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本文采用双臂电桥,对两个电厂的石墨化碳钢管道进行了电阻率的测试。测试结果发现石墨化级别高低与电阻率大小呈线性关系。试验得出,电阻率为19.5 μΩ·cm时石墨化为3.5级;电阻率为20 μΩ·cm时石墨化已达四级。此时应考虑换管。
In this paper, double-arm bridge was used to test the resistivity of the graphitized carbon steel pipes of two power plants. The test results show that the level of graphitization and the resistivity of a linear relationship. Test results showed that the resistivity of 19.5 μΩ · cm graphitization to 3.5; resistivity of 20 μΩ · cm graphitization reached four. At this point should consider changing pipe.