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Indexed by:期刊论文

Date of Publication:2008-09-01

Journal:CHINA OCEAN ENGINEERING

Included Journals:SCIE、EI、ISTIC、CSCD、Scopus

Volume:22

Issue:3

Page Number:359-370

ISSN No.:0890-5487

Key Words:submarine pipeline; corrosion defects; interaction relationship; damage mechanism; failure pressure

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 closters 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 formuations 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.