Strain-based girth weld defect assessment procedures are essentially based on large scale testing. Ever since the 1980’s curved wide plate testing has been widely applied to determine the tensile strain capacity of flawed girth welds. However, the effect of internal pressure is not captured in curved wide plate testing. Accordingly, unconservative predictions of strain capacity occur when straightforwardly transferred to pressurized pipes. To address this anomaly, this paper presents results of finite element simulations incorporating ductile crack growth. Simulations on homogeneous and girth welded specimens indicate that a correction factor of 0.5 allows to conservatively predict the strain capacity of a pressurized pipe through wide plate testing under the considered conditions.
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2012 9th International Pipeline Conference
September 24–28, 2012
Calgary, Alberta, Canada
Conference Sponsors:
- International Petroleum Technology Institute
- Pipeline Division
ISBN:
978-0-7918-4515-8
PROCEEDINGS PAPER
Pressure Correction Factor for Strain Capacity Predictions Based on Curved Wide Plate Testing
Matthias Verstraete,
Matthias Verstraete
Ghent University, Gent, Belgium
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Wim De Waele,
Wim De Waele
Ghent University, Gent, Belgium
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Stijn Hertelé
Stijn Hertelé
Ghent University, Gent, Belgium
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Matthias Verstraete
Ghent University, Gent, Belgium
Wim De Waele
Ghent University, Gent, Belgium
Rudi Denys
Ghent University, Gent, Belgium
Stijn Hertelé
Ghent University, Gent, Belgium
Paper No:
IPC2012-90592, pp. 359-365; 7 pages
Published Online:
July 25, 2013
Citation
Verstraete, M, De Waele, W, Denys, R, & Hertelé, S. "Pressure Correction Factor for Strain Capacity Predictions Based on Curved Wide Plate Testing." Proceedings of the 2012 9th International Pipeline Conference. Volume 4: Pipelining in Northern and Offshore Environments; Strain-Based Design; Risk and Reliability; Standards and Regulations. Calgary, Alberta, Canada. September 24–28, 2012. pp. 359-365. ASME. https://doi.org/10.1115/IPC2012-90592
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