test
Appendix B to Part 179—Procedures for Simulated Pool and Torch-Fire Testing