管道母材超声波检测不属于《在用工业管道定期检验规程》要求的被检件。根据失效案例, 增加了此项检测。介绍了纵向缺陷的检测方法和参数, 分析缺陷产生原因, 着重介绍两个对比试块的制作、探头的磨制和使用, 分析了探头错误磨制方法的危害。经超声波检测发现管道存在超标信号, 更换了存在超标信号的管子, 至今运行两年未发现异常。

Ultrasonic testing of hydrogen pipeline in service does not belong to the standard requirements. According to failure cases, the ultrasonic testing has been increased. The test method of longitudinal defect and parameters of ultrasonic testing have been introduced, the defect causes have been analyzed. The production method of the two kinds test block, the grinding method of the probe, the using method of the probe, the harm of grinding probe errors have been to highlight. After ultrasonic testing, superscalar signals of pipeline have been discovered and the hydrogen pipeline has been replaced. So far, the pipeline has been running for two years, no abnormal condition were found.