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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 179.301

Individual specification requirements for multi-unit tank car tanks.

Current as of 2026-08-18 Government source

eCFR editorial compilationAuthoritative but unofficial

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(a)In addition to § 179.300 the individual specification requirements are as follows:#

DOT specification 106A500-X 106A800-X 110A500-W 110A600-W 110A800-W 110A1000-W Minimum required bursting pressure, psig (1) (1) 1250 1500 2000 2500 Minimum thickness shell, inches 13⁄32 11⁄16 11⁄32 3⁄8 15⁄32 19⁄32 Test pressure, psig (see § 179.300-16) 500 800 500 600 800 1000 Safety relief devices, psig (see § 179.300-15) Start-to-discharge, or burst maximum, p.s.i. 375 600 375 450 600 700 Vapor-tight, minimum psig 300 480 300 360 480 650 1 None specified.#

(b)[Reserved]#