scope:

1.1 Scope

This recommended practice is intended to cover methods of installation for pressure relief devices for equipment that has a maximum allowable working pressure (MAWP) of 15 pounds per square inch gauge (psig) (1.03 bar g) or greater. Pressure relief valves or rupture disks may be used independently or in combination with each other to provide the required protection against excessive pressure accumulation. As used in this recommended practice, the term pressure relief valve includes safety relief valves used in either compressible or incompressible fluid service, and relief valves used in incompressible fluid service. This recommended practice covers gas, vapor, steam, and incompressible fluid service; it does not cover special applications that require unusual installation considerations.