API Std 526

Flanged Steel Pressure-relief Valves, Sixth Edition (Includes Errata 1, Errata 2)

American Petroleum Institute , 04/01/2009

Publisher: API

File Format: PDF

$87.00$175.00


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.

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