This paper presents the proposed revisions of the EPRG guidelines for the assessment of defects in transmission pipeline girth welds. The revisions cover Tier 2 of the guidelines, in particular (a) the extension of the guidelines to include Grade L555 (X80) material, (b) the assessment of surface-breaking defects with heights up to 5mm and (c) the assessment of multiple co-planar defects. Since the welds should be, at least, matching the pipe material in yield strength, the paper also defines the required levels of weld metal yield strength for the safe application of the guidelines.
- International Petroleum Technology Institute and the Pipeline Division
EPRG Tier 2 Guidelines for the Assessment of Defects in Transmission Pipeline Girth Welds
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Denys, R, Andrews, RB, Zarea, M, & Knauf, G. "EPRG Tier 2 Guidelines for the Assessment of Defects in Transmission Pipeline Girth Welds." Proceedings of the 2010 8th International Pipeline Conference. 2010 8th International Pipeline Conference, Volume 2. Calgary, Alberta, Canada. September 27–October 1, 2010. pp. 873-879. ASME. https://doi.org/10.1115/IPC2010-31640
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