本文提要从焊缝热影响区的分析,提出了管件对接接头中双壁双投影及双壁单投影射线透照对底片形像尺寸的要求,进而探讨常见锅炉、压力容器中管件对接焊缝射线透照的合理角度,以保证射线透照的质量。问题的提出锅炉出压力容器制造中,僻件对接接头射线探伤是大量、经常的工作。如何正确选择射线透照的角度,以保证管件透照影像的完整与准 In this paper, the requirements of double-wall double-projection and double-wall single-projection radiographic transillumination on the size of the negative image are put forward from the analysis of the heat affected zone of the weld, and then the weld of butt welds in the common boilers and pressure vessels Transillumination of a reasonable point of view, to ensure the quality of radiation through the picture. PROBLEM PROBLEMS In the manufacture of pressure vessels for the production of boilers, the radiographic flaw detection of the butt joint is a large and frequent job. How to correctly choose the perspective of radiographic translucency, in order to ensure complete and accurate translucent images of the tube