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PDAM Contents

The 'PDAM' project has four products:

  • PDAM -The Pipeline Defect Assessment Manual is a 473 page manual containing the detailed methods needed to assess a variety of defects in pipelines;
  • Reviews – Twenty-four pipeline defect assessment literature reviews were researched and written to provide a sound technical basis for the recommended methods in PDAM;
  • Calculations – Thirty spreadsheets covering the methods in PDAM were developed;
  • Data – Thirty-five spreadsheets containing the full-scale test data that form the bases of many of the recommended methods in PDAM, were produced.

PDAM Manual+

The chapters of the current 473-page PDAM2 Manual are:

  1. Introduction;
  2. Scope;
  3. Background;
  4. Types of Defect Considered;
  5. The Methodology for Conducting an Assessment;
  6. The Format of the Pipeline Defect Assessment Manual;
  7. The Definition of Acceptance;
  8. The Design Factor;
  9. Design and Operating Pressure and Over-Pressure;
  10. The Use of Specified Minimum Material Properties;
  11. The Use of the Specified Minimum Wall Thickness;
  12. A Corrosion Allowance;
  13. Measurement Uncertainty and Inspection Tolerances;
  14. Safe Working Practices in the Vicinity of a Damaged Pipeline;
  15. Guidance on the Measurement of Damage;
  16. Repair Methods;
  17. Assessment Methods Recommended in the Pipeline Defect Assessment Manual;
  18. References;
  19. Defect Free-Pipe;
  20. Corrosion;
  21. Gouges;
  22. Plain Dents;
  23. Kinked Dents;
  24. Smooth Dents on Welds;
  25. Smooth Dents and Gouges;
  26. Smooth Dents Containing Other Types of Defect;
  27. ‘Spring Back’ and ‘Rerounding’ of Dents;
  28. Manufacturing Defects in the Pipe Body;
  29. Girth Weld Defects;
  30. Seam Weld Defects;
  31. Cracks and Cracl-Like Defects;
  32. Environmental Cracking;
  33. Fatigue;
  34. Defects in Pipeline Fittings;
  35. Interaction Between Defects;
  36. Leak and Rupture;
  37. Fracture Propagation.

Background and Literature Reviews+

All reports written by Penspen, unless otherwise stated:

  • Assessment Methods for Defect Free Pipe;
  • Assessment Methods for Corrosion in Pipelines;
  • Assessment Methods for Gouges in Pipelines;
  • Assessment Methods for Dents in Pipelines;
  • Spring Back and Rerounding in Dented Pipelines;
  • Assessment Methods for Dents and Gouges in Pipelines;
  • Assessment Methods for Dents and Other Defects in Pipelines;
  • Time Dependent Behaviour of Defects in Pipelines;
  • Assessment Methods for Cracking in Pipelines;
  • Assessment Methods for Manufacturing Defects in Pipelines;
  • Assessment Methods for Defects in Pipeline Girth Welds and Seam Welds (by DNV);
  • Assessment Methods for Environmental Cracking in Pipelines;
  • Methods governing and preventing long running ductile and brittle propagating fast fracture in gas transmission pipelines (by CSM);
  • Assessment Methods for Defects in Pipeline Fittings;
  • The Leak-Rupture Behaviour of Defects in Pipelines;
  • Interaction Between Defects in Pipelines;
  • Corrosion;
  • Cracking;
  • Environmental Cracking;
  • Fatigue;
  • Fracture Propagation;
  • Mechanical Damage;
  • Subsea;
  • Weld Effects.

Defect Calculation Excel Spreadsheets+

  • Corrosion internal pressure (burst) (using DNV-RP-F101 Part B);
  • Corrosion internal pressure (burst interaction) (using DNV-RP-F101 Part B);
  • Corrosion internal pressure (burst) (river-bottom) using DNV-RP-F101 Part B);
  • Corrosion internal pressure and compressive external (burst) (using DNV-RP-F101 Part B);
  • Corrosion internal pressure (burst) (using DNV-RP-F101 Part A);
  • Corrosion internal pressure (burst) (using ‘modified’ ASME B31G);
  • Corrosion internal pressure (burst) (using ASME B31G);
  • Corrosion internal pressure (burst) (using a ‘remaining strength’ criterion);
  • Corrosion circumferential bending;
  • Corrosion circumferential internal pressure axial load;
  • Corrosion circumferential internal pressure axial load bending;
  • Gouge longitudinal internal pressure (burst);
  • Gouge circumferential bending;
  • Gouge circumferential internal pressure axial load;
  • Gouge circumferential internal pressure axial load bending;
  • Gouge helical internal pressure axial load bending;
  • Plain dent internal pressure (burst);
  • Plain dent internal pressure (fatigue);
  • Smooth dent and gouge internal pressure (burst);
  • Smooth dent and gouge internal pressure (fatigue);
  • Smooth dent on weld internal pressure (fatigue);
  • Girth weld defect (using the EPRG guidelines);
  • Leak-rupture longitudinal internal pressure (toughness dependent);
  • Leak-rupture longitudinal internal pressure (flow stress dependent);
  • Leak-rupture circumferential bending;
  • Leak-rupture circumferential internal pressure axial load;
  • Leak-rupture circumferential internal pressure axial load bending;
  • Fracture propagation (using the EPRG guidelines);
  • Fracture propagation (using DNV-OS-F101);
  • Prevention of ductile fracture.

Test Data Spreadsheets+

  • Burst Tests on Defect Free Pipe;
  • External Pressure and Other Loads Tests;
  • Buckle Propagation Tests;
  • Burst Tests on Corrosion;
  • Tests on Circumferential Corrosion;
  • Tests on Corrosion (internal pressure and other loads);
  • Burst Tests on Gouges (Part-Wall Defects);
  • Fatigue Tests on Gouges (Part-Wall Defects);
  • Tests on Longitudinal Part-Wall Defects;
  • Tests on Circumferential Part-Wall Defects;
  • Tests on Helical Through-Wall Part-Wall Defects;
  • Burst Tests on Through-Wall Defects;
  • Tests on Circumferential Through-Wall Defects;
  • Burst Tests on Dents;
  • Burst Tests on Dents on Welds;
  • Fatigue Tests on Dents;
  • Fatigue Tests on Dents on Welds;
  • Spring Back and Rounding of Dents;
  • Burst Test on Dents and Gouges;
  • Burst Test on Dents and Other Defects;
  • Fatigue Test on Dents and Gouges;
  • Test on Defect Free Bends;
  • Test on Defects in Bends;
  • Tests on Interaction;
  • Tests on Defects at Constant Pressure;
  • Leak and Rupture;
  • Full Scale Burst Test Pipes Data Bank;
  • Full Scale Burst Test on Longitudinal Welded Pipes Data Bank;
  • Full Scale Burst Test on Spiral Welded Pipes;
  • Dent Gouge Burst;
  • Dent Gouge Fatigue;
  • Longitudinal Gouge Burst;
  • Plain Dent Burst;
  • Plain Dent Fatigue (Damage);
  • Smooth Dent on Weld Fatigue.