Current design standards and codes do not provide specific guidance how to perform engineering criticality assessment with bi-metallic girth weld in lined or clad pipe. Recently, Bonora et al. (Proc. ASME 2013 32nd OMAE conf.) proposed the equivalent material method (EMM) which allows one to still use current design assessment routes. The method consists in considering instead of three materials in the weld joint, a single “equivalent” material with a flow curve defined as the interpolated lower bound of the three weld joint material flow curves. In this work, the applicability of the EMM was verified considering the effect associated to weld residual stresses. To this purpose, two flaw geometry configurations have been investigated. Particular relevance was given to the multi-pass weld process simulation. Numerical results indicate that the EMM always provides reasonable results in terms of applied J with respect to those obtained considering the effective multimaterials configuration in the weld joint.
ASME 2014 Pressure Vessels and Piping Conference
July 20–24, 2014
Anaheim, California, USA
Conference Sponsors:
- Pressure Vessels and Piping Division
ISBN:
978-0-7918-4600-1
PROCEEDINGS PAPER
The Role of Weld Processing on the Integrity Assessment of Bimetallic Girth Welds
Gabriel Testa
,
Gabriel Testa
University of Cassino and Southern Lazio, Cassino, Italy
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Nicola Bonora
,
Nicola Bonora
University of Cassino and Southern Lazio, Cassino, Italy
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Antonio Carlucci
,
Antonio Carlucci
SAIPEM SA, Montigny-le-Bretonneux, France
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Andrew Ruggiero
,
Andrew Ruggiero
University of Cassino and Southern Lazio, Cassino, Italy
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Gianluca Iannitti
Gianluca Iannitti
Techdyn Engineering, Rome, Italy
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Author Information
Gabriel Testa
University of Cassino and Southern Lazio, Cassino, Italy
Nicola Bonora
University of Cassino and Southern Lazio, Cassino, Italy
Antonio Carlucci
SAIPEM SA, Montigny-le-Bretonneux, France
Andrew Ruggiero
University of Cassino and Southern Lazio, Cassino, Italy
Gianluca Iannitti
Techdyn Engineering, Rome, Italy
Paper No:
PVP2014-28019, V003T03A067; 5 pages
Published Online:
November 18, 2014
Citation
Testa, Gabriel, Bonora, Nicola, Carlucci, Antonio, Ruggiero, Andrew, and Iannitti, Gianluca. "The Role of Weld Processing on the Integrity Assessment of Bimetallic Girth Welds." Proceedings of the ASME 2014 Pressure Vessels and Piping Conference. Volume 3: Design and Analysis. Anaheim, California, USA. July 20–24, 2014. V003T03A067. ASME. https://doi.org/10.1115/PVP2014-28019
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