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Getting More From Your Intelligent Pig Inspection by Roland Palmer-Jones, Prof. Phil Hopkins, and Andre Goncalves Penspe

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. The Problem. Intelligent pigs are widely used Large quantities of data are collected

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Getting More From Your Intelligent Pig Inspection by Roland Palmer-Jones, Prof. Phil Hopkins, and Andre Goncalves Penspe

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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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