What are the test pressures for the body and seals of general-purpose valves?
Date: 2025-12-29Views: 2387
The test pressure for the body of general-purpose valves is 1.5 times the rated working pressure of the material at 38°C. The high-pressure seal test is conducted at 1.1 times the rated working pressure of the material at 38°C. Requirements for low-pressure seal tests vary by standard.
Specifically:
GB/T 13927-1992, ISO 5208:2008, and EN 12266.2-2012 specify 0.6 MPa ± 0.01 MPa;
GB/T 26481-2011 and API 598-2009: 0.4 MPa to 0.7 MPa;
MSS SP61-2013: 0.56 MPa;
API 6D-2014: Type I: 0.034 MPa to 0.1 MPa; Type II: 0.55 MPa ± 0.69 MPa;
ISO 14313:2007: Type I: 0.05 MPa to 0.1 MPa; Type II: 0.55 MPa ± 0.07 MPa;
API 6A (equivalent to ISO 10423:2003): For PSL 3G, first test: rated pressure; second test: 2.0 MPa ± 0.2 MPa; for PSL 4, first test: rated pressure; second test: 2.0 MPa ± 0.2 MPa.
