Pressure surges may lead to low-pressure failures

A strain-amplification phenomenon sometimes associated with pressure surges in liquid petroleum pipelines may cause a latent defect in a pipeline to fail at an unexpectedly low pressure. Pipeline operators need to account for this phenomenon in their integrity management plans for those pipelines or pipeline segments that are likely to be exposed to significant pressure surges.Most liquid pipelines and some gas pipelines are subject to pressure surges during their operation. Pressure surges can occur during start-up and shutdown, and under transient conditions such as loss of power to the pumps, inadvertent rapid valve closure, and vapor pocket collapse. Any event that rapidly disrupts th...

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