介绍了全自动超声波检测技术在管道对接环焊缝检测中的应用。采用全自动超声波检测、手动超声波检测以及射线检测方法对预制缺陷进行了检测。通过金相解剖对比三种检测方法的优劣，发现全自动超声波检测技术的优势和发展潜力，得出超声波衍射时差法结合超声脉冲反射法可有效检测管道对接环焊缝缺陷。

The application of automatic ultrasonic testing for the inspection of butt girth welds of pipeline was introduced. Automatic ultrasonic testing, manual ultrasonic testing and radiographic testing techniques were used on the inspection of embedded defects. Comparisons between existing testing results showed that automatic ultrasonic testing had great advantages and bright application future. Final conclusion was drawn that the combination of both time of flight diffraction technique and pulse echo technique was effective for the butt girth welds testing of pipeline.