Complex Anomaly Profile Optimization For Remaining Strength Assessment Using Ultrasonic In-Line Inspection Data

Intelligent In-Line Inspection technologies are an established approach to investigate the condition of a pipeline system. Several technologies are available on the market. Pipeline operators typically would like to use In-Line Inspection results to estimate immediate repair actions or operational boundary conditions for the future lifespan of the transporting system. This paper will deal with Ultrasonic data gathered by ROSEN In-Line Inspection tools equipped with RoCorrUT. The authors present an optimized approach to calculate the Riverbottom profile commonly used for RSTRENG case 1 defect assessment. Especially for complex, axially-oriented internal anomalies, this approach will increase the accuracy and reliability of pressure calculations. Case studies are elaborated in this regard on the basis of high resolution Automated Ultrasonic Test (AUT) field verification data. Pressure calculations are also performed to illuminate the different results of several new approaches.