In this paper, a quantitative study on stress corrosion crack growth in large diameter gas pipelines is presented. Finite element method is applied for determining stress intensity factor at the crack tip. First a small semi-elliptical axial surface crack is assumed. Then internal gas pressure and residual stress, induced from welding process, are considered. Applied forces and crack growth rate are calculated as a function of stress intensity factor based on an empirical equation. Crack front shape is determined by calculating stress intensity factor distributions along the crack tip. As a result, the effect of residual stress on stress intensity factor and therefore crack growth is determined. In addition, minimum crack size that activates the stress corrosion cracking mechanism is determined. It is shown that the applied method could be used to estimate the reliable life of pipeline and the suitable time for inspection of the pipeline’s surface.
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ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering
June 15–20, 2008
Estoril, Portugal
Conference Sponsors:
- Ocean, Offshore and Arctic Engineering Division
ISBN:
978-0-7918-4820-3
PROCEEDINGS PAPER
Simulation of Residual Stress Effect on Stress Corrosion Crack Growth in Gas Pipelines Available to Purchase
M. R. Fourozan,
M. R. Fourozan
Isfahan University of Technology, Isfahan, Iran
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M. Olfatnia,
M. Olfatnia
Nanyang Technological University, Singapore, Singapore
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S. J. Golestaneh
S. J. Golestaneh
Sadid Pipe & Equipment Co., Tehran, Iran
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M. R. Fourozan
Isfahan University of Technology, Isfahan, Iran
M. Olfatnia
Nanyang Technological University, Singapore, Singapore
S. J. Golestaneh
Sadid Pipe & Equipment Co., Tehran, Iran
Paper No:
OMAE2008-57495, pp. 457-462; 6 pages
Published Online:
July 27, 2009
Citation
Fourozan, MR, Olfatnia, M, & Golestaneh, SJ. "Simulation of Residual Stress Effect on Stress Corrosion Crack Growth in Gas Pipelines." Proceedings of the ASME 2008 27th International Conference on Offshore Mechanics and Arctic Engineering. Volume 3: Pipeline and Riser Technology; Ocean Space Utilization. Estoril, Portugal. June 15–20, 2008. pp. 457-462. ASME. https://doi.org/10.1115/OMAE2008-57495
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