Subpart A—Introduction, Approvals and Reports8Subpart B—General Design Requirements11Subpart C—Specifications for Pressure Tank Car Tanks (Classes DOT-105, 109, 112, 114 and 120)31Subpart D—Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)69Subpart E—Specifications for Multi-Unit Tank Car Tanks (Classes DOT-106A and 110AW)20Subpart F—Specification for Cryogenic Liquid Tank Car Tanks and Seamless Steel Tanks (Classes DOT-113 and 107A)44
Regulationcurrent
49 CFR 179.6
Repairs and alterations.
Current as of 2026-08-18 Government source
eCFR editorial compilationAuthoritative but unofficial
For procedure to be followed in making repairs or alterations, see appendix R of the AAR Specifications for Tank Cars (IBR, see § 171.7 of this subchapter).#
RegulusPipeline research