Model helps prevent failures from pressure-induced fatigue

HYDROSTATIC TESTING-ConclusionLiquid pipeline service failures have occurred because of pressure-cycle-induced fatigue crack growth of defects.1 Our own familiarity with this phenomenon suggests that it may be more common than the public record reveals.Such failures have also been prevented, however, by preemptive responses by pipeline operators worldwide.This final of two articles on hydrostatic testing presents a technique that has assisted operators in addressing and controlling pressure-cycle-induced fatigue crack growth.Part 1 of this series (OGJ, July 31, 2000, p. 54) presented findings related to the use of hydrostatic testing to verify pipeline integrity.Crack growthAs constructed...

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