大型储罐倒装法施工立缝气电立焊工艺

Study of electro-gas vertical position welding technology in up-side-down construction of heavy storage tank

新疆油建在50000m3外浮顶储罐倒装法施工和100000m3外浮顶储罐倒装法施工时,由于国内通用的背面加水冷铜衬垫的立焊气电立焊焊接工艺和焊机不适用,开发了CO2半自动焊打底,气电立焊焊接一次成形的焊接工艺。通过现场运用,CO2气体保护焊打底和气电立焊组合的焊接工艺操作简单,工效高,成形好,焊接合格率在98%以上,填补了一项大型储罐倒装法施工立缝自动焊接工艺的空白。

Due to domestic welder and electrogas vertical position welding technology with back water cool copper liner aren＇t applicable, CO2 semi-automatic backing weld and once formed electrogas vertical position welding technology in the construction of 50 000 m^3 and 100 000 m^3 tanks with outer floating top inverted installation method.In deverloped in this paper,through the use on site, the operation of technology combined CO2 gas shield backing weld with electrogas vertical position welding is simple,efficient,good formed and welding qualified rate of 98%.This technology fills the gap of automatic vertical welding technology in the construction of large tank inverted installation.