Abstract
HPIS Z101-2, “Assessment Procedure for Crack-Like Flaws in Pressure Equipment-Level 2”provides the methodology for the evaluation of fitness-for-service for detected flaws in structural components such as pressure vessels, piping, storage tanks during in-service inspection. In this context, the solutions of reference stress, which represent the margin of loading state against limit load condition with respect to stress dimension, are required. Therefore, the HPIS Z101-2 adopted existing proposed reference stress solutions, which was derived based on appropriate theoretical basis. In this paper, the reference stress solutions for axially and circumferentially inner-surface cracked cylinders in HPIS Z101-2 were compared with those in other referable codes⁄standards, including FBR Guideline, R6 Procedure, BS7910, and API579. The HPIS Z101-2 solutions were generally consistent with the other solutions, thus, the adequacy of the HPIS Z101-2 solutions were verified.
