scope:

An overview, comparison, and evaluation of assessment methods for non-crack-like flaws in pressurized components such as straight piping, cylindrical and spherical vessels are provided in this report. The non-crack-like flaws include: flaws include local thin areas; pitting damage; hydrogen blisters and laminations; geometric irregularities such as weld misalignment, shell out-of-roundness, and bulges; and external force damage that typically results in dents or dent-gouge combinations. The vast majority of this work was performed by a Joint Industry Program on Fitness-For-Service administered by The Materials Properties Council working in conjunction with the API Committee on Refinery Equipment's Task Group on Fitness-For-Service. The work performed by these groups forms the technical basis for API 579, and as is shown in this report, a significant amount of the fitness-for-service technology for non-crack-like flaws that is available in the literature