This recommended practice applies to the sizing and selection of pressure relief devices used in refineries and related industries for equipment that has a maximum allowable working pressure of 15 psig [103 kPag] or greater. The pressure relief devices covered in this recommended practice are intended to protect unfired pressure vessels and related equipment against overpressure from operating and fire contingencies.
API RP 520:2000 History
API Std 520, Part 1
$208.00 $416.00
API Std 520, Part 1:2014
$66.00 $133.00
API Std 520:2008
$70.00 $140.00
API RP 520:2000
$72.00 $144.00
More Standards PDF
API Std 561:2026
$78.00 $156.00
API Std 2RD:2025
$192.00 $385.00
API Std 599:2025
$83.00 $167.00
API RP 1646:2025
$87.00 $175.00













