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Title 49--Transportation
CHAPTER I--PIPELINE AND HAZARDOUS MATERIALS SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION
PART 179--SPECIFICATIONS FOR TANK CARS
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 | 179.1 | General. |
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| 179.2 | Definitions and abbreviations. |
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| 179.3 | Procedure for securing approval. |
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| 179.4 | Changes in specifications for tank cars. |
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| 179.5 | Certificate of construction. |
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| 179.6 | Repairs and alterations. |
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| 179.7 | Quality assurance program. |
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| 179.10 | Tank mounting. |
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| 179.11 | Welding certification. |
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| 179.12 | Interior heater systems. |
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| 179.13 | Tank car capacity and gross weight limitation. |
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| 179.14 | Coupler vertical restraint system. |
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| 179.15 | Pressure relief devices. |
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| 179.16 | Tank-head puncture-resistance systems. |
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| 179.18 | Thermal protection systems. |
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| 179.20 | Service equipment; protection systems. |
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| 179.22 | Marking. |
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| 179.100 | General specifications applicable to pressure tank car tanks. |
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| 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. |
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| 179.100-3 | Type. |
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| 179.100-4 | Insulation. |
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| 179.100-6 | Thickness of plates. |
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| 179.100-7 | Materials. |
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| 179.100-8 | Tank heads. |
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| 179.100-9 | Welding. |
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| 179.100-10 | Postweld heat treatment. |
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| 179.100-12 | Manway nozzle, cover and protective housing. |
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| 179.100-13 | Venting, loading and unloading valves, measuring and sampling devices. |
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| 179.100-14 | Bottom outlets. |
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| 179.100-16 | Attachments. |
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| 179.100-17 | Closures for openings. |
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| 179.100-18 | Tests of tanks. |
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| 179.100-19 | Tests of safety relief valves. |
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| 179.100-20 | Stamping. |
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| 179.101 | Individual specification requirements applicable to pressure tank car tanks. |
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| 179.101-1 | Individual specification requirements. |
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| 179.102 | Special commodity requirements for pressure tank car tanks. |
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| 179.102-1 | Carbon dioxide, refrigerated liquid. |
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| 179.102-2 | Chlorine. |
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| 179.102-4 | Vinyl fluoride, stabilized. |
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| 179.102-17 | Hydrogen chloride, refrigerated liquid. |
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| 179.103 | Special requirements for class 114A *** tank car tanks. |
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| 179.103-1 | Type. |
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| 179.103-2 | Manway cover. |
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| 179.103-3 | Venting, loading and unloading valves, measuring and sampling devices. |
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| 179.103-4 | Safety relief devices and pressure regulators. |
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| 179.103-5 | Bottom outlets. |
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| 179.200 | General specifications applicable to non-pressure tank car tanks (Class DOT-111). |
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| 179.200-1 | Tank built under these specifications must meet the requirements of 179.200, and 179.201. |
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| 179.200-3 | Type. |
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| 179.200-4 | Insulation. |
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| 179.200-6 | Thickness of plates. |
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| 179.200-7 | Materials. |
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| 179.200-8 | Tank heads. |
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| 179.200-9 | Compartment tanks. |
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| 179.200-10 | Welding. |
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| 179.200-11 | Postweld heat treatment. |
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| 179.200-13 | Manway ring or flange, pressure relief device flange, bottom outlet nozzle flange, bottom washout nozzle flange and other attachments and openings. |
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| 179.200-14 | Expansion capacity. |
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| 179.200-15 | Closures for manways. |
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| 179.200-16 | Gauging devices, top loading and unloading devices, venting and air inlet devices. |
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| 179.200-17 | Bottom outlets. |
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| 179.200-19 | Reinforcements, when used, and appurtenances not otherwise specified. |
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| 179.200-21 | Closures for openings. |
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| 179.200-22 | Test of tanks. |
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| 179.200-23 | Tests of pressure relief valves. |
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| 179.200-24 | Stamping. |
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| 179.201 | Individual specification requirements applicable to non-pressure tank car tanks. |
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| 179.201-1 | Individual specification requirements. |
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| 179.201-3 | Lined tanks. |
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| 179.201-4 | Material. |
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| 179.201-5 | Postweld heat treatment and corrosion resistance. |
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| 179.201-6 | Manways and manway closures. |
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| 179.201-8 | Sampling device and thermometer well. |
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| 179.201-9 | Gauging device. |
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| 179.201-10 | Water capacity marking. |
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| 179.201-11 | Insulation. |
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| 179.220 | General specifications applicable to nonpressure tank car tanks consisting of an inner container supported within an outer shell (class DOT-115). |
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| 179.220-1 | Tanks built under these specifications must meet the requirements of 179.220 and 179.221. |
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| 179.220-3 | Type. |
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| 179.220-4 | Insulation. |
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| 179.220-6 | Thickness of plates. |
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| 179.220-7 | Materials. |
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| 179.220-8 | Tank heads. |
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| 179.220-9 | Compartment tanks. |
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| 179.220-10 | Welding. |
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| 179.220-11 | Postweld heat treatment. |
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| 179.220-13 | Inner container manway nozzle and cover. |
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| 179.220-14 | Openings in the tanks. |
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| 179.220-15 | Support system for inner container. |
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| 179.220-16 | Expansion capacity. |
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| 179.220-17 | Gauging devices, top loading and unloading devices, venting and air inlet devices. |
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| 179.220-18 | Bottom outlets. |
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| 179.220-20 | Reinforcements, when used, and appurtenances not otherwise specified. |
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| 179.220-22 | Closure for openings. |
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| 179.220-23 | Test of tanks. |
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| 179.220-24 | Tests of pressure relief valves. |
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| 179.220-25 | Stamping. |
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| 179.220-26 | Stenciling. |
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| 179.221 | Individual specification requirements applicable to tank car tanks consisting of an inner container supported within an outer shell. |
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| 179.221-1 | Individual specification requirements. |
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| 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). |
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| 179.300-1 | Tanks built under these specifications shall meet the requirements of 179.300 and 179.301. |
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| 179.300-3 | Type and general requirements. |
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| 179.300-4 | Insulation. |
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| 179.300-6 | Thickness of plates. |
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| 179.300-7 | Materials. |
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| 179.300-8 | Tank heads. |
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| 179.300-9 | Welding. |
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| 179.300-10 | Postweld heat treatment. |
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| 179.300-12 | Protection of fittings. |
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| 179.300-13 | Venting, loading and unloading valves. |
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| 179.300-14 | Attachments not otherwise specified. |
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| 179.300-15 | Pressure relief devices. |
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| 179.300-16 | Tests of tanks. |
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| 179.300-17 | Tests of pressure relief devices. |
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| 179.300-18 | Stamping. |
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| 179.300-19 | Inspection. |
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| 179.300-20 | Reports. |
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| 179.301 | Individual specification requirements for multi-unit tank car tanks. |
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| 179.400 | General specification applicable to cryogenic liquid tank car tanks. |
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| 179.400-1 | General. |
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| 179.400-3 | Type. |
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| 179.400-4 | Insulation system and performance standard. |
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| 179.400-5 | Materials. |
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| 179.400-6 | Bursting and buckling pressure. |
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| 179.400-7 | Tank heads. |
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| 179.400-8 | Thickness of plates. |
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| 179.400-9 | Stiffening rings. |
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| 179.400-10 | Sump or siphon bowl. |
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| 179.400-11 | Welding. |
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| 179.400-12 | Postweld heat treatment. |
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| 179.400-13 | Support system for inner tank. |
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| 179.400-14 | Cleaning of inner tank. |
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| 179.400-15 | Radioscopy. |
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| 179.400-16 | Access to inner tank. |
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| 179.400-17 | Inner tank piping. |
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| 179.400-18 | Test of inner tank. |
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| 179.400-19 | Valves and gages. |
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| 179.400-20 | Pressure relief devices. |
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| 179.400-21 | Test of pressure relief valves. |
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| 179.400-22 | Protective housings. |
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| 179.400-23 | Operating instructions. |
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| 179.400-24 | Stamping. |
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| 179.400-25 | Stenciling. |
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| 179.401 | Individual specification requirements applicable to inner tanks for cryogenic liquid tank car tanks. |
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| 179.401-1 | Individual specification requirements. |
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| 179.500 | Specification DOT-107A * * * * seamless steel tank car tanks. |
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| 179.500-1 | Tanks built under these specifications shall meet the requirements of 179.500. |
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| 179.500-3 | Type and general requirements. |
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| 179.500-4 | Thickness of wall. |
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| 179.500-5 | Material. |
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| 179.500-6 | Heat treatment. |
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| 179.500-7 | Physical tests. |
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| 179.500-8 | Openings in tanks. |
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| 179.500-10 | Protective housing. |
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| 179.500-11 | Loading and unloading valves. |
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| 179.500-12 | Pressure relief devices. |
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| 179.500-13 | Fixtures. |
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| 179.500-14 | Test of tanks. |
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| 179.500-15 | Handling of tanks failing in tests. |
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| 179.500-16 | Tests of pressure relief devices. |
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| 179.500-17 | Marking. |
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| 179.500-18 | Inspection and reports. |
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