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Springback Coefficient Research of API X60 Pipe with Dent Defect

Author

Listed:
  • Peng Zhang

    (School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610000, China)

  • Yunfei Huang

    (School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610000, China)

  • Ying Wu

    (School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu 610000, China)

Abstract

Dent is a common form of defect on oil and gas pipeline. Some dents will undergo elastic or plastic recovery due to changes in internal pressure, also known as springback. To analyze the springback law of an API X60 pipeline with a dent defect, the secondary development technology of finite element software ABAQUS was used for parametric modeling of a dented pipeline. Using this model, the effects of various factors (wall thickness, internal pressure, indenter size, dent location, and dent depth) on the springback coefficient of a dented pipeline were analyzed. The significance of each factor was analyzed by combining an orthogonal experimental design with the Grey correlation degree. Finally, nonlinear regression analysis was used to obtain formulas for the springback coefficient as a function of the influential factors. The results show that the springback coefficient of the dented pipeline after pressurization was between 0.15 and 0.65, and the factor that had the largest effect on the springback coefficient was the dent location. The springback coefficient of the dented pipeline after de-pressurization was between 1.1 and 1.5, and the factor that had the largest effect on the springback coefficient was the internal pressure. The formulas that relate the springback coefficient and various influential factors can be used as a reference for estimating the springback of dented pipelines.

Suggested Citation

  • Peng Zhang & Yunfei Huang & Ying Wu, 2018. "Springback Coefficient Research of API X60 Pipe with Dent Defect," Energies, MDPI, vol. 11(11), pages 1-17, November.
    • Handle: RePEc:gam:jeners:v:11:y:2018:i:11:p:3213-:d:184016
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    References listed on IDEAS

    as
    1. Yuki Toyoshima & Shigeyuki Hamori, 2018. "Measuring the Time-Frequency Dynamics of Return and Volatility Connectedness in Global Crude Oil Markets," Energies, MDPI, vol. 11(11), pages 1-18, October.
    2. Girma T. Chala & Abd Rashid Abd Aziz & Ftwi Y. Hagos, 2018. "Natural Gas Engine Technologies: Challenges and Energy Sustainability Issue," Energies, MDPI, vol. 11(11), pages 1-44, October.
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    Cited by:

    1. Liping Tang & Wei He & Xiaohua Zhu & Yunlai Zhou, 2019. "Sealing Performance Analysis of an End Fitting for Marine Unbonded Flexible Pipes Based on Hydraulic-Thermal Finite Element Modeling," Energies, MDPI, vol. 12(11), pages 1-14, June.

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