Section 179.200-23 - Tests of pressure relief valves(a) Each valve shall be tested by air or gas for compliance with § 179.15 before being put into service.29 FR 18995, Dec. 29, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967, as amended at 62 FR 51561, Oct. 1, 1997