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Enhancing Intelligent Pig Inspection: Data Utilization for Defect Assessment

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This presentation discusses the advancements in intelligent pig inspections, focusing on the challenges of managing large data sets generated during these inspections. Traditional methods of defect reporting often lead to conservative assessments due to their simplistic nature. The talk will cover various inspection technologies, including Magnetic Flux Leakage (MFL) and Ultrasonic Testing (UT), along with defect sizing and assessment techniques, including case studies highlighting their effectiveness. By improving data accessibility and analysis, we can achieve more reliable defect evaluations.

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Enhancing Intelligent Pig Inspection: Data Utilization for Defect Assessment

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  1. Getting More From Your Intelligent Pig Inspection by Roland Palmer-Jones, Prof. Phil Hopkins, and Andre Goncalves Penspen Integrity PPSA Seminar Aberdeen 14 – Nov 2007

  2. The Problem • Intelligent pigs are widely used • Large quantities of data are collected • Defects are generally reported in a simple spreadsheet format. • Simple clustering and defect sizing leads to safe conservative assessments

  3. Outline • Inspection Technology • MFL • UT • Defect Sizing • Defect Assessment • ‘Complex Shape’ Assessment • Case Study

  4. N MAGNET S Pipe Wall Flux Lines MFL Inspection © Penspen Ltd.

  5. N MAGNET S Pipe Wall Flux Lines MFL Defect Sizing • Relative measurement • Depth • Signal amplitude • Number of sensors affected

  6. MFL Data © Penspen Ltd.

  7. UT Inspection www.ndt-ag.com

  8. UT Defect Sizing • Absolute Depth/Wall Thickness • Time difference between echo signals

  9. UT Data © Penspen Ltd.

  10. Individual Defects © Penspen Ltd. © Penspen Ltd.

  11. Multiple Defects? © Penspen Ltd.

  12. © Penspen Ltd.

  13. Clustering © Penspen Ltd.

  14. Cluster

  15. Evaluation Based on ‘Actual’ Shape • RSTRENG – Riverbottom Profile • DNV RP-F101 Complex Shape Method

  16. RSTRENG

  17. DNV RP-F101

  18. Example 1

  19. UT data © Penspen Ltd.

  20. Rectangular Profile Failure Pressure 219 bar

  21. Riverbottom ProfileFailure Pressure 305 bar

  22. Example 2

  23. Inspection/Repair Can be Expensive © Penspen Ltd. © Penspen Ltd.

  24. Summary • Defect profile data gives assessment benefits • Profile data is collected anyway and so should be supplied in an accessible format with the inspection report.

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