API 602 is an American Petroleum Institute (API) standard for compact forged steel gate, globe, and check valves used in petroleum, natural gas, and related industries. It applies to valves with NPS 4 (DN 100) and smaller connections, including flanged, threaded, socket-weld, buttweld, and extended-body ends.
The standard specifies requirements for design, materials, testing, and dimensions across pressure classes (e.g., 150 to 1500).
Key features include rigorous leak testing per API 598, suitability for high-pressure/temperature services, and options for extended bodies or bellows seals.
API 602 valves ensure reliability in critical applications like refineries and pipelines.
