The JB/T 6441-2008 Safety Valves for Compressors standard specifies the design, construction, performance and testing requirements of spring-loaded direct load safety valves for gas compressors. The standard covers the marking, locking and lead sealing requirements of safety valves, as well as supply conditions. It is suitable for safety valves with a setting pressure of not more than 42.0 MPa and a nominal size not greater than DN40 to ensure the Reliability and effectiveness of safety valves.