绝缘接头（法兰）绝缘性能和管内电流是阴极保护参数中较为重要的数据。采用GB/T 21246-2007中推荐的各种方法，对长庆油田靖边集输管道系统进行绝缘性能和管内电流测试研究。通过数据分析，结合数值分析、误差分析等对国标中推荐的测试方法进行了分析讨论。研究结果表明：电位法和PCM漏电率法适用于在役绝缘接头（法兰）的绝缘性能测试，两者结合使用可以提高测量的准确性。仪器测量精度不够导致漏电电阻法和接地电阻测量仪法不适用于绝缘接头（法兰）的绝缘性能测试。电压降法和标定法适用于管内电流的测量。对这些方法的现场应用提出了一些有益的建议。

Performance of insulation joint (flange) and in-pipe current are important data of cathodic protection parameters. The various methods recommended in GB/T 21246-2007 were adopted to study the insulation performance and current test of Jingbian gathering and transportation pipeline system in Changqing oilfield. Through data analysis, combined with numerical analysis and error analysis, the recommended test methods in the national standard were analyzed and discussed. The results show that the potential method and PCM leakage rate method are suitable for insulation performance test of in-service insulated joints (flanges), and the combination of the two methods can improve the accuracy of measurement. Due to the inaccuracy of instrument measurement, leakage resistance method and grounding resistance measurement instrument method are not suitable for insulation performance test of insulated joints (flanges). Voltage drop method and calibration method are applicable to the measurement of current in the pipe. Some useful suggestions for the field application of these methods are put forward.