Automatic vertical position welding procedure of large storage tank with the upside-down construction technology

As the development of the upsidedown construction technology of large storage,the automatic welding in vertical position of tank shells turns into reality through adjusting welders' structure,changing the sequence of tank shells installation,improving the welding conditions and developing related electrogas welding procedure.The automatic vertical position welding procedure of larger storage tank with the upside-down construction technology makes welding operation easier and safer and quality higher than that with erection tank by scaffold.