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FEDERAL · 49 CFR

Part 179 — Specifications for Tank Cars

183 sections · Title 49: Transportation

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