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<p>This study employed the efficacy of cured-in-place pipe (CIPP) technology for the trenchless repair of high-pressure CO<sub>2</sub> pipelines with perforation defects. A finite element model was developed in ANSYS to analyze the maximum von Mises stress in the repaired pipeline and the post-repair stress redistribution. The reinforcement performance of carbon fiber, epoxy resin glass fiber, and epoxy resin carbon fiber composite liners was evaluated using yield strength as the failure criterion to ensure engineering conservatism. Results demonstrate that the maximum von Mises stress concentrates at the leak orifice and is effectively mitigated by the CIPP liners. Quantitative analysis reveals that carbon fiber achieves the highest reinforcement efficiency, with an average stress reduction of 1.07&#xa0;MPa per 1% thickness increase, compared to 0.95&#xa0;MPa and 0.35&#xa0;MPa for the epoxy resin carbon fiber composite and epoxy resin glass fiber, respectively. A comprehensive evaluation using the analytic hierarchy process indicates that carbon fiber is the optimal choice for high-performance applications, while the epoxy resin carbon fiber composite provides a cost-effective alternative for budget-constrained projects. This research establishes a theoretical framework and technical guidance for the structural reinforcement of high-pressure CO<sub>2</sub> pipelines.</p>

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Research on the Application of CIPP Inversion Lining Pressure Repair Technology for Reinforcing Pipeline Defects in CCUS Systems

  • 期刊论文

  • 发表日期：

    2026年3月9日

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  • Xin Wang,
  • Hang Chen,
  • Shibo Fu,
  • Qidong Hou,
  • Jianhui Wu,
  • Dong Li,
  • Lan Meng,
  • Xuefeng Zhao

摘要

This study employed the efficacy of cured-in-place pipe (CIPP) technology for the trenchless repair of high-pressure CO2 pipelines with perforation defects. A finite element model was developed in ANSYS to analyze the maximum von Mises stress in the repaired pipeline and the post-repair stress redistribution. The reinforcement performance of carbon fiber, epoxy resin glass fiber, and epoxy resin carbon fiber composite liners was evaluated using yield strength as the failure criterion to ensure engineering conservatism. Results demonstrate that the maximum von Mises stress concentrates at the leak orifice and is effectively mitigated by the CIPP liners. Quantitative analysis reveals that carbon fiber achieves the highest reinforcement efficiency, with an average stress reduction of 1.07 MPa per 1% thickness increase, compared to 0.95 MPa and 0.35 MPa for the epoxy resin carbon fiber composite and epoxy resin glass fiber, respectively. A comprehensive evaluation using the analytic hierarchy process indicates that carbon fiber is the optimal choice for high-performance applications, while the epoxy resin carbon fiber composite provides a cost-effective alternative for budget-constrained projects. This research establishes a theoretical framework and technical guidance for the structural reinforcement of high-pressure CO2 pipelines.