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Title 49

Displaying title 49, up to date as of 7/17/2026. Title 49 was last amended 7/14/2026.
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Title 49TransportationPart / Section
Subtitle BOther Regulations Relating to Transportation100 – 1699
Chapter IPipeline and Hazardous Materials Safety Administration, Department of Transportation100 – 199
Subchapter CHazardous Materials Regulations171 – 185
Part 179Specifications for Tank Cars179.1 – 179.500-18
Subpart AIntroduction, Approvals and Reports179.1 – 179.8
§ 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.
Subpart BGeneral Design Requirements179.10 – 179.24
Subpart CSpecifications for Pressure Tank Car Tanks (Classes DOT-105, 109, 112, 114 and 120)179.100 – 179.103-5
Subpart DSpecifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)179.200 – 179.221-1
Subpart ESpecifications for Multi-Unit Tank Car Tanks (Classes DOT-106A and 110AW)179.300 – 179.302
Subpart FSpecification for Cryogenic Liquid Tank Car Tanks and Seamless Steel Tanks (Classes DOT-113 and 107A)179.400 – 179.500-18
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