In pipeline integrity threat management, the comparison of In-Line Inspection (ILI) and field results (trending) is typically used as an effective approach to determine the performance of ILI tool. ILI and field trending typically influences the integrity threat management of unmitigated features. Hence, pipeline operators should ensure collecting an adequate number of excavated ILI features from the field which are statistically relevant and represent the entire population of ILI data. The number of the trended data points is considered a sample from the entire population of ILI reported features. Nevertheless, it is considered a biased sample since it is drawn from the ILI population based on selective threat mitigation criteria. This paper describes several sampling methodologies with a focus on advantages and disadvantages of each approach. A Bayesian approach is introduced as an appropriate approach to the integrity sampling problem.
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2016 11th International Pipeline Conference
September 26–30, 2016
Calgary, Alberta, Canada
Conference Sponsors:
- Pipeline Division
ISBN:
978-0-7918-5027-5
PROCEEDINGS PAPER
Statistical Relevance of ILI and Field Trending
Mona Abdolrazaghi,
Mona Abdolrazaghi
Enbridge Liquids Pipelines, Edmonton, AB, Canada
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Yvan Hubert,
Yvan Hubert
Enbridge Liquids Pipelines, Edmonton, AB, Canada
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Sherif Hassanien
Sherif Hassanien
Enbridge Liquids Pipelines, Edmonton, AB, Canada
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Mona Abdolrazaghi
Enbridge Liquids Pipelines, Edmonton, AB, Canada
Yvan Hubert
Enbridge Liquids Pipelines, Edmonton, AB, Canada
Sherif Hassanien
Enbridge Liquids Pipelines, Edmonton, AB, Canada
Paper No:
IPC2016-64127, V003T04A027; 8 pages
Published Online:
November 10, 2016
Citation
Abdolrazaghi, M, Hubert, Y, & Hassanien, S. "Statistical Relevance of ILI and Field Trending." Proceedings of the 2016 11th International Pipeline Conference. Volume 3: Operations, Monitoring and Maintenance; Materials and Joining. Calgary, Alberta, Canada. September 26–30, 2016. V003T04A027. ASME. https://doi.org/10.1115/IPC2016-64127
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