压力容器定期检验体积缺陷高度的简易检测

利用曝光曲线和胶片特性曲线,推导了焊缝内部体积缺陷高度的计算公式,缺陷高度计算公式适应于焊缝表面比较平滑的体积型缺陷计算。通过测量缺陷处底片黑度、缺陷附近焊缝处底片黑度、缺陷附近母材处底片黑度、缺陷附近焊缝高度,可以用公式计算焊缝内部体积缺陷高度,该公式能够应用于未焊透和条状夹渣的高度测定,并在压力容器定期检验时对未焊透和条状夹渣缺陷安全状况进行定级。

Simple Detection of the Height of Volume Defects in Pressure Vessels Periodical Inspection

Using exposure curve and film characteristic curve, the height formula for internal volume defects in weld was deduced . The formula adapted to the calculation of volume defects in welds with smooth surface. By measuring the film blackness of the defect film blackness of the weld near the defect, film blackness of the base near the defect, and the weld height near the defect , the internal volume defect height can been calculated by the formula. The formula can been applied to determinate the height of lack -penetration and strip-slag, and to grade the defect security conditions for lack -penetration and strip-slag in pressure vessels periodical inspection.