筒体纵缝超声波探伤缺陷定位计算

Defect Position Calculation in Ultrasonic Wave Detecting for Cylindrical Body Longitudinal Seam

本文介绍了简体纵缝超声波探伤缺陷定位计算公式及采用图表法求解缺陷位置的简便方法。

In the detection of weld seams of boilers and pressure vessls, the cylindrical body longitudinal seams are often met. But the defect positions of such seams are more complex than these of butt joints of flat plates. In this article the position calculation formula for the first and secand sonic range detection is deduced when the detecting head locates into the outer and inner circles, and al- so the simple method for derivating the defect position with diagram method is introduced.