F031002 Outline of Metal Loss Assessments for Petroleum and Petrochemical Plants

Abstract

Concern about fitness-for-service (FFS) assessments stochastic analyses for aged pressure equipment with local metal loss has been growing. When a decision must be made regarding whether to run or repair equipment with local metal loss, a structural integrity assessment based on reliability helps. On the other hand, several standards for metal loss assessment procedures were published or revised recently, for example API 579-1/ASME FFS-1, BS7910, DNV RP F101. Some of the standards provide assessment procedures using partial safety factors based on reliability. In this paper, metal loss assessment procedures based on reliability and related recommended practices and standards are introduced.