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射线探伤是球罐的常用探伤方法中需人力、物力最多,占用工时最长的一种方法,其透照底片要作为球罐焊缝内在质量的重要凭证而长期保存。本文简介了北京5千 m~3天然气球罐的工程概况和射线探伤的特点,并就如何组织球罐施工现场的射线探伤作了全面介绍,其中包括:采用的探伤器材、球罐焊缝的划线、定位和编号、选取的曝光参数、摄片顺序、作业台班与人员的配置、透照前的准备、透照时机头的固定与移动、标记的摆放、射线防护、暗室处理、底片评定以及返修部位的划定。最后作者就如何组织好大型球罐的射线探伤谈了若干看法。
Radiographic testing is a commonly used method of testing spherical tank manpower and material resources, the longest occupation of a method, the transillumination film to be as an important evidence of the inherent quality of the spherical tank weld and long-term preservation. This article introduces the project overview of Beijing 5 000 m ~ 3 natural gas balloon cans and the features of the radiofrequency detection. It also provides a comprehensive introduction to how to organize the radiographic flaw detection on the construction site of the spherical tank, including the testing equipment, Scribing, positioning and numbering, selected exposure parameters, sequence of radiographs, assignment of workstations and personnel, preparation before transillumination, fixation and movement of radiographing heads, marking, radiation protection, darkroom processing, Film evaluation and rework site delineation. Finally, the author talked about how to organize the radiation detection of a large spherical tank.