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 ..
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.1, 2
Details of sizing equations
Per API 520, if the compressibility factor of the fluid is greater than 0.8, then the ideal gas ratio of specific heats may be used to determine the expansion coefficient. If the compressibility factor is less than 0.8, then the expansion coefficient should be based on the isentropic expansi
Log in to view this article.
Not Yet A Subscriber? Here are Your Options.
1) Start a FREE TRIAL SUBSCRIPTION and gain access to all articles in the current issue of Hydrocarbon Processing magazine.
2) SUBSCRIBE to Hydrocarbon Processing magazine in print or digital format and gain ACCESS to the current issue as well as to 3 articles from the HP archives per month. $409 for an annual subscription*.
3) Start a FULL ACCESS PLAN SUBSCRIPTION and regain ACCESS to this article, the current issue, all past issues in the HP Archive, the HP Process Handbooks, HP Market Data, and more. $1,995 for an annual subscription. For information about group rates or multi-year terms, contact email Peter Ramsay or call +44 20 3409 2240*.
*Access will be granted the next business day.