In this work, several industrial codes that are available for assessment of pipeline failure pressure were evaluated with respect to the grade of pipeline steels and the geometry of corrosion defect. A novel, finite element-based CX model was developed to simulate the complex stress/strain conditions exerted on high-strength steel pipelines due to the synergism of internal pressure, soil strain and local stress concentration at corrosion defects. The effect of mechanical-electrochemical interaction on the steel corrosion was determined both mechanistically and quantitatively for reliable prediction of the propagation of corrosion defects.

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