Publications
| Title | | Authors |
|---|---|
| Recommended revisions of the EPRG Tier 2 Guidelines for the assessment of defects in transmission pipeline girth welds « back |
R M Denys, R M Andrews, M Zarea and G Knauf |
| 6th International Pipeline Technology Conference, Ostende, October 2009 | |
The paper outlines the technical basis for the recommended revisions of the current “1996” EPRG-Tier 2 guidelines. The revisions include the extension of the guidelines to include Grade L555 (X80) material and the assessment of surface-breaking defects with heights up to 5mm. In addition, recommendations are made to improve the current interaction criteria for co-planar defects in welds complying with the EPRG material and performance requirements. Finally, since the weld strength mismatch is of major importance in establishing tolerable defect sizes, the paper also defines the required level of weld metal yield strength for the safe application of the guidelines. | |
| Paper request | |