Doubts regarding the selection of the airtightness test pressure value
Thread Content
During the airtightness test of pipelines, the test pressure is the design pressure (with air as the medium), and it is required that all accessories be present. However, for the airtightness test of safety valves, the pressure used is 0.9 times the set pressure, and since this set pressure is less than or equal to the design pressure, the safety valve may activate during the airtightness test. How should such problems be resolved?
The original poster didn’t consult the regulations; all that’s needed is to remove the safety valve and block it with a blind flange. The regulations clearly state that during pipeline pressure testing, the safety valve, rupture discs, as well as any instrumentation devices that cannot withstand pressure testing must be removed.
The airtight pressure is generally 1.1 times the operating pressure. There’s no need to make it this high