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Title: Rational test pressure levels for mitigating the pipe-manufacturing-defect integrity threat in natural gas pipelines
Category: Technical papers from the Journal of Pipeline Engineering
Downloadable: Yes 
Project No.:
Research Agency:
Catalog No.: 2396s
Date of Publication: 2017-03-01
Price: $25.00 US
Authors: Michael J Rosenfeld and Dr Jing Ma
Abstract: Present guidance documents indicate that a pressure test to 1.25 times the MAOP is adequate to mitigate the integrity threat posed by pipe-manufacturing defects. There is strong evidence that this is sound for pipe operating at the highest stresses but also that a larger test- pressure ratio may be appropriate for pipe operating at lower stresses [1]. A probabilistic analysis has been implemented to enable the specification of a test-pressure ratio tailored to the operating stress level, target time-to- failure, and failure probability, accounting for expected variability in operating conditions, material properties, fatigue-crack-growth rate, and location classes.
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