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首页> 外文期刊>Journal of pipeline engineering >Prediction of the internal corrosion remaining life of a gas pipeline made of high-strength steel
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Prediction of the internal corrosion remaining life of a gas pipeline made of high-strength steel

机译：预测高强度钢制燃气管道的内部腐蚀剩余寿命

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摘要

During the operation of a high-strength steel compressible gas pipeline, the corrosion rates in the strongly turbulent position near the inner wall of the pipe are higher than the average corrosion rates. These changes lead to internal corrosion defects of the pipeline. In this work, a finite-element pipe model was built based on the working conditions of an X-70 pipeline in the West-to-East Natural Gas Transmission Project. The stress distributions in the inner-wall of the pipe under different types of semi-elliptical defects were calculated by a time-domain method with fluid-structure interaction. In the stress-distribution simulation, the failure-pressure formula of the high-strength steel pipe with semi-elliptical defects under the influence of the flow was fitted based on the Marquardt method. The prediction formula of the internal corrosion remaining life of the high-strength steel gas pipe was established according to the de Waard corrosion model modified by the flow.The prediction for the semi-elliptical defect parameters shows that depth has the strongest effect on the failure pressure of the pipe, whereas width has the least effect. Based on the formula obtained, the failure-pressure prediction of the pipe with defects under the influence of the flow was slightly lower than the experimental data under a simple internal pressure load. Under stable operating conditions, the inclination angle had the largest effect on the internal corrosion and remaining life of the high-strength steel gas pipeline.This prediction method provides an opportunity for more-targeted on-site inspections of long-distance gas pipelines made of high-strength steel.
机译：在高强度钢可压缩气体管道的运行过程中，靠近管道内壁的强湍流位置的腐蚀速率高于平均腐蚀速率。这些变化导致管道的内部腐蚀缺陷。在这项工作中，根据西气东输工程中X-70管道的工作条件，建立了有限元管道模型。通过时域方法，采用流固耦合的方法，计算了不同类型的半椭圆形缺陷下管道内壁的应力分布。在应力分布模拟中，基于Marquardt法拟合了半椭圆缺陷高强度钢管在流动影响下的破坏压力公式。根据气流修正的de Waard腐蚀模型，建立了高强度钢管的内部腐蚀剩余寿命的预测公式，对半椭圆缺陷参数的预测表明深度对破坏的影响最大。管道的最大压力，而宽度影响最小。根据获得的公式，在简单的内部压力载荷下，在流动影响下有缺陷的管道的失效压力预测值略低于实验数据。在稳定的工作条件下，倾角对高强度钢制燃气管道的内部腐蚀和剩余寿命的影响最大，这种预测方法为以这种方式制成的长距离燃气管道的更有针对性的现场检查提供了机会高强度钢。

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  • 来源
    《Journal of pipeline engineering》 |2016年第3期|177-186|共10页
  • 作者

    Yue Cui; Hui-qing Lan; Ren-yang He; Chao-hui Zhang;

  • 作者单位

    School of Mechanical, Electronic, and Control Engineering, Jiaotong University, Beijing, China,Tang Steel Company, He Steel Group,TangShan, HeBei, China;

    School of Mechanical, Electronic, and Control Engineering, Jiaotong University, Beijing, China;

    China Special Equipment Inspection and Research Institute, Beijing, China;

    School of Mechanical, Electronic, and Control Engineering, Jiaotong University, Beijing, China;

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