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Title: A comparison of the API 1104 Appendix A and BS 7910 procedures for the assessment of girth weld flaws
Category: Technical papers from the Journal of Pipeline Engineering
Downloadable: Yes 
Project No.:
Research Agency:
Catalog No.: 2204s
Date of Publication: Sep 1 2010 12:00AM
Price: $25.00 US
Authors: Sarah E Smith and Henryk G Pisarski
Abstract: THE 2007 revision to API 1104 Appendix A for assessing flaws in pipeline girth welds is compared with BS 7910 Level 2 assessment procedures. Results from full-scale pipe-bend and wide-plate tests are used to plot assessment points for both procedures. Both procedures predicted failure but by widely-ranging margins of safety. Generally, there was little difference between the two procedures, although assessments to BS 7910 were slightly closer to the assessment curve than those to API 1104. Assessments to API 1104 were more likely to predict failure by plastic collapse than those to BS 7910. Example cases were undertaken to compare predicted tolerable flaw sizes using each procedure.
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