API Standard 526

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.

Sixth Edition
April 2009
Price: $151.00
43 Pages

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