The mechanical properties and compositional limits of line pipe for all major pipeline projects are subject to stringent project specific specifications and have substantial user input. The standards for welding electrodes do not have the same level of user involvement and permit significant latitude in terms of alloy design despite the fact that it is known the original electrode design can be markedly altered by elemental transfer as a result of changes in welding parameters and also the condition of the electrodes prior to welding. Several commercially available E8010 consumables have been evaluated under simulated field welding conditions. In addition, the influence of welding arc length and electrode conditioning were investigated. Significant variations in microstructure, hardness and Charpy impact toughness were noted and appear to be primarily related to the final chemical composition of the deposited weld metal. The weld metal carbon equivalent values ranged from 0.20 to 0.42 and all consumables contained additions of Ti and B in the flux coating which resulted in significant levels of B in the final deposited weld metal. It is recommended that the appropriate standards relating to the production and performance of cellulosic consumables be addressed to ensure complete disclosure of consumable formulations to the end user.
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2008 7th International Pipeline Conference
September 29–October 3, 2008
Calgary, Alberta, Canada
Conference Sponsors:
- International Petroleum Technology Institute and the Pipeline Division
ISBN:
978-0-7918-4859-3
PROCEEDINGS PAPER
Compositional Aspects of Cellulosic Electrodes Used for Welding Pipelines Available to Purchase
Frank J. Barbaro,
Frank J. Barbaro
BlueScope Steel, Wollongong, NSW, Australia
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Valerie M. Linton,
Valerie M. Linton
University of Adelaide, Adelaide, South Australia, Australia
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Erwin Gamboa,
Erwin Gamboa
University of Adelaide, Adelaide, South Australia, Australia
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Leigh Fletcher
Leigh Fletcher
Welding and Pipeline Integrity, Adelaide, South Australia, Australia
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Frank J. Barbaro
BlueScope Steel, Wollongong, NSW, Australia
Valerie M. Linton
University of Adelaide, Adelaide, South Australia, Australia
Erwin Gamboa
University of Adelaide, Adelaide, South Australia, Australia
Leigh Fletcher
Welding and Pipeline Integrity, Adelaide, South Australia, Australia
Paper No:
IPC2008-64691, pp. 497-505; 9 pages
Published Online:
June 29, 2009
Citation
Barbaro, FJ, Linton, VM, Gamboa, E, & Fletcher, L. "Compositional Aspects of Cellulosic Electrodes Used for Welding Pipelines." Proceedings of the 2008 7th International Pipeline Conference. 2008 7th International Pipeline Conference, Volume 3. Calgary, Alberta, Canada. September 29–October 3, 2008. pp. 497-505. ASME. https://doi.org/10.1115/IPC2008-64691
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