Analysis of pressure relief valve proof test data
Bukowski, Julia V.
Analysis of pressure relief valve proof test data - mar. 2009 - 6 p. ; 24-29
This article reports on our statistical analysis of pressure relief valve (PRV) proof test data for the failure mode, fail-to-open, i.e., the PRV remains closed when actual pressure reaches or exceeds 150% of set pressure. Three data sets, from two Fortune 500 operating companies, which met the intent of the quality assurance of proof test data as documented by the Center for Chemical Process Safety Process Equipment Reliability Database (CCPS PERD)[Note 1] initiative, were analyzed. Although the original intent of our analysis focused solely on estimating the failure rate during the useful life[Note 2] of the equipment, it became apparent that the probability of failure on initial installation or reinstallation after proof test, and the need to address what constituted end of useful life were very significant.
1
Analysis of pressure relief valve proof test data - mar. 2009 - 6 p. ; 24-29
This article reports on our statistical analysis of pressure relief valve (PRV) proof test data for the failure mode, fail-to-open, i.e., the PRV remains closed when actual pressure reaches or exceeds 150% of set pressure. Three data sets, from two Fortune 500 operating companies, which met the intent of the quality assurance of proof test data as documented by the Center for Chemical Process Safety Process Equipment Reliability Database (CCPS PERD)[Note 1] initiative, were analyzed. Although the original intent of our analysis focused solely on estimating the failure rate during the useful life[Note 2] of the equipment, it became apparent that the probability of failure on initial installation or reinstallation after proof test, and the need to address what constituted end of useful life were very significant.
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