§179.400-21 Test of pressure relief valves. RegSenseGeneral Packaging Requirements - HazmatPipeline and Hazardous Materials Safety Administration (PHMSA), DOTCFR RegulationsHazmat SafetyFocus AreaCFR SectionGeneral Packaging Requirements - HazmatEnglishTransportationUSA
Each valve must be tested with air or gas for compliance with §179.401-1 before being put into service.['General Packaging Requirements - Hazmat']['General Packaging Requirements - Hazmat']