Title 49, Part 179 — Specifications for Tank Cars

Section 179.1

General.

Section 179.2

Definitions and abbreviations.

Section 179.3

Procedure for securing approval.

Section 179.4

Changes in specifications for tank cars.

Section 179.5

Certificate of construction.

Section 179.6

Repairs and alterations.

Section 179.7

Quality assurance program.

Section 179.8

Limitation on actions by states, local governments, and Indian tribes.

Section 179.10

Tank mounting.

Section 179.11

Welding certification.

Section 179.12

Interior heater systems.

Section 179.13

Tank car capacity and gross weight limitation.

Section 179.14

Coupler vertical restraint system.

Section 179.15

Pressure relief devices.

Section 179.16

Tank-head puncture-resistance systems.

Section 179.18

Thermal protection systems.

Section 179.20

Service equipment; protection systems.

Section 179.22

Marking.

Section 179.24

Stamping.

Section 179.100

General specifications applicable to pressure tank car tanks.

Section 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.

Section 179.100-3

Type.

Section 179.100-4

Insulation.

Section 179.100-6

Thickness of plates.

Section 179.100-7

Materials.

Section 179.100-8

Tank heads.

Section 179.100-9

Welding.

Section 179.100-10

Postweld heat treatment.

Section 179.100-12

Manway nozzle, cover and protective housing.

Section 179.100-13

Venting, loading and unloading valves, measuring and sampling devices.

Section 179.100-14

Bottom outlets.

Section 179.100-16

Attachments.

Section 179.100-17

Closures for openings.

Section 179.100-18

Tests of tanks.

Section 179.100-19

Tests of safety relief valves.

Section 179.100-20

Stamping.

Section 179.101

Individual specification requirements applicable to pressure tank car tanks.

Section 179.101-1

Individual specification requirements.

Section 179.102

Special commodity requirements for pressure tank car tanks.

Section 179.102-1

Carbon dioxide, refrigerated liquid.

Section 179.102-2

Chlorine.

Section 179.102-3

Materials poisonous by inhalation.

Section 179.102-4

Vinyl fluoride, stabilized.

Section 179.102-17

Hydrogen chloride, refrigerated liquid.

Section 179.103

Special requirements for class 114A * * * tank car tanks.

Section 179.103-1

Type.

Section 179.103-2

Manway cover.

Section 179.103-3

Venting, loading and unloading valves, measuring and sampling devices.

Section 179.103-4

Safety relief devices and pressure regulators.

Section 179.103-5

Bottom outlets.

Section 179.200

General specifications applicable to non-pressure tank car tanks (Class DOT-111, DOT-117).

Section 179.200-1

Tank built under these specifications must meet the applicable requirements in this part.

Section 179.200-3

Type.

Section 179.200-4

Insulation.

Section 179.200-6

Thickness of plates.

Section 179.200-7

Materials.

Section 179.200-8

Tank heads.

Section 179.200-9

Compartment tanks.

Section 179.200-10

Welding.

Section 179.200-11

Postweld heat treatment.

Section 179.200-13

Manway ring or flange, pressure relief device flange, bottom outlet nozzle flange, bottom washout nozzle flange and other attachments and openings.

Section 179.200-14

Expansion capacity.

Section 179.200-15

Closures for manways.

Section 179.200-16

Gauging devices, top loading and unloading devices, venting and air inlet devices.

Section 179.200-17

Bottom outlets.

Section 179.200-19

Reinforcements, when used, and appurtenances not otherwise specified.

Section 179.200-21

Closures for openings.

Section 179.200-22

Test of tanks.

Section 179.200-23

Tests of pressure relief valves.

Section 179.200-24

Stamping.

Section 179.201

Individual specification requirements applicable to non-pressure tank car tanks.

Section 179.201-1

Individual specification requirements.

Section 179.201-2

[Reserved]

Section 179.201-3

Lined tanks.

Section 179.201-4

Material.

Section 179.201-5

Postweld heat treatment and corrosion resistance.

Section 179.201-6

Manways and manway closures.

Section 179.201-8

Sampling device and thermometer well.

Section 179.201-9

Gauging device.

Section 179.201-10

Water capacity marking.

Section 179.201-11

Insulation.

Section 179.202

Individual specification requirements applicable to DOT-117 tank car tanks.

Section 179.202-1

Applicability.

Section 179.202-2

[Reserved]

Section 179.202-3

Approval to operate at 286,000 gross rail load (GRL).

Section 179.202-4

Thickness of plates.

Section 179.202-5

Tank head puncture resistance system.

Section 179.202-6

Thermal protection system.

Section 179.202-7

Jackets.

Section 179.202-8

Bottom outlets.

Section 179.202-9

Top fittings protection.

Section 179.202-11

Individual specification requirements.

Section 179.202-12

Performance standard requirements (DOT-117P).

Section 179.202-13

Retrofit standard requirements (DOT-117R).

Section 179.203-179.202-22

§§ 179.203-179.202-22 [Reserved]

Section 179.220

General specifications applicable to nonpressure tank car tanks consisting of an inner container supported within an outer shell (class DOT-115).

Section 179.220-1

Tanks built under these specifications must meet the requirements of §§ 179.220 and 179.221.

Section 179.220-3

Type.

Section 179.220-4

Insulation.

Section 179.220-6

Thickness of plates.

Section 179.220-7

Materials.

Section 179.220-8

Tank heads.

Section 179.220-9

Compartment tanks.

Section 179.220-10

Welding.

Section 179.220-11

Postweld heat treatment.

Section 179.220-13

Inner container manway nozzle and cover.

Section 179.220-14

Openings in the tanks.

Section 179.220-15

Support system for inner container.

Section 179.220-16

Expansion capacity.

Section 179.220-17

Gauging devices, top loading and unloading devices, venting and air inlet devices.

Section 179.220-18

Bottom outlets.

Section 179.220-20

Reinforcements, when used, and appurtenances not otherwise specified.

Section 179.220-22

Closure for openings.

Section 179.220-23

Test of tanks.

Section 179.220-24

Tests of pressure relief valves.

Section 179.220-25

Stamping.

Section 179.220-26

Stenciling.

Section 179.221

Individual specification requirements applicable to tank car tanks consisting of an inner container supported within an outer shell.

Section 179.221-1

Individual specification requirements.

Section 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).

Section 179.300-1

Tanks built under these specifications shall meet the requirements of §§ 179.300 and 179.301.

Section 179.300-3

Type and general requirements.

Section 179.300-4

Insulation.

Section 179.300-6

Thickness of plates.

Section 179.300-7

Materials.

Section 179.300-8

Tank heads.

Section 179.300-9

Welding.

Section 179.300-10

Postweld heat treatment.

Section 179.300-12

Protection of fittings.

Section 179.300-13

Venting, loading and unloading valves.

Section 179.300-14

Attachments not otherwise specified.

Section 179.300-15

Pressure relief devices.

Section 179.300-16

Tests of tanks.

Section 179.300-17

Tests of pressure relief devices.

Section 179.300-18

Stamping.

Section 179.300-19

Inspection.

Section 179.300-20

Reports.

Section 179.301

Individual specification requirements for multi-unit tank car tanks.

Section 179.302

[Reserved]

Section 179.400

General specification applicable to cryogenic liquid tank car tanks.

Section 179.400-1

General.

Section 179.400-3

Type.

Section 179.400-4

Insulation system and performance standard.

Section 179.400-5

Materials.

Section 179.400-6

Bursting and buckling pressure.

Section 179.400-7

Tank heads.

Section 179.400-8

Thickness of plates.

Section 179.400-9

Stiffening rings.

Section 179.400-10

Sump or siphon bowl.

Section 179.400-11

Welding.

Section 179.400-12

Postweld heat treatment.

Section 179.400-13

Support system for inner tank.

Section 179.400-14

Cleaning of inner tank.

Section 179.400-15

Radioscopy.

Section 179.400-16

Access to inner tank.

Section 179.400-17

Inner tank piping.

Section 179.400-18

Test of inner tank.

Section 179.400-19

Valves and gages.

Section 179.400-20

Pressure relief devices.

Section 179.400-21

Test of pressure relief valves.

Section 179.400-22

Protective housings.

Section 179.400-23

Operating instructions.

Section 179.400-24

Stamping.

Section 179.400-25

Stenciling.

Section 179.401

Individual specification requirements applicable to inner tanks for cryogenic liquid tank car tanks.

Section 179.401-1

Individual specification requirements.

Section 179.500

Specification DOT-107A * * * * seamless steel tank car tanks.

Section 179.500-1

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

Section 179.500-3

Type and general requirements.

Section 179.500-4

Thickness of wall.

Section 179.500-5

Material.

Section 179.500-6

Heat treatment.

Section 179.500-7

Physical tests.

Section 179.500-8

Openings in tanks.

Section 179.500-10

Protective housing.

Section 179.500-11

Loading and unloading valves.

Section 179.500-12

Pressure relief devices.

Section 179.500-13

Fixtures.

Section 179.500-14

Test of tanks.

Section 179.500-15

Handling of tanks failing in tests.

Section 179.500-16

Tests of pressure relief devices.

Section 179.500-17

Marking.

Section 179.500-18

Inspection and reports.