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<p>A process pipeline at a shale gas platform showed severe wall thinning shortly after entering service. Located in a gas gathering station, the pipeline transports raw gas from the well to a sand separator. Inspection of the blind pipe revealed six defects with depths over 20%, and ASME B31G-2009 evaluation confirmed that three did not meet operational standards. To address erosion and erosion-induced corrosion, a gas-solid two-phase flow erosion model was developed in Fluent based on actual conditions. By comparing different blind pipe depths and bottom curvatures, the study found that setting the depth to 30 mm and curvature to 20&#xa0;m<sup>−1</sup> significantly reduces erosion and improves long-term reliability. The results offer practical guidance for pipeline design and maintenance in shale gas systems.</p>

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Evaluation of Defects and Structural Optimization of Shale Gas Process Blind Pipe

  • 期刊论文

  • 发表日期：

    2025年6月22日

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  • Yong Chen,
  • Ruifei Xie,
  • Dongying Meng,
  • Yan Wang,
  • Ziyi Liu

摘要

A process pipeline at a shale gas platform showed severe wall thinning shortly after entering service. Located in a gas gathering station, the pipeline transports raw gas from the well to a sand separator. Inspection of the blind pipe revealed six defects with depths over 20%, and ASME B31G-2009 evaluation confirmed that three did not meet operational standards. To address erosion and erosion-induced corrosion, a gas-solid two-phase flow erosion model was developed in Fluent based on actual conditions. By comparing different blind pipe depths and bottom curvatures, the study found that setting the depth to 30 mm and curvature to 20 m−1 significantly reduces erosion and improves long-term reliability. The results offer practical guidance for pipeline design and maintenance in shale gas systems.