Used as a purchase specification, the basic requirements, such as orifice designation and area; valve size and pressure rating, inlet and outlet; materials; pressure-temperature limits; center-to-face dimensions; and inlet and outlet requirements, are given for direct spring-loaded pressure relief valves and pilot-operated pressure relief valves.
API 526:1995 History
API Std 526:2017
$117.00 $234.00
API Std 526:2009
$87.00 $175.00
API Std 526:2002
$72.00 $144.00
API 526:1995
$66.00 $133.00
More Standards PDF
API MPMS Chapter 4.6 (R2013)
$36.00 $73.00
API Std 614:1999
$103.00 $206.00
API TR 6AF2:1999
$72.00 $144.00
API RP 11S3 (R2013)
$64.00 $129.00









