PR-306-123733-R01 Realistic Dent and Gouge Defects With and Without Fatigue Cracks

Abstract

This report provides basic information about vintage pipe samples containing dent and gouge defects with and without fatigue cracks for inspection technology evaluation and repair techniques qualification. Four mechanical damage dent and gouge defects without fatigue cracks were created in a realistic manner in vintage pipes. The two remaining samples containing also the same types of defects were submitted to internal pressure cycling to initiate a significant crack at the bottom of the gouge. Two types of defects were created: intermediate gouge in shallow dent, intermediate gouge in severe dent. Four defects are dedicated for performance evaluation of inspection technologies whereas two defects (one of each type) without fatigue crack are for repair techniques qualification. These defects are similar to those created in project PRCI MD-4-6 for destructive metallurgical characterization and for burst and fatigue tests. This version of the report does not contain results of any measurements performed on the defects, in order to facilitate blind testing of inspection technologies using the samples produced in this project.