Reliability analysis has become widely used as a method of accounting for uncertainty in the sizing of metal loss features in pipeline integrity management programs. As inline inspection (ILI) technology for crack detection becomes more widely available, the opportunity to use reliability methods in a manner similar to that already adopted for metal loss features presents itself. Nevertheless, the technical challenges to the application of reliability analysis of cracks are distinct from those that are relevant to the reliability analysis of metal loss features. Calculating the time-dependent threat of failure due to fatigue or corrosion fatigue must address different parameters than it would for metal loss features, and consequently this presents new challenges in developing statistical analysis tools. Such challenges include predicting operational pressure cycling, accounting for uncertainty in ILI crack sizing, and characterizing crack growth behaviour type. This paper provides an overview of some important parameters to be considered in reliability-based fatigue or corrosion fatigue analysis with some examples of how they have been addressed in work to date by Dynamic Risk Assessment Systems, Inc.
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2010 8th International Pipeline Conference
September 27–October 1, 2010
Calgary, Alberta, Canada
Conference Sponsors:
- International Petroleum Technology Institute and the Pipeline Division
ISBN:
978-0-7918-4423-6
PROCEEDINGS PAPER
Reliability Life Span of Fatigue Cracks
Cameron Rout,
Cameron Rout
Dynamic Risk Assessment Systems, Inc., Calgary, AB, Canada
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James Mihell,
James Mihell
Dynamic Risk Assessment Systems, Inc., Calgary, AB, Canada
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Keith Adams,
Keith Adams
Dynamic Risk Assessment Systems, Inc., Calgary, AB, Canada
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Nathan Len
Nathan Len
Dynamic Risk Assessment Systems, Inc., Calgary, AB, Canada
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Cameron Rout
Dynamic Risk Assessment Systems, Inc., Calgary, AB, Canada
James Mihell
Dynamic Risk Assessment Systems, Inc., Calgary, AB, Canada
Keith Adams
Dynamic Risk Assessment Systems, Inc., Calgary, AB, Canada
Nathan Len
Dynamic Risk Assessment Systems, Inc., Calgary, AB, Canada
Paper No:
IPC2010-31633, pp. 667-673; 7 pages
Published Online:
April 4, 2011
Citation
Rout, C, Mihell, J, Adams, K, & Len, N. "Reliability Life Span of Fatigue Cracks." Proceedings of the 2010 8th International Pipeline Conference. 2010 8th International Pipeline Conference, Volume 4. Calgary, Alberta, Canada. September 27–October 1, 2010. pp. 667-673. ASME. https://doi.org/10.1115/IPC2010-31633
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