Regulations last checked for updates: Nov 22, 2024

Title 49 - Transportation last revised: Nov 18, 2024
All TitlesTitle 49Chapter IPart 179Subpart F - Subpart F—Specification for Cryogenic Liquid Tank Car Tanks and Seamless Steel Tanks (Classes DOT-113 and 107A)
View all text of Subpart F [§ 179.400 - § 179.500-18]
§ 179.400-21 - Test of pressure relief valves.

Each valve must be tested with air or gas for compliance with § 179.401-1 before being put into service.

authority: 49 U.S.C. 5101-5128; 49 CFR 1.81 and 1.97
source: 29 FR 18995, Dec. 29, 1964, unless otherwise noted. Redesignated at 32 FR 5606, Apr. 5, 1967.
cite as: 49 CFR 179.400-21
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