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针对焊接高压三通角焊缝内在质量检测难度大等缺点，简要介绍了三通角焊缝射线检测时的透照方法、角度的确定和最少在照次数的讨论．
In view of the defects such as the difficulty of testing the internal quality of welded high-pressure three-way fillet welds, this paper briefly introduces the method of transillumination when testing the radii of the three-way fillet welds, as well as the determination of the angle and the discussion of the least number of radiographs.