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Welding of High Strength Pipelines

[+] Author Affiliations
Bill Bruce, Jose Ramirez

EWI, Columbus, OH

Matt Johnson

Los Alamos National Laboratory, Los Alamos, NM

Robin Gordon

EWI Microalloying International, LP, Houston, TX

Paper No. IPC2004-0472, pp. 1499-1504; 6 pages
doi:10.1115/IPC2004-0472
From:
  • 2004 International Pipeline Conference
  • 2004 International Pipeline Conference, Volumes 1, 2, and 3
  • Calgary, Alberta, Canada, October 4–8, 2004
  • Conference Sponsors: International Petroleum Technology Institute
  • ISBN: 0-7918-4176-6 | eISBN: 0-7918-3737-8
  • Copyright © 2004 by ASME

abstract

This paper presents the results of a project jointly funded by PRCI and EWI to evaluate the welding of X100 pipe grades using commercially available welding consumables. The welding trials included manual, semi-automatic and mechanized welding procedures. It was found that the combination of Pulsed GMAW and ER100S-1 (using a mixed shielding gas) produced both excellent Charpy impact and CTOD performance, but could result in undermatched girth welds if the pipe significantly exceeds minimum strength requirements. Although ER120 S-1 provides an additional margin of safety in strength, which should accommodate variations in X-100 pipe properties, the toughness results were marginal at −10°C. The risk of weld metal hydrogen cracking in X100 girth welds was also investigated.

Copyright © 2004 by ASME
Topics: Welding , Pipelines

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