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API RP 520 P2

5th Edition, August 1, 2003

Complete Document

Sizing, Selection, and Installation of Pressure-Relieving Devices in Refineries Part II—Installation

Includes all amendments and changes through Reaffirmation Notice , February 2011


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Superseded By: API STD 520 P2

EN
Additional Comments:
C52025 * W/D S/S BY API STD 520 P2
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Referenced Items:

API RP 521
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Description / Abstract:

This recommended practice covers methods of installation for pressure-relief devices for equipment that has a maximum allowable working pressure (MAWP) of 15 psig (1.03 bar g or 103 kPA) or greater. Pressure-relief valves or rupture disks may be used independently or in combination with each other to provide the required protection against excessive pressure accumulation. As used in this recommended practice, the term pressure-relief valve includes safety relief valves used in either compressible or incompressible ßuid service, and relief valves used in incompressible ßuid service. This recommended practice covers gas, vapor, steam, two-phase and incompressible ßuid service; it does not cover special applications that require unusual installation considerations.