某空分冷箱铝镁合金压力管道的DR检测  

DR Detection of Aluminum-magnesium Alloy Pressure Pipe in one Air Separation Cold Box

作　　者：李婧琳 黄焕东 王杜 钱盛杰 沈正祥 Li Jinglin;Huang Huandong;Wang Du;Qian Shengjie;Shen Zhengxiang(Ningbo Special Equipment Inspection and Research Institute,Ningbo 315000)

机构地区：[1]宁波市特种设备检验研究院,宁波315000

出　　处：《中国特种设备安全》2023年第1期46-49,共4页China Special Equipment Safety

摘　　要：DR检测技术与常规射线检测技术相比具有成像速度快、操作便捷、成像分辨率高等优点。本文对某企业空分冷箱内的压力管道开展DR数字射线成像检测,取得了较好的成像效果。通过对焊接工艺和材料性质进行分析,给出了未焊透缺陷产生的可能原因,并提出了适当提高焊接线能量、降低焊接速度、适当增大焊接坡口间隙等焊接工艺改进的建议。Compared with conventional radiographic detection technology, DR detection technology has the advantages of fast imaging speed, convenient operation and high imaging resolution. This paper carried out DR digital radiography inspection on the pressure pipeline in the cold box of an air separation plant, and achieved good imaging results. Through the analysis of the welding process and material properties, the possible causes of the incomplete penetration defects are given, and suggestions for improving the welding process such as appropriately increasing the welding heat input, reducing the welding speed, and appropriately increasing the welding groove gap are proposed.

关 键 词：空分冷箱 压力管道 铝镁合金 数字射线(DR) 

分 类 号：X933.4[环境科学与工程—安全科学]