API STD 526
Flanged Steel Pressure-relief Valves
|Publication Date:||1 September 2017|
This standard is a purchase specification for flanged steel pressure-relief valves. Basic requirements are given for direct spring-loaded pressure-relief valves and pilot-operated pressure-relief valves as follows:
- orifice designation and area;
- valve size and pressure rating, inlet and outlet;
- center-to-face dimensions, inlet and outlet.
Nameplate nomenclature and requirements for stamping are detailed in Annex A.