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Assessment Methods for the Dented Pipe of Grade X80

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Advances in Materials Processing (CMC 2017)

Part of the book series: Lecture Notes in Mechanical Engineering ((LNME))

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Abstract

Dents are common defects in pipeline, and may occur during pipeline construction or in service. The dents may threaten the integrity of pipelines. To guarantee the safety operation, the assessment of plain dents is mainly based on the depth or the strain criterion. This paper reviews the basis of the criteria in different codes and the recent research of plain dents. In addition, comparisons are made between different grades of the steel in terms of mechanical properties. With the increasing grade, the strength and the yield ratio increase, but the plastic property decreases. The average UEL of X80 is only 6.2%. When the strain-based criterion is applied to the X80 pipe with dents, it needs to be demonstrated by engineering analysis.

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Author information

Authors and Affiliations

  1. China Petroleum Pipeline Research Institute Co. Ltd., Langfang, 065000, Hebei, China

    Qiaofei Sun

  2. Sci-Tech Information Center, PetroChina West to East Gas Pipeline Company, Wuhan, 430073, Hubei, China

    Lei Guo, Leilei Wang & Yi Liu

  3. Piping Department, PetroChina West to East Gas Pipeline Company, Wuhan, 430073, Hubei, China

    Dahai Zheng

Authors
  1. Qiaofei Sun
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  2. Lei Guo
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  3. Dahai Zheng
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  4. Leilei Wang
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  5. Yi Liu
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Corresponding author

Correspondence to Qiaofei Sun .

Editor information

Editors and Affiliations

  1. Chinese Materials Research Society, Beijing, China

    Yafang Han

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Sun, Q., Guo, L., Zheng, D., Wang, L., Liu, Y. (2018). Assessment Methods for the Dented Pipe of Grade X80. In: Han, Y. (eds) Advances in Materials Processing. CMC 2017. Lecture Notes in Mechanical Engineering. Springer, Singapore. https://doi.org/10.1007/978-981-13-0107-0_98

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  • DOI: https://doi.org/10.1007/978-981-13-0107-0_98

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-13-0106-3

  • Online ISBN: 978-981-13-0107-0

  • eBook Packages: EngineeringEngineering (R0)

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