Hello All,

I was wondering if there is any reading material available in the market or on the internet on the subject topic.What i am basically looking for is a book or article with illustrated examples (with P&IDs), examining each overpressure cause or source of overpressure (blocked outlet, fire case, hyd expansion etc), and whether the cause is applicable to the given system.I am comfortable doing the relief load calcs once i have firmed up the relieving scenario but to start with i tend to have doubts whether I have missed out any scenarios when I am analyzing systems for failures.I know that evaluating relief scanarios is mainly about common sense,engg judgement and experience, but if there is material available it would be nice to get a better "feel" of the subject.

Thanks.

Please find below listing of documents probably help you in understanding of Relief Scenario Analysis.

1. API Standard 521 Jan 2007, section 4
2. API RP520, 7th Edition, January 2000
3. "Guidelines for Pressure Relief and Effluent Handling Systems", Center for Chemical Process Safety (CCPS) for the American Institute of Chemical Engineers (AIChE), (1998) New York
4. "Emergency Relief System Design Using DIERS Technology: The DIERS Project Manual. Fisher, H. G., Forrest, H. S., Grossel, S. S., Huff, J. E., Muller, A. R., Noronha, J. A., Shaw, D. A., and Tilley, B. J. (1992)., AIChE, New York.

Extra reading
5. Leckner, P. Six Part Series on Rupture Disks, Chemical Engineers' Resource Page
6. Workbook for Chemical Reactor Relief System Sizing

Item 1, section 4 may give a overall understanding.

JoeWong

I just want to emphasize that the most direct answer to your particular question will be to read API Standard 521 Jan 2007.

The other documents Joe listed comes from a comprehensive list of documents I posted as an answer to a post titled "PSV Locations" found on this Forum and that every engineer who is series in performing relief system design should have in their library.