Publication: Reliability assessment of thick high strength pipelines with corrosion defects
Issued Date
2019-11-01
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ISSN
03080161
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2-s2.0-85073215852
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Mahidol University
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SCOPUS
Bibliographic Citation
International Journal of Pressure Vessels and Piping. Vol.177, (2019)
Suggested Citation
U. Bhardwaj, A. P. Teixeira, C. Guedes Soares, Md Samdani Azad, W. Punurai, P. Asavadorndeja Reliability assessment of thick high strength pipelines with corrosion defects. International Journal of Pressure Vessels and Piping. Vol.177, (2019). doi:10.1016/j.ijpvp.2019.103982 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/50822
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Title
Reliability assessment of thick high strength pipelines with corrosion defects
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Abstract
© 2019 Elsevier Ltd This paper assesses the reliability of thick, high strength corroded pipelines subjected to internal pressure by first order reliability algorithms and Monte Carlo simulation methods. First, the predictions of different burst strength models, including a new prediction model for thick high strength pipelines are compared with experimental results. Model uncertainty factors are derived for intact and corroded pipelines to calibrate and introduce the uncertainties on the models used in the prediction of structural reliability. The uncertainty associated with model uncertainty factors is addressed and the best fitting distribution is identified. Extensive reliability and sensitivity analyses are carried out on intact and corroded pipes with calibrated burst strength models. Through sensitivity analyses performed for increasing levels of corrosion defects, the influence of basic parameters on the burst strength of corroded pipelines is characterized. The results demonstrate that the model uncertainty factors and the depth of corrosion are relatively important variables for corroded pipelines. The results obtained through reliability assessment are compared with that obtained by the strength model proposed in the RAMPIPE guidelines.