Developing FFS software for fitness-for-service assessment of equipment with hydrogen blistering damage based on API 579-1/ASME FFS-1

Abstract

Corrosion and metal degradation are inevitable phenomena in various industries, and using Standards that provide detailed assessment to evaluate the structural integrity of an in-service damaged component is absolutely essential. Among all existing Standards, API 579-1/ASME FFS-1 is a well-known assessment standard recognized as Fitness-For-Service (FFS) assessment and is employed in various industries to assess the structural integrity of in-service pressure vessels and storage tanks that may contain a flaw or damage. In this study, software for the FFS evaluation was developed according to Part 7 of the third edition of the AP1579-1/ASME FFS-1 and was written using C# programming language. This software is developed for low-strength ferritic steel pressurized components with hydrogen blistering (HB) damage, in order to facilitate decision making on run-repair-replace of an in-service damaged component.