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对油气长输管道的腐蚀的类型、腐蚀的因素、腐蚀的特点进行了全面的分析,深入的阐述长输管道剩余寿命预测的基本原理。根据不同的腐蚀程度,建立基于电化学腐蚀机理的剩余寿命检测模型和腐蚀率模型,相结合剩余强度的接受准侧,对腐蚀的程度进行校准,最终确定长输管道剩余“寿命”。
This paper analyzes the types of corrosion, the factors of corrosion and the corrosion characteristics of long-distance pipeline, and expounds the basic principle of remaining life prediction of long distance pipeline. According to the different degree of corrosion, the residual life detection model and the corrosion rate model based on the electrochemical corrosion mechanism are established, and the degree of corrosion is calibrated according to the acceptance criteria of the residual strength. Finally, the remaining “life” of the long distance pipeline is determined.