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Stochastic process-based models are developed to characterize the generation and growth of metal-loss corrosion defects on oil and gas steel pipelines. The generation of corrosion defects over time is characterized by the non-homogenous Poisson process, and the growth of depths of individual defects is modeled by the non-homogenous gamma process (NHGP). The defect generation and growth models are...
The model errors associated with eight well-known burst capacity models for corroded pipelines, namely B31G, B31G Modified, CPS, the CSA model, the DNV model, PCORRC, RSTRENG and SHELL92, are characterized based on a full-scale burst test database that consists of 150 data points collected from the literature for pipe specimens containing single isolated real corrosion defects. The probabilistic characteristics...
This paper presents a methodology to evaluate the time-dependent system reliability of corroding pipeline segment containing multiple spatially-correlated active corrosion defects. The pipeline segment is modeled as a series system considering three distinctive failure modes at a given corrosion defect. The defect depth growth is modeled using gamma distributed time-independent growth model and gamma...
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