Burst Capacity Solutions for Submarine Pipeline with Long Corrosion Defects

摘要

Based on the elastic-plastic, large-deformation finite element method, the failure behaviour and burst capacity of submarine pipeline with long longitudinal corrosion defects exposed to internal pressure are studied. The effect of corrosion length and corrosion location on burst capacity is discussed as well. From the FE results, a set of limit solutions are proposed to predict failure pressure of submarine pipeline made of X60 steel with long longitudinal corrosion defects. The burst capacities predicted by the proposed solutions are compared with the results from laboratory tests and various assessment methods. Consequently, it is concluded that solutions proposed in this paper are in extremely good agreement with the experimental data and give more accurate predictions than the existing assessing methods.