Probabilistic analysis of pipelines with corrosion defects by using FITNET FFS procedure

Published on Mar 1, 2011in Corrosion Science6.479
· DOI :10.1016/J.CORSCI.2010.10.014
Guian Qian24
Estimated H-index: 24
(Paul Scherrer Institute),
Markus Niffenegger18
Estimated H-index: 18
(Paul Scherrer Institute),
Shu-Xin Li11
Estimated H-index: 11
(Lanzhou University of Technology)
Sources
Abstract
A probabilistic method based on the corrosion module of the FITNET FFS procedure is presented to perform the structural integrity analysis for pipelines. The comparison of the failure pressure determined by both deterministic and probabilistic methods shows that even for a high safety factor, the deterministic method may predict nonconservative results. FITNET FFS procedure predicts a similar probability to that given by the Shell-92 model. The sensitivity analysis of both the uncertainty of the variables and the underlying model shows that the corrosion depth has the most significant contribution to the pipeline failure at an inspection interval of 8 years.
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