API 521 and BP GN 44-001 are my two main references. It seems that BP and other major oil & gas companies developed their own emergency depressurizing philosophies based on API 521.
However, my friends and I couldn't locate BP "GP 81-31 LNG ESD and depressuring system" and "GP 81-41 LNG Overpress prot'n, flare & vent sys" (see attached).
I'll need to estimate maximum blowdown rates using a simulator (not HYSYS) for stainless steel systems with various thicknesses. Since the API 521 example is for 1" carbon steel plate, the 15-minute time frame won't apply to S.S.? In addition, should I calculate rupture stresses of those EDP systems using "ASME Boiler and Pressure Vessel Code - Section II Materials - Part D Properties - Subpart 1 Stress Tables"?
What would be some good sources of emergency depressurizing philosophies?
Thank you in advance for your help!
Edited by moongazer, 06 July 2011 - 03:53 PM.