Reliability analysis of corroded pipelines considering 3D defect growth

Integrity management of in-service corroded pipelines depends on the applied stochastic corrosion growth model. 3D corrosion growth in axial, circumferential, and radial directions of the pipeline is modeled using dependent stochastic gamma processes. The unknown model variables are inferred from th...

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Bibliographic Details
Published inThin-walled structures Vol. 157; p. 107028
Main Authors Wang, Yihuan, Dann, Markus R., Zhang, Peng
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.12.2020
Subjects
Corrosion
Integrity management
Pipeline
Stochastic growth model
Stochastic growth model
Corrosion
Integrity management
Pipeline
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Summary:Integrity management of in-service corroded pipelines depends on the applied stochastic corrosion growth model. 3D corrosion growth in axial, circumferential, and radial directions of the pipeline is modeled using dependent stochastic gamma processes. The unknown model variables are inferred from the results of in-line inspections. The model is embedded in structural reliability analysis to estimate the time-dependent probability of leak and rupture failures of corrosion in pipelines. The results show that the effect of dependent corrosion growth in the three directions has a significant impact on the pipeline's reliability and safe remaining lifetime. •Model 3D corrosion growth in axial, circumferential, and radial directions.•Infer correlated corrosion growth using in-line inspection data.•System reliability estimation considering 3D correlated corrosion growth.
ISSN:0263-8231
1879-3223
DOI:10.1016/j.tws.2020.107028