Pipeline Integrity Management Under Geohazard Conditions (PIMG)
Chapter 24 TENSILE STRAIN CAPACITY MODEL, FULL-SCALE TESTING, SAFETY FACTOR DERIVATION, AND BENCHMARK EXAMPLE CALCULATIONS
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This paper describes a tensile strain capacity (TSC) prediction model and how ~ 100 full-scale pipe strain capacity tests were used to derive a safety factor for use in either pipeline design or strain-based engineering critical assessment (SBECA). The safety factor accounts for the difference between model predictions and test results thus providing a quantifiable degree of reliability. The safety factor is generated from a 95% upper confidence limit on the ratio of predicted-to-measured TSC. The practical meaning of this is that if either TSC or tolerable defect size is calculated using the model, then the probability of being...