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本文介绍了埋地钢质管道交流杂散电流的形成原因及危害,并对其测试方法、干扰程度评价指标、防护措施进行了分析讨论。比较了国内外不同标准对于交流干扰程度的评价指标,对比了交流杂散电流常见接地排流方式的适用条件及优缺点。结合现场检验实例阐述了交流干扰评价中存在的问题,希望管道检测人员以及业主对此引起足够的重视。
This paper introduces the causes and the hazards of AC stray current in buried steel pipelines, and discusses the testing methods, evaluation indexes of disturbance degree and protective measures. Compares the evaluation criteria of different standards at home and abroad for the degree of AC interference and compares the applicable conditions and the advantages and disadvantages of the common ground drain method of AC stray current. Combined with the field test example, the problems existing in the evaluation of AC interference are expatiated. It is hoped that pipeline inspectors and owners will pay enough attention to this problem.