An offshore pipeline may experience overstress due to improper installation, an accident or other unplanned incidents. An assessment of potential damage in the pipeline is important, since it allows operators to determine whether the pipeline can operate under planned conditions, reduced conditions or must be repaired, which may have significant technical and financial consequences. However, such an assessment can be challenging because of the many unknown parameters in the field and pressing project schedule. Therefore, planning and conducting an efficient assessment study becomes particularly important under such circumstances. This paper describes an analysis methodology that addresses the following aspects of the pipeline damage assessment: relevant criteria, reconstructing and modeling the sequence of events, and required numerical simulations. Criteria that determine acceptability of the affected pipeline could be the original design criteria or less stringent fit-for-service criteria that, nevertheless, call for additional material information and more detailed analyses. The sequence of events and characteristics of the relevant loads are often not readily clear, and reconstruction of the events may constitute a significant part of the assessment study. The attempt to determine the level of pipe damage/overstress usually starts with simple approximations but oftentimes eventually requires sophisticated numerical simulations. A modeling approach that comprises gradual levels of details and necessary levels of accuracy and efficiency is presented and discussed in this paper.

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