| Study on Interaction Relationship for Submarine Pipeline with Axial Corrosion Defects |
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| 作者姓名： | 陈严飞 李昕 周晶 关炯 |
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| 作者单位： | State Key Laboratory of Coastal and Offshore Engineering，Dalian University of Technology，IKM Ocean Design，Postboks 994064 |
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| 基金项目： | 国家自然科学基金，教育部科学技术研究项目 |
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| 摘 要： | Corrosion is one of the main reasons to cause the operation accident of submarine oil and gas transmission pipelines. As the major corrosion pattern in submarine pipelines, the effects of corrosion clusters consisting of the adjacent corrosion defects on failure pressure are investigated through non-linear large-deformation finite element method. Typically, the failure behavior and limit strength of submarine pipeline with axial groove-groove corrosion defect pair exposed to internal pressure are analyzed. The effects of corrosion depth and axial spacing between a pair of corrosion defects on failure pressure are concluded. An interaction relationship for corrosion defects in pipelines, as well as prediction formulations for assessing the remaining strength of corroded pipelines are proposed. The expressions based on the proposed interaction relationship give more accurate results than the methods used in the existing design guidelines.
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| 关 键 词： | 海底管道 防锈缺陷 相互关系 故障压力 |
Study on Interaction Relationship for Submarine Pipeline with Axial Corrosion Defects |
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| CHEN Yan-fei,LI Xin,ZHOU Jing,GUAN Jiong.Study on Interaction Relationship for Submarine Pipeline with Axial Corrosion Defects[J].China Ocean Engineering,2008,22(3). |
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| Authors: | CHEN Yan-fei LI Xin ZHOU Jing GUAN Jiong |
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| Institution: | [1]State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China [2]IKM Ocean Design, Postboks 99 4064, Stavanger, Norway |
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| Abstract: | Corrosion is one of the main reasons to cause the operation accident of submarine oil and gas transmission pipelines. As the major corrosion pattern in submarine pipelines, the effects of corrosion clusters consisting of the adjacent corrosion defects on failure pressure are investigated through non-linear large-deformation finite element method. Typically, the failure behavior and limit strength of submarine pipeline with axial groove-groove corrosion defect pair exposed to internal pressure are analyzed. The effects of corrosion depth and axial spacing between a pair of corrosion defects on failure pressure are concluded. An interaction relationship for corrosion defects in pipelines, as well as prediction formulations for assessing the remaining strength of corroded pipelines are proposed. The expressions based on the proposed interaction relationship give more accurate results than the methods used in the existing design guidelines. |
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| Keywords: | submarine pipeline corrosion defects interaction relationship damage mechanism failure pressure |
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