Pipeline operators rely on ILI and NDE to ensure system integrity, but these methods face challenges when detecting and sizing off-axis cracking.

What if NDE suggests a systematic bias in ILI results? Can this data still support Integrity Management Programs (IMP)?

In a Phase 1 case study, NDT Global and Phillips 66 developed a systematic method to identify crack complexity in undersized anomalies, integrating ILI survey data with advanced NDE techniques.

This paper presents Phase II, where destructive lab testing validates the methodology. A metallurgical evaluation of nine ILI-reported anomalies in a 6” pipeline assesses NDE accuracy and potential ILI measurement bias. Additionally, this phase explores Probability of Sizing (POS) for out-of-specification features and potential ILI sizing curve adjustments.

This collaboration provides key insights into pipeline integrity management, enhancing reliability and accuracy in crack detection and sizing methodologies.