API STD 526-ed.8

Annotation of standard text API STD 526-ed.8 :

API STD 526, 8th Edition, August 2023 - Flanged Steel Pressure-relief Valves

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;
• — materials;
• — pressure–temperature limits;
• — center-to-face dimensions, inlet and outlet.

Nameplate nomenclature and requirements for stamping are detailed in Annex A [metric units (SI)] and Annex E [U.S. customary units (USC)].