Abstract
The importance of reliability-based design and assessment has been widely recognized by the pipeline industry. Thus, this paper aims at providing comprehensive reliability assessment of intact and defected pipes subjected to internal pressure based on the CSA Z662:19. Various limit states related the pipe design, pre-commission hydrostatic testing, and operation are studied. Specifically, both corrosion and crack defects are considered for pipeline integrity assessment based on different defect scenarios. Reliability results, or probabilities of failure, are reported with respect to design factors, hydrostatic test pressure factors, and safety factors, which can be used in designing new pipes, determining the applied pressure in hydrostatic tests, and operation pressure control of defected pipes, respectively. The effects of pipe grade, pipe dimensions (i.e., diameter and wall thickness), corrosion or crack defect sizes (e.g., length and depth), and internal pressure on POFs for different limit states are also investigated.
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