Safety & Relief Device
Pressure relief valves, rupture disks, and flare systems design.
Primary standards
All applicable standards (7)
API 576
Inspection of Pressure-Relieving Devices
Inspection, testing, maintenance, and recordkeeping for pressure-relieving devices.
Inspection & Maintenance
Pressure-Relieving Device · Safety Valve · Rupture Disk
API 520 Part I
Sizing, Selection, and Installation of Pressure-relieving Devices - Part I: Sizing and Selection
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 or greater.
Safety & Relief Devices
Relief Valve · Safety Valve · Safety & Relief Devices
API 520 Part II
Sizing, Selection, and Installation of Pressure-relieving Devices - Part II: Installation
Covers methods of installation for pressure-relief devices for equipment that has a maximum allowable working pressure of 15 psig or greater.
Safety & Relief Devices
Relief Valve · Safety Valve · Safety & Relief Devices
API 521
Pressure-relieving and Depressuring Systems
Applies to pressure-relieving and vapor depressuring systems. Gives guidelines for examining the principal causes of overpressure, determining relief rates, and designing disposal systems.
Safety & Relief Devices
Flare System · Safety & Relief Devices
API 526
Flanged Steel Pressure-relief Valves
Specifies minimum requirements for direct spring-loaded pressure-relief valves and pilot-operated pressure-relief valves as follows: orifice designation and area, valve size and pressure rating, materials, and center-to-face dimensions.
Safety & Relief Devices
Relief Valve · Safety & Relief Devices
API 527
Seat Tightness of Pressure Relief Valves
Describes methods of determining the seat tightness of metal- and soft-seated pressure relief valves, including those of conventional, bellows, and pilot-operated designs.
Safety & Relief Devices
Relief Valve · Safety & Relief Devices
API 537
Flare Details for Petroleum, Petrochemical, and Natural Gas Industries
Specifies requirements and provides guidance for the selection, design, specification, operation, and maintenance of flares and related combustion and mechanical components.
Safety & Relief Devices
Flare System · Safety & Relief Devices