Title 49

PART 179

Part 179 - Specifications For Tank Cars

PART 179 - SPECIFICATIONS FOR TANK CARS Authority:49 U.S.C. 5101-5128; 49 CFR 1.81 and 1.97. Source:29 FR 18995, Dec. 29, 1964, unless otherwise noted. Redesignated at 32 FR 5606, Apr. 5, 1967.

49:3.1.1.1.2.1SUBPART A
Subpart A - Introduction, Approvals and Reports
49:3.1.1.1.2.1.1.1SECTION 179.1
   179.1 General.
49:3.1.1.1.2.1.1.2SECTION 179.2
   179.2 Definitions and abbreviations.
49:3.1.1.1.2.1.1.3SECTION 179.3
   179.3 Procedure for securing approval.
49:3.1.1.1.2.1.1.4SECTION 179.4
   179.4 Changes in specifications for tank cars.
49:3.1.1.1.2.1.1.5SECTION 179.5
   179.5 Certificate of construction.
49:3.1.1.1.2.1.1.6SECTION 179.6
   179.6 Repairs and alterations.
49:3.1.1.1.2.1.1.7SECTION 179.7
   179.7 Quality assurance program.
49:3.1.1.1.2.1.1.8SECTION 179.8
   179.8 Limitation on actions by states, local governments, and Indian tribes.
49:3.1.1.1.2.2SUBPART B
Subpart B - General Design Requirements
49:3.1.1.1.2.2.1.1SECTION 179.10
   179.10 Tank mounting.
49:3.1.1.1.2.2.1.2SECTION 179.11
   179.11 Welding certification.
49:3.1.1.1.2.2.1.3SECTION 179.12
   179.12 Interior heater systems.
49:3.1.1.1.2.2.1.4SECTION 179.13
   179.13 Tank car capacity and gross weight limitation.
49:3.1.1.1.2.2.1.5SECTION 179.14
   179.14 Coupler vertical restraint system.
49:3.1.1.1.2.2.1.6SECTION 179.15
   179.15 Pressure relief devices.
49:3.1.1.1.2.2.1.7SECTION 179.16
   179.16 Tank-head puncture-resistance systems.
49:3.1.1.1.2.2.1.8SECTION 179.18
   179.18 Thermal protection systems.
49:3.1.1.1.2.2.1.9SECTION 179.20
   179.20 Service equipment; protection systems.
49:3.1.1.1.2.2.1.10SECTION 179.22
   179.22 Marking.
49:3.1.1.1.2.2.1.11SECTION 179.24
   179.24 Stamping.
49:3.1.1.1.2.3SUBPART C
Subpart C - Specifications for Pressure Tank Car Tanks (Classes DOT-105, 109, 112, 114 and 120)
49:3.1.1.1.2.3.1.1SECTION 179.100
   179.100 General specifications applicable to pressure tank car tanks.
49:3.1.1.1.2.3.1.2SECTION 179.100-1
   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.
49:3.1.1.1.2.3.1.3SECTION 179.100-3
   179.100-3 Type.
49:3.1.1.1.2.3.1.4SECTION 179.100-4
   179.100-4 Insulation.
49:3.1.1.1.2.3.1.5SECTION 179.100-6
   179.100-6 Thickness of plates.
49:3.1.1.1.2.3.1.6SECTION 179.100-7
   179.100-7 Materials.
49:3.1.1.1.2.3.1.7SECTION 179.100-8
   179.100-8 Tank heads.
49:3.1.1.1.2.3.1.8SECTION 179.100-9
   179.100-9 Welding.
49:3.1.1.1.2.3.1.9SECTION 179.100-10
   179.100-10 Postweld heat treatment.
49:3.1.1.1.2.3.1.10SECTION 179.100-12
   179.100-12 Manway nozzle, cover and protective housing.
49:3.1.1.1.2.3.1.11SECTION 179.100-13
   179.100-13 Venting, loading and unloading valves, measuring and sampling devices.
49:3.1.1.1.2.3.1.12SECTION 179.100-14
   179.100-14 Bottom outlets.
49:3.1.1.1.2.3.1.13SECTION 179.100-16
   179.100-16 Attachments.
49:3.1.1.1.2.3.1.14SECTION 179.100-17
   179.100-17 Closures for openings.
49:3.1.1.1.2.3.1.15SECTION 179.100-18
   179.100-18 Tests of tanks.
49:3.1.1.1.2.3.1.16SECTION 179.100-19
   179.100-19 Tests of safety relief valves.
49:3.1.1.1.2.3.1.17SECTION 179.100-20
   179.100-20 Stamping.
49:3.1.1.1.2.3.1.18SECTION 179.101
   179.101 Individual specification requirements applicable to pressure tank car tanks.
49:3.1.1.1.2.3.1.19SECTION 179.101-1
   179.101-1 Individual specification requirements.
49:3.1.1.1.2.3.1.20SECTION 179.102
   179.102 Special commodity requirements for pressure tank car tanks.
49:3.1.1.1.2.3.1.21SECTION 179.102-1
   179.102-1 Carbon dioxide, refrigerated liquid.
49:3.1.1.1.2.3.1.22SECTION 179.102-2
   179.102-2 Chlorine.
49:3.1.1.1.2.3.1.23SECTION 179.102-3
   179.102-3 Materials poisonous by inhalation.
49:3.1.1.1.2.3.1.24SECTION 179.102-4
   179.102-4 Vinyl fluoride, stabilized.
49:3.1.1.1.2.3.1.25SECTION 179.102-17
   179.102-17 Hydrogen chloride, refrigerated liquid.
49:3.1.1.1.2.3.1.26SECTION 179.103
   179.103 Special requirements for class 114A * * * tank car tanks.
49:3.1.1.1.2.3.1.27SECTION 179.103-1
   179.103-1 Type.
49:3.1.1.1.2.3.1.28SECTION 179.103-2
   179.103-2 Manway cover.
49:3.1.1.1.2.3.1.29SECTION 179.103-3
   179.103-3 Venting, loading and unloading valves, measuring and sampling devices.
49:3.1.1.1.2.3.1.30SECTION 179.103-4
   179.103-4 Safety relief devices and pressure regulators.
49:3.1.1.1.2.3.1.31SECTION 179.103-5
   179.103-5 Bottom outlets.
49:3.1.1.1.2.4SUBPART D
Subpart D - Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)
49:3.1.1.1.2.4.1.1SECTION 179.200
   179.200 General specifications applicable to non-pressure tank car tanks (Class DOT-111, DOT-117).
49:3.1.1.1.2.4.1.2SECTION 179.200-1
   179.200-1 Tank built under these specifications must meet the applicable requirements in this part.
49:3.1.1.1.2.4.1.3SECTION 179.200-3
   179.200-3 Type.
49:3.1.1.1.2.4.1.4SECTION 179.200-4
   179.200-4 Insulation.
49:3.1.1.1.2.4.1.5SECTION 179.200-6
   179.200-6 Thickness of plates.
49:3.1.1.1.2.4.1.6SECTION 179.200-7
   179.200-7 Materials.
49:3.1.1.1.2.4.1.7SECTION 179.200-8
   179.200-8 Tank heads.
49:3.1.1.1.2.4.1.8SECTION 179.200-9
   179.200-9 Compartment tanks.
49:3.1.1.1.2.4.1.9SECTION 179.200-10
   179.200-10 Welding.
49:3.1.1.1.2.4.1.10SECTION 179.200-11
   179.200-11 Postweld heat treatment.
49:3.1.1.1.2.4.1.11SECTION 179.200-13
   179.200-13 Manway ring or flange, pressure relief device flange, bottom outlet nozzle flange, bottom washout nozzle flange and other attachments and openings.
49:3.1.1.1.2.4.1.12SECTION 179.200-14
   179.200-14 Expansion capacity.
49:3.1.1.1.2.4.1.13SECTION 179.200-15
   179.200-15 Closures for manways.
49:3.1.1.1.2.4.1.14SECTION 179.200-16
   179.200-16 Gauging devices, top loading and unloading devices, venting and air inlet devices.
49:3.1.1.1.2.4.1.15SECTION 179.200-17
   179.200-17 Bottom outlets.
49:3.1.1.1.2.4.1.16SECTION 179.200-19
   179.200-19 Reinforcements, when used, and appurtenances not otherwise specified.
49:3.1.1.1.2.4.1.17SECTION 179.200-21
   179.200-21 Closures for openings.
49:3.1.1.1.2.4.1.18SECTION 179.200-22
   179.200-22 Test of tanks.
49:3.1.1.1.2.4.1.19SECTION 179.200-23
   179.200-23 Tests of pressure relief valves.
49:3.1.1.1.2.4.1.20SECTION 179.200-24
   179.200-24 Stamping.
49:3.1.1.1.2.4.1.21SECTION 179.201
   179.201 Individual specification requirements applicable to non-pressure tank car tanks.
49:3.1.1.1.2.4.1.22SECTION 179.201-1
   179.201-1 Individual specification requirements.
49:3.1.1.1.2.4.1.23SECTION 179.201-2
   179.201-2 [Reserved]
49:3.1.1.1.2.4.1.24SECTION 179.201-3
   179.201-3 Lined tanks.
49:3.1.1.1.2.4.1.25SECTION 179.201-4
   179.201-4 Material.
49:3.1.1.1.2.4.1.26SECTION 179.201-5
   179.201-5 Postweld heat treatment and corrosion resistance.
49:3.1.1.1.2.4.1.27SECTION 179.201-6
   179.201-6 Manways and manway closures.
49:3.1.1.1.2.4.1.28SECTION 179.201-8
   179.201-8 Sampling device and thermometer well.
49:3.1.1.1.2.4.1.29SECTION 179.201-9
   179.201-9 Gauging device.
49:3.1.1.1.2.4.1.30SECTION 179.201-10
   179.201-10 Water capacity marking.
49:3.1.1.1.2.4.1.31SECTION 179.201-11
   179.201-11 Insulation.
49:3.1.1.1.2.4.1.32SECTION 179.202
   179.202 Individual specification requirements applicable to DOT-117 tank car tanks.
49:3.1.1.1.2.4.1.33SECTION 179.202-1
   179.202-1 Applicability.
49:3.1.1.1.2.4.1.34SECTION 179.202-2
   179.202-2 [Reserved]
49:3.1.1.1.2.4.1.35SECTION 179.202-3
   179.202-3 Approval to operate at 286,000 gross rail load (GRL).
49:3.1.1.1.2.4.1.36SECTION 179.202-4
   179.202-4 Thickness of plates.
49:3.1.1.1.2.4.1.37SECTION 179.202-5
   179.202-5 Tank head puncture resistance system.
49:3.1.1.1.2.4.1.38SECTION 179.202-6
   179.202-6 Thermal protection system.
49:3.1.1.1.2.4.1.39SECTION 179.202-7
   179.202-7 Jackets.
49:3.1.1.1.2.4.1.40SECTION 179.202-8
   179.202-8 Bottom outlets.
49:3.1.1.1.2.4.1.41SECTION 179.202-9
   179.202-9 Top fittings protection.
49:3.1.1.1.2.4.1.42SECTION 179.202-11
   179.202-11 Individual specification requirements.
49:3.1.1.1.2.4.1.43SECTION 179.202-12
   179.202-12 Performance standard requirements (DOT-117P).
49:3.1.1.1.2.4.1.44SECTION 179.202-13
   179.202-13 Retrofit standard requirements (DOT-117R).
49:3.1.1.1.2.4.1.45SECTION 179.203 - 179.202-22
   179.203--179.202-22 [Reserved]
49:3.1.1.1.2.4.1.46SECTION 179.220
   179.220 General specifications applicable to nonpressure tank car tanks consisting of an inner container supported within an outer shell (class DOT-115).
49:3.1.1.1.2.4.1.47SECTION 179.220-1
   179.220-1 Tanks built under these specifications must meet the requirements of §§ 179.220 and 179.221.
49:3.1.1.1.2.4.1.48SECTION 179.220-3
   179.220-3 Type.
49:3.1.1.1.2.4.1.49SECTION 179.220-4
   179.220-4 Insulation.
49:3.1.1.1.2.4.1.50SECTION 179.220-6
   179.220-6 Thickness of plates.
49:3.1.1.1.2.4.1.51SECTION 179.220-7
   179.220-7 Materials.
49:3.1.1.1.2.4.1.52SECTION 179.220-8
   179.220-8 Tank heads.
49:3.1.1.1.2.4.1.53SECTION 179.220-9
   179.220-9 Compartment tanks.
49:3.1.1.1.2.4.1.54SECTION 179.220-10
   179.220-10 Welding.
49:3.1.1.1.2.4.1.55SECTION 179.220-11
   179.220-11 Postweld heat treatment.
49:3.1.1.1.2.4.1.56SECTION 179.220-13
   179.220-13 Inner container manway nozzle and cover.
49:3.1.1.1.2.4.1.57SECTION 179.220-14
   179.220-14 Openings in the tanks.
49:3.1.1.1.2.4.1.58SECTION 179.220-15
   179.220-15 Support system for inner container.
49:3.1.1.1.2.4.1.59SECTION 179.220-16
   179.220-16 Expansion capacity.
49:3.1.1.1.2.4.1.60SECTION 179.220-17
   179.220-17 Gauging devices, top loading and unloading devices, venting and air inlet devices.
49:3.1.1.1.2.4.1.61SECTION 179.220-18
   179.220-18 Bottom outlets.
49:3.1.1.1.2.4.1.62SECTION 179.220-20
   179.220-20 Reinforcements, when used, and appurtenances not otherwise specified.
49:3.1.1.1.2.4.1.63SECTION 179.220-22
   179.220-22 Closure for openings.
49:3.1.1.1.2.4.1.64SECTION 179.220-23
   179.220-23 Test of tanks.
49:3.1.1.1.2.4.1.65SECTION 179.220-24
   179.220-24 Tests of pressure relief valves.
49:3.1.1.1.2.4.1.66SECTION 179.220-25
   179.220-25 Stamping.
49:3.1.1.1.2.4.1.67SECTION 179.220-26
   179.220-26 Stenciling.
49:3.1.1.1.2.4.1.68SECTION 179.221
   179.221 Individual specification requirements applicable to tank car tanks consisting of an inner container supported within an outer shell.
49:3.1.1.1.2.4.1.69SECTION 179.221-1
   179.221-1 Individual specification requirements.
49:3.1.1.1.2.5SUBPART E
Subpart E - Specifications for Multi-Unit Tank Car Tanks (Classes DOT-106A and 110AW)
49:3.1.1.1.2.5.1.1SECTION 179.300
   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).
49:3.1.1.1.2.5.1.2SECTION 179.300-1
   179.300-1 Tanks built under these specifications shall meet the requirements of §§ 179.300 and 179.301.
49:3.1.1.1.2.5.1.3SECTION 179.300-3
   179.300-3 Type and general requirements.
49:3.1.1.1.2.5.1.4SECTION 179.300-4
   179.300-4 Insulation.
49:3.1.1.1.2.5.1.5SECTION 179.300-6
   179.300-6 Thickness of plates.
49:3.1.1.1.2.5.1.6SECTION 179.300-7
   179.300-7 Materials.
49:3.1.1.1.2.5.1.7SECTION 179.300-8
   179.300-8 Tank heads.
49:3.1.1.1.2.5.1.8SECTION 179.300-9
   179.300-9 Welding.
49:3.1.1.1.2.5.1.9SECTION 179.300-10
   179.300-10 Postweld heat treatment.
49:3.1.1.1.2.5.1.10SECTION 179.300-12
   179.300-12 Protection of fittings.
49:3.1.1.1.2.5.1.11SECTION 179.300-13
   179.300-13 Venting, loading and unloading valves.
49:3.1.1.1.2.5.1.12SECTION 179.300-14
   179.300-14 Attachments not otherwise specified.
49:3.1.1.1.2.5.1.13SECTION 179.300-15
   179.300-15 Pressure relief devices.
49:3.1.1.1.2.5.1.14SECTION 179.300-16
   179.300-16 Tests of tanks.
49:3.1.1.1.2.5.1.15SECTION 179.300-17
   179.300-17 Tests of pressure relief devices.
49:3.1.1.1.2.5.1.16SECTION 179.300-18
   179.300-18 Stamping.
49:3.1.1.1.2.5.1.17SECTION 179.300-19
   179.300-19 Inspection.
49:3.1.1.1.2.5.1.18SECTION 179.300-20
   179.300-20 Reports.
49:3.1.1.1.2.5.1.19SECTION 179.301
   179.301 Individual specification requirements for multi-unit tank car tanks.
49:3.1.1.1.2.5.1.20SECTION 179.302
   179.302 [Reserved]
49:3.1.1.1.2.6SUBPART F
Subpart F - Specification for Cryogenic Liquid Tank Car Tanks and Seamless Steel Tanks (Classes DOT-113 and 107A)
49:3.1.1.1.2.6.1.1SECTION 179.400
   179.400 General specification applicable to cryogenic liquid tank car tanks.
49:3.1.1.1.2.6.1.2SECTION 179.400-1
   179.400-1 General.
49:3.1.1.1.2.6.1.3SECTION 179.400-3
   179.400-3 Type.
49:3.1.1.1.2.6.1.4SECTION 179.400-4
   179.400-4 Insulation system and performance standard.
49:3.1.1.1.2.6.1.5SECTION 179.400-5
   179.400-5 Materials.
49:3.1.1.1.2.6.1.6SECTION 179.400-6
   179.400-6 Bursting and buckling pressure.
49:3.1.1.1.2.6.1.7SECTION 179.400-7
   179.400-7 Tank heads.
49:3.1.1.1.2.6.1.8SECTION 179.400-8
   179.400-8 Thickness of plates.
49:3.1.1.1.2.6.1.9SECTION 179.400-9
   179.400-9 Stiffening rings.
49:3.1.1.1.2.6.1.10SECTION 179.400-10
   179.400-10 Sump or siphon bowl.
49:3.1.1.1.2.6.1.11SECTION 179.400-11
   179.400-11 Welding.
49:3.1.1.1.2.6.1.12SECTION 179.400-12
   179.400-12 Postweld heat treatment.
49:3.1.1.1.2.6.1.13SECTION 179.400-13
   179.400-13 Support system for inner tank.
49:3.1.1.1.2.6.1.14SECTION 179.400-14
   179.400-14 Cleaning of inner tank.
49:3.1.1.1.2.6.1.15SECTION 179.400-15
   179.400-15 Radioscopy.
49:3.1.1.1.2.6.1.16SECTION 179.400-16
   179.400-16 Access to inner tank.
49:3.1.1.1.2.6.1.17SECTION 179.400-17
   179.400-17 Inner tank piping.
49:3.1.1.1.2.6.1.18SECTION 179.400-18
   179.400-18 Test of inner tank.
49:3.1.1.1.2.6.1.19SECTION 179.400-19
   179.400-19 Valves and gages.
49:3.1.1.1.2.6.1.20SECTION 179.400-20
   179.400-20 Pressure relief devices.
49:3.1.1.1.2.6.1.21SECTION 179.400-21
   179.400-21 Test of pressure relief valves.
49:3.1.1.1.2.6.1.22SECTION 179.400-22
   179.400-22 Protective housings.
49:3.1.1.1.2.6.1.23SECTION 179.400-23
   179.400-23 Operating instructions.
49:3.1.1.1.2.6.1.24SECTION 179.400-24
   179.400-24 Stamping.
49:3.1.1.1.2.6.1.25SECTION 179.400-25
   179.400-25 Stenciling.
49:3.1.1.1.2.6.1.26SECTION 179.400-26
   179.400-26 Approval to operate at 286,000 gross rail load (GRL).
49:3.1.1.1.2.6.1.27SECTION 179.401
   179.401 Individual specification requirements applicable to inner tanks for cryogenic liquid tank car tanks.
49:3.1.1.1.2.6.1.28SECTION 179.401-1
   179.401-1 Individual specification requirements.
49:3.1.1.1.2.6.1.29SECTION 179.500
   179.500 Specification DOT-107A * * * * seamless steel tank car tanks.
49:3.1.1.1.2.6.1.30SECTION 179.500-1
   179.500-1 Tanks built under these specifications shall meet the requirements of § 179.500.
49:3.1.1.1.2.6.1.31SECTION 179.500-3
   179.500-3 Type and general requirements.
49:3.1.1.1.2.6.1.32SECTION 179.500-4
   179.500-4 Thickness of wall.
49:3.1.1.1.2.6.1.33SECTION 179.500-5
   179.500-5 Material.
49:3.1.1.1.2.6.1.34SECTION 179.500-6
   179.500-6 Heat treatment.
49:3.1.1.1.2.6.1.35SECTION 179.500-7
   179.500-7 Physical tests.
49:3.1.1.1.2.6.1.36SECTION 179.500-8
   179.500-8 Openings in tanks.
49:3.1.1.1.2.6.1.37SECTION 179.500-10
   179.500-10 Protective housing.
49:3.1.1.1.2.6.1.38SECTION 179.500-11
   179.500-11 Loading and unloading valves.
49:3.1.1.1.2.6.1.39SECTION 179.500-12
   179.500-12 Pressure relief devices.
49:3.1.1.1.2.6.1.40SECTION 179.500-13
   179.500-13 Fixtures.
49:3.1.1.1.2.6.1.41SECTION 179.500-14
   179.500-14 Test of tanks.
49:3.1.1.1.2.6.1.42SECTION 179.500-15
   179.500-15 Handling of tanks failing in tests.
49:3.1.1.1.2.6.1.43SECTION 179.500-16
   179.500-16 Tests of pressure relief devices.
49:3.1.1.1.2.6.1.44SECTION 179.500-17
   179.500-17 Marking.
49:3.1.1.1.2.6.1.45SECTION 179.500-18
   179.500-18 Inspection and reports.
49:3.1.1.1.2.7SUBPART 0
49:3.1.1.1.2.8.1.1.7APPENDIX Appendix A
   Appendix A to Part 179 - Procedures for Tank-Head Puncture-Resistance Test
49:3.1.1.1.2.8.1.1.8APPENDIX Appendix B
   Appendix B to Part 179 - Procedures for Simulated Pool and Torch-Fire Testing