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.

§ 179.200-3 - Type.

§ 179.220-3 - Type.

§ 179.200-4 - Insulation.

§ 179.220-4 - Insulation.

§ 179.200-6 - Thickness of plates.

§ 179.220-6 - Thickness of plates.

§ 179.200-7 - Materials.

§ 179.220-7 - Materials.

§ 179.200-8 - Tank heads.

§ 179.220-8 - Tank heads.

§ 179.200-9 - Compartment tanks.

§ 179.220-9 - Compartment tanks.

§ 179.200-10 - Welding.

§ 179.220-10 - Welding.

§ 179.200-11 - Postweld heat treatment.

§ 179.220-11 - 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.

§ 179.200-14 - Expansion capacity.

§ 179.220-14 - Openings in the tanks.

§ 179.200-15 - Closures for manways.

§ 179.220-15 - Support system for inner container.

§ 179.200-16 - Gauging devices, top loading and unloading devices, venting and air inlet devices.

§ 179.220-16 - Expansion capacity.

§ 179.200-17 - Bottom outlets.

§ 179.220-17 - Gauging devices, top loading and unloading devices, venting and air inlet devices.

§ 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.

§ 179.200-22 - Test of tanks.

§ 179.220-22 - Closure for openings.

§ 179.200-23 - Tests of pressure relief valves.

§ 179.220-23 - Test of tanks.

§ 179.200-24 - Stamping.

§ 179.220-24 - Tests of pressure relief valves.

§ 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.

§ 179.201-1 - Individual specification requirements.

§ 179.221-1 - 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.

§ 179.102-10 - ECP brakes.

§ 179.202-10 - xxx

§ 179.202-11 - Individual specification requirements.

§ 179.202-12 - Performance standard requirements (DOT-117P).

§ 179.202-13 - Retrofit standard requirements (DOT-117R).

§§ 179.202--179.202-22 - [Reserved]

§§ 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)

§ 179.400-1 - General.

§ 179.500-1 - Tanks built under these specifications shall meet the requirements of § 179.500.

§ 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.

§ 179.400-5 - Materials.

§ 179.500-5 - Material.

§ 179.400-6 - Bursting and buckling pressure.

§ 179.500-6 - Heat treatment.

§ 179.400-7 - Tank heads.

§ 179.500-7 - Physical tests.

§ 179.400-8 - Thickness of plates.

§ 179.500-8 - Openings in tanks.

§ 179.400-9 - Stiffening rings.

§ 179.400-10 - Sump or siphon bowl.

§ 179.500-10 - Protective housing.

§ 179.400-11 - Welding.

§ 179.500-11 - Loading and unloading valves.

§ 179.400-12 - Postweld heat treatment.

§ 179.500-12 - Pressure relief devices.

§ 179.400-13 - Support system for inner tank.

§ 179.500-13 - Fixtures.

§ 179.400-14 - Cleaning of inner tank.

§ 179.500-14 - Test of tanks.

§ 179.400-15 - Radioscopy.

§ 179.500-15 - Handling of tanks failing in tests.

§ 179.400-16 - Access to inner tank.

§ 179.500-16 - Tests of pressure relief devices.

§ 179.400-17 - Inner tank piping.

§ 179.500-17 - Marking.

§ 179.400-18 - Test of inner tank.

§ 179.500-18 - Inspection and reports.

§ 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.

§ 179.400-26 - xxx

§ 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