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Subpart A—Introduction, Approvals and Reports8

Subpart B—General Design Requirements11

Subpart C—Specifications for Pressure Tank Car Tanks (Classes DOT-105, 109, 112, 114 and 120)31

Subpart D—Specifications for Non-Pressure Tank Car Tanks (Classes DOT-111AW, 115AW, and 117AW)69

Subpart E—Specifications for Multi-Unit Tank Car Tanks (Classes DOT-106A and 110AW)20

Subpart F—Specification for Cryogenic Liquid Tank Car Tanks and Seamless Steel Tanks (Classes DOT-113 and 107A)44

Regulationcurrent

49 CFR 179.202-11

-11 Individual specification requirements.

Current as of 2026-08-18 Government source

eCFR editorial compilationAuthoritative but unofficial

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In addition to § 179.200, the individual specification requirements are as follows:#

DOT specification Insulation Burstingpressure(psig) Minimum plate thickness(Inches) Test pressure(psig) Bottom outlet 117A100W Optional 500 9/16 100 Optional.#