Results of Root Cause Analyses of Spring Operated Pressure Relief Valve Failures

Global Congress on Process Safety
2010 Global Congress on Process Safety
Global Congress on Process Safety
March 22, 2010 - 8:00pm
A subset of 44 failed spring operated pressure relief valves (SORV) from a set of over 5600 Process Equipment Reliability Database (PERD) proof tests was subjected to root cause of failure analysis (RCA). This paper reports on the findings of those 44 analyses and includes specific examples of root causes (RC) identified. We considered SORV failures detected in both new and used valves over a period of almost seven years. We categorized the failures using the PERD taxonomy and, additionally, divided the failures into systematic (where reasonable changes to processes or procedures might prevent future failures) and random failures based on each RC. Further, we identified a number of subcategories of RC because they suggest possible actions to significantly reduce failure rates and improve safety performance. We considered how remedial attention to some root causes has markedly improved proof test results at the facility that provided the proof test data. We provide recommendations for conducting such RCA as well as for initiating a RCA program and discuss how time to valve failure (important information for computing valve failure rates) can be estimated based on the RCA findings. Non-Newtonian fluids are outside the scope of this paper.
Professional Development Hours
0.5 PDHs
You will be able to download and print a certificate for these PDH credits once the content has been viewed. If you have already viewed this content, please click here to login.

Would you like to access this content?

No problem. You just have to complete the following steps.

You have completed 0 of 2 steps.

  1. Log in

    You must be logged in to view this content. Log in now.

  2. Purchase Technical Presentation

    You must purchase this technical presentation using one of the options below.
    If you already purchased this content recently, please click here to refresh the system's record of ownerships.


Credits 0.5 Use credits
List Price $25.00 Buy now
AIChE Members $15.00 Buy now
AIChE Undergraduate Student Members Free Free access
AIChE Graduate Student Members $15.00 Buy now