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Ultimate Load Capacity of Offshore Pipeline with Arbitrary Shape Corrosion Defects |
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| Authors: | CHEN Yan-fei ZHANG Juan ZHANG Hong LIU Xiao-ben LI Xin ZHOU Jing and CAO Jing |
| Institution: | National Engineering Laboratory for Pipeline Safety/Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum, Beijing 102246, China;PowerChina Beijing Engineering Corporation Limited, Beijing 100024, China;National Engineering Laboratory for Pipeline Safety/Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum, Beijing 102246, China;National Engineering Laboratory for Pipeline Safety/Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum, Beijing 102246, China;State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;CNOOC Research Institute, Beijing 100024, China |
| Abstract: | A set of generalized solutions are proposed for estimating ultimate load capacity of pipeline with arbitrary corrosion shapes subjected to combined internal pressure, axial force and bending moment. Isotropic and anisotropic material characteristics in longitudinal and circumferential direction of pipeline are also considered in the proposed equations. Simplified numerical method is used to solve the generalized expressions. The comparisons of numerical results based generalized solutions and full-scale experimental results are carried out. The predicted results agree reasonably well with the experiment results. Meanwhile, the effects of corrosion shapes and locations on the ultimate load capacity are studied. |
| Keywords: | offshore pipeline arbitrary shaped corrosion defects ultimate load capacity combined loads |
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