Pipeline is the common mode for transporting oil, gas, and various petroleum products. Aging and corrosive environment may lead to formation of various defects such as crack, dent, gouge, and corrosion. The performance evaluation of field pipelines with crack defect is important. Accurate assessment of crack depth and remaining fatigue life of pipelines with crack defect is vital for pipeline’s structural integrity, inspection interval, management, and maintenance. An experimental based research work was completed at the University of Windsor for developing a semi-empirical model for estimating the remaining fatigue life of oil and gas pipes when a longitudinal crack defect has formed. A statistical approach in conjunction with fracture mechanics was used to develop this model. Statistical analysis was undertaken on CT specimen data to develop this fatigue life assessment model. Finite element method was used for determining the stress intensity factor. The fatigue life assessment model was then validated using full-scale fatigue test data obtained from 762 mm (30 inch) diameter X65 pipe. This paper discusses the test specimens and test data obtained from this study. Development and validation of the fatigue life assessment model is also presented in this paper.
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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:
978-0-7918-4513-4
PROCEEDINGS PAPER
Fatigue Life Assessment for NPS30 Steel Pipe
Jorge Silva,
Jorge Silva
University of Windsor, Windsor, ON, Canada
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Hossein Ghaednia,
Hossein Ghaednia
University of Windsor, Windsor, ON, Canada
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Sreekanta Das
Sreekanta Das
University of Windsor, Windsor, ON, Canada
Search for other works by this author on:
Jorge Silva
University of Windsor, Windsor, ON, Canada
Hossein Ghaednia
University of Windsor, Windsor, ON, Canada
Sreekanta Das
University of Windsor, Windsor, ON, Canada
Paper No:
IPC2012-90081, pp. 619-624; 6 pages
Published Online:
July 25, 2013
Citation
Silva, J, Ghaednia, H, & Das, S. "Fatigue Life Assessment for NPS30 Steel Pipe." Proceedings of the 2012 9th International Pipeline Conference. Volume 2: Pipeline Integrity Management. Calgary, Alberta, Canada. September 24–28, 2012. pp. 619-624. ASME. https://doi.org/10.1115/IPC2012-90081
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