Strain-based design, to be used in Northern Pipeline applications, will likely call for the strength of the girth welds to over-match the longitudinal strength of the pipes. As well, a minimum level of weld metal fracture toughness, as measured by Charpy V-Notch (CVN), Crack-Tip Opening Displacement (CTOD) as well as Wide-Plate tests, will be required. The development work done to date, on Submerged Arc Welds (SAW) used to double joint pipes, has resulted in the production of girth welds for large diameter X80 pipes with minimum yield strength above 100,000 psi (690 MPa), Charpy-V-Notch absorbed energy more than 74 ft-lb (100 Joules) at −4 F (−20 C), CTOD greater than 0.006” (0.15 mm) at −4 F (−20 C) and Wide Plate remote strain greater than 4%, at −4 F (−20 C). This presentation will describe the metallurgical approach adopted for promoting high toughness and achieving over-matching yield strength, for strain-based design application.
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2006 International Pipeline Conference
September 25–29, 2006
Calgary, Alberta, Canada
Conference Sponsors:
- Pipeline Division
ISBN:
0-7918-4261-4
PROCEEDINGS PAPER
High Toughness, Submerged Arc Girth Weld for Northern Pipeline Applications
Laurie Collins
Laurie Collins
IPSCO, Regina, SK, Canada
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Fathi Hamad
IPSCO, Regina, SK, Canada
Xiande Chen
IPSCO, Regina, SK, Canada
Laurie Collins
IPSCO, Regina, SK, Canada
Paper No:
IPC2006-10168, pp. 917-925; 9 pages
Published Online:
October 2, 2008
Citation
Hamad, F, Chen, X, & Collins, L. "High Toughness, Submerged Arc Girth Weld for Northern Pipeline Applications." Proceedings of the 2006 International Pipeline Conference. Volume 1: Project Management; Design and Construction; Environmental Issues; GIS/Database Development; Innovative Projects and Emerging Issues; Operations and Maintenance; Pipelining in Northern Environments; Standards and Regulations. Calgary, Alberta, Canada. September 25–29, 2006. pp. 917-925. ASME. https://doi.org/10.1115/IPC2006-10168
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