I was given two excel spreadsheets by a reputable engineering firm in Houston Texas.

#1 excel spreadsheet calculates the vessels two-phase relief load and the required relief nozzle area for 2-phase flow. This worksheet is based on a this paper: H. S. Forrest, Int'l Sym. Runaway Reactions and Pressure Relief Design, 1995, Boston, AIChE.

#2: The second excel spreadsheet calculates the relief nozzle area for two-phase and inlet and outlet PSV piping pressure losses including calculation of equivalent length for valves and fittings. This worksheet is based on a this paper: Easily Size Relief Devices and Piping for Two-Phase Flow" by Joseph Leung in December 1996 issue of Chemical Engineering Progress

Email me paper #1, you get excel sheet #1
Email me paper #2, you get excel sheet #2

I can't use either the spreadsheets before I verify all equation by myself. If I email you the spreadsheet, you could post them here it you want.

A fair trade, I believe.

eliealtawil@yahoo.com

Cheers,