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 ?uid service@ and relief valves used in incompressible ?uid service. This recommended practice covers gas@ vapor@ steam@ two-phase and incompressible ?uid service; it does not cover special applications that require unusual installation considerations.
API RP 520 PT II-2003 history
0000 API STD 520 PT II:2015
2003API RP 520 PT II-2003 Sizing@ Selection@ and Installation of Pressure-Relieving Devices in Refineries Part II—Installation (Fifth Edition)
1994API RP 520 PT II-1994 Sizing@ Selection@ and Installation of Pressure-Relieving Devices in Refineries Part II - Installation (Fourth Edition)
1988API RP 520 PT II-1988 Sizing@ Selection@ and Installation of Pressure-Relieving Devices in Refineries Part II - Installation (Third Edition)
1963API RP 520 PT II-1963 RECOMMENDED PRACTICE FOR THE DESIGN AND INSTALLATION OF PRESSURE - RELIEVING SYSTEMS IN REFINERIES SECOND EDITION (R 1973)