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Fracture Toughness of X70 Pipe Girth Welds Using Clamped SE(T) and SE(B) Single-Specimens

[+] Author Affiliations
Dong-Yeob Park, Jean-Philippe Gravel

CanmetMATERIALS, Natural Resources Canada, Calgary, AB, Canada

C. Hari Manoj Simha, Jie Liang

CanmetMATERIALS, Natural Resources Canada, Hamilton, ON, Canada

Da-Ming Duan

TransCanada, Calgary, AB, Canada

Paper No. IPC2014-33233, pp. V004T11A005; 7 pages
  • 2014 10th International Pipeline Conference
  • Volume 4: Production Pipelines and Flowlines; Project Management; Facilities Integrity Management; Operations and Maintenance; Pipelining in Northern and Offshore Environments; Strain-Based Design; Standards and Regulations
  • Calgary, Alberta, Canada, September 29–October 3, 2014
  • Conference Sponsors: Pipeline Division
  • ISBN: 978-0-7918-4613-1
  • Copyright © 2014 by ASME and Her Majesty the Queen in right of Canada


Shallow-notched single edge-notched tension (SE(T) or SENT) and deep- and shallow-notched single edge-notched bend (SE(B) or SENB) specimens with notches positioned in the weld and the heat-affected zone were tested. Crack-tip opening displacement (CTOD) versus resistance curves were obtained using both a single and double clip gauge consolidated in a SE(T) single-specimen. Up until the peak load the resistance curves from both gauging methods yield approximately the same results; thereafter the curves deviate. Interrupted testing showed that the crack had initiated below 50% of the peak load, and in some cases had propagated significantly prior to reaching the peak load.

Copyright © 2014 by ASME and Her Majesty the Queen in right of Canada



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