Improve relief-device sizing under supercritical conditions

摘要

Properly sized relief devices under supercritical conditions are vital to processing natural gas and gas condensates into olefins. These processes operate near the critical locus of the process gases used. Relief-device sizing equations that are based on the nozzle flow equation in API 520 or ASME B&PVC Section I or VIII use the expansion of an ideal gas or a real gas.