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Structural Reliability Assessment of Subsea Pipelines Against LocalBuckling Considering Corrosion Defects

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Year: 2017
COI code: MECHAERO02_406
Paper Language: English

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Authors Structural Reliability Assessment of Subsea Pipelines Against LocalBuckling Considering Corrosion Defects

  Seyed Mohammad Hossein Sharifi - Department of Mechanical Engineering, Petroleum University of Technology, Ahwaz, Iran
  Mohammad Mahdi Shabani - Department of Ocean Engineering, Petroleum University of Technology, Mazandaran, Iran


Buckling as the most probable deteriorative phenomena’s cause stopping operation and incurring too much cost for the repairing (or replacing in some cases) of some line pipes. Buckling is classified into two categories; local and global buckling. Global buckling occurs due to high pressure and temperature gradients along the pipeline length. The insufficient bending capacity of subsea with ovality in pipelinecross section cause local buckling.DNV-OS-F101 is recommended a criterion for load-controlled and displacement-controlled conditions. In this paper, ABAQUS Finite Element (FE) is developed to obtain the maximum stresses and maximum deflection induced by the external pressure. Then, DNV-recommended criterion for the local buckling of the subsea pipeline is applied to estimate the reliability index considering the uncertainty in three parameters (modulus of elasticity, pipeline wall thickness, water depth) in different in-service time of pipelines (by considering corrosive agents). It is concluded that FORM can be applicable for the reliability assessment of pipeline against local buckling (considering external overpressure only), furthermore, the variation of importance measurement (alpha importance) is too low during the service lifetime of pipeline that the same value of intact pipeline can be for both intact and corroded pipeline


subsea pipeline, local buckling, reliability

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COI code: MECHAERO02_406

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Sharifi, Seyed Mohammad Hossein & Mohammad Mahdi Shabani, 2017, Structural Reliability Assessment of Subsea Pipelines Against LocalBuckling Considering Corrosion Defects, 2nd International Conference on Mechanical Engineering and Aerospace, تهران, موسسه آموزش عالي نيكان, the text, wherever referred to or an achievement of this article is mentioned, after mentioning the article, inside the parental, the following specifications are written.
First Time: (Sharifi, Seyed Mohammad Hossein & Mohammad Mahdi Shabani, 2017)
Second and more: (Sharifi & Shabani, 2017)
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The University/Research Center Information:
Type: state university
Paper No.: 1811
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