摘要
结合5万m3LNG低温储罐的建造,对9%Ni钢的埋弧自动横焊和手工焊条电弧焊进行了大量的工艺试验,试验表明,采用ERNiCrMo-4焊丝、相应的焊剂和合适的焊接规范能得到性能合格的焊接接头,并能实现自动焊接。介绍了大型LNG储罐9%Ni钢底板和壁板安装制造的焊接工艺及焊接顺序,控制了内罐的焊接变形;并介绍了9%Ni钢焊接质量检验的过程和射线检验采取的有效措施,保证了5万m3LNG储罐的施工质量,为LNG储罐施工的焊接检验积累了经验,对LNG储罐的建造具有重要的实用价值。
A large number of process tests have been carried out to study 9% Ni steel automatic welding of horizontal seams and manual metal arc welding for 50000 m3 storage tank construction. The results show that qualified welded joints can be made using ERNiCrMo -4 welding wire, corresponding welding flux and appropriate welding codes, which can realize automatic welding, reduce labour intensity and improve productivity. The paper introduces welding process and welding sequence of 9% Ni steel bottom plates and wall plates in the construction of large LNG storage tank, which can control the welding deformation of the tank. Quality inspection and ray examination for 9% Ni steel welding are presented to insure the construction quality, which help accumulate the experiences in welding inspection and have important practical value for the construction of LNG storage tank.
出处
《压力容器》
北大核心
2010年第2期33-37,49,共6页
Pressure Vessel Technology
基金
上海市科委资助项目(043012012)
关键词
LNG储罐
9%NI钢
焊接工艺
质量控制
LNG （ liquefied natural gas） storage tank
9 % Ni steel
welding process
quality control
