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首页> 外文期刊>Applied Computational Electromagnetics Society journal >A Method Using Magnetic Eddy Current Testing for Distinguishing ID and OD Defects of Pipelines under Saturation Magnetization
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A Method Using Magnetic Eddy Current Testing for Distinguishing ID and OD Defects of Pipelines under Saturation Magnetization

机译：一种使用磁涡电流测试的方法，以区分饱和磁化管线ID和OD缺陷

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摘要

Distinguishing the inside (ID) and outside (OD) defect is an essential problem for the oil and gas pipeline nondestructive testing in engineering. The most widely used solution is to combine a magnetic flux leakage (MFL) section and a second section. For the strong magnetic field environment of the MFL, the second section and the MFL section are usually located at different mechanical positions, which leads to an increase in the length of the pipeline inspection gauge (PIG) and a decrease in the reliability. In this paper, a new impedance measurement method and the concept of the defect impedance angle are proposed to distinguish the ID and OD defects of pipelines under saturation magnetization, which based on the magnetic eddy current testing (MECT). The proposed ID & OD detection method can work with the MFL in the same mechanical position. Meanwhile, the proposed method also has the advantage that the discrimination criteria of the ID and OD defect keeps consistent with the classic eddy current testing (ECT). Furthermore, the robustness and sensitivity of the proposed method are discussed and verified by physical experiments.
机译：区分内部（ID）和外部（OD）缺陷是工程中石油和天然气管道无损检测的重要问题。最广泛使用的解决方案是将磁通泄漏（MFL）部分和第二部分组合。对于MFL的强磁场环境，第二部分和MFL部分通常位于不同的机械位置，这导致管道检查量表（猪）的长度的增加和可靠性的降低。本文提出了一种新的阻抗测量方法和缺陷阻抗角度的概念，以区分饱和磁化下管道的ID和OD缺陷，这基于磁涡流测试（MECT）。所提出的ID和OD检测方法可以使用相同机械位置的MFL。同时，所提出的方法还具有以下优点，即ID和OD缺陷的判别标准与经典涡流测试（ECT）一致。此外，通过物理实验讨论和验证了所提出的方法的鲁棒性和灵敏度。

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