The invention discloses a double-film radiographic inspection method for a Ni steel butt weld, and belongs to the technical field of film radiographic inspection. A double-film radiographic inspection method for a Ni steel butt weld comprises the following steps that two Agfa C7 films are placed in a hidden bag, the front screen and the rear screen are 0.1 mm respectively, a middle screen is arranged in the mode that a 0.2 mm lead foil intensifying screen is pasted on the two faces, one ends of base metal on each negative film and the two ends of the weld need to be each provided with a transparency meter, and the two ends of the weld are each provided with a transparent film; meanwhile, a group of infrared induction marks are respectively arranged at two ends of the welding seam, and the marks are adsorbed on the surface of the tank body through gum. In order to solve the problems that three kinds of materials with different ray absorption simultaneously appear on one negative film according to the condition, and blackness of each part of the negative film cannot meet the film evaluation requirement according to a common single-film transillumination mode, a method of double films, three intensifying screens and one exposure is adopted, so that the film shooting efficiency is doubled, the construction progress is ensured, and the cost is saved.
本发明公开了一种Ni钢对接焊缝的双胶片射线检测方法,属于胶片射线检测技术领域。一种Ni钢对接焊缝的双胶片射线检测方法,包括如下步骤,选用一只暗袋放置两张Agfa C7胶片,前后屏各为0.1mm,中屏为一张双面贴有0.2mm铅箔增感屏的布置,每张底片上在其母材的一端以及焊缝的两端须各放置一个透度计,同时在焊缝的两端分别安装一组红外感应标记,标记通过背胶吸附在罐体的表面。为解决照此条件一张底片上同时出现三种射线吸收不同的材料,按普通的单片透照方式无法使底片各部位的黑度满足评片的需要的问题,采用双胶片,三增感屏,一次曝光的方法,使得拍片效率提高了一倍,保证了施工进度,又节省了成本。
Double-film radiographic inspection method for Ni steel butt weld
一种Ni钢对接焊缝的双胶片射线检测方法
2023-07-04
Patent
Electronic Resource
Chinese
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