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A damage model for assessing pipeline safety in corrosion environments

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Abstract

Considering such practical pipeline service conditions in the petroleum transportation field as corrosion from harmful media (H2S, CO2 etc.) and load from the pressure of flowing petroleum as key factors, the degradation of the mechanical properties of pipeline steels and the corresponding variations in stress states are studied. A damage variable is introduced to reflect the degradation in the mechanical properties of the pipeline due to corrosion. A diluted solution approach is proposed to model the corrosion process of harmful media within the pipeline and the distribution of the damage variable along the radial direction of the pipeline is derived. An approach to the safety evaluation of damaged pipeline is proposed by comparing the instant properties of pipeline steels with servicing conditions.

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Authors and Affiliations

  1. State Key Laboratory for Mechanical Behavior of Materials, Xian Jiaotong University, 710049, Xian, P. R. China

    X. W. Zhao & M. Zheng

  2. Tubular Good Research Center of China National Petroleum Corporation, 710065, Xian, P R China

    X. W. Zhao, J. H. Luo, M. X. Lu & H. L. Li

Authors
  1. X. W. Zhao
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  2. J. H. Luo
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  3. M. Zheng
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  4. M. X. Lu
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  5. H. L. Li
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Zhao, X.W., Luo, J.H., Zheng, M. et al. A damage model for assessing pipeline safety in corrosion environments. Met. Mater. Int. 8, 479–485 (2002). https://doi.org/10.1007/BF03027246

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  • DOI: https://doi.org/10.1007/BF03027246

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