Case Study: Assessment of fatigue of a subsea pipeline including analyis of dents The scope A major operator was planning to re-develop two of their existing elds in the United Kingdom continental shelf (UKCS). It was anticipated that the re-development would result in greater production yields and increase the life of the eld. Two import/export trunklines transported produced gas and, as a result of the re-development, the throughput in both pipelines was expected to increase, resulting in higher operating pressures. The operator asked us to perform a study to determine the fatigue lives of the two pipelines at the current and higher operating pressures. Furthermore, a previous anchor strike to one of the trunklines had resulted in damage to the external coating, raising concern

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