PR727-223805-Z01 Guidelines for When to Perform Crack Detection In-Line Inspection

The goal of this project was to develop flow charted decision processes for operators to determine when ILI is appropriate and recommended.  Two initial tasks developed the background material needed for developing the decision processes.  Task 1 is a review of publicly available and industry research reports pertaining to the linkage between susceptibility to crack-related failure and performing ILI.  Primary references are the results from industry work that informed the development of TTO5 and the development of other industry guidance documents.  Task 2 is a survey of operators to understand the extent to which TTO5 does or does not address their integrity management needs regarding reassessments for cracks, and to learn the details of their solutions to perceived shortcomings with TTO5.  Task 3 is the development of an updated decision process for determining susceptibility to cracking and the necessary intervals for assessment of the pipeline condition with respect to fatigue cracking and stress-corrosion cracking.  Separate decision processes were developed for cracks that grow by fatigue and corrosion (either stress corrosion or corrosion fatigue).  The decision process for fatigue crack growth susceptibility and the associated assessment schedule has three frameworks.  The process for stress corrosion crack and corrosion fatigue has one. This Bundle includes the Final Report (PR727-223805-R01 Guidelines for When to Perform Crack Detection In-Line Inspection) and 2 White Papers (PR727-223805-R02 Decision Process for Fatigue Crack Growth Susceptibility and Assess White Paper & PR727-223805-R03 Stress Corrosion Cracking Susceptibility White Paper)