by Philip A. Henry, P.E. / Phillip J. Smith, Ph.D. / Jan 01, 2018

A pressure relief valve (PRV) is subject to the possibility of undetected failure, just as any other safety device that sits quietly for long periods before being relied upon to perform its function. How reliable are your PRVs? How frequently do you have to test, inspect, and overhaul a PRD to obtain the required reliability? To answer these questions, E2G has evaluated pop-test records reported in the PRV RBI databases for several clients in order to develop insights concerning the reliability of pilot, conventional, and balanced-type PRVs, as well as to assess the relative severity of common service conditions encountered in refinery facilities.

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