As early as year 1996, after serving for the large-scale project of oil tank with capacity of 1 million CBM, we set out to develop the automatic tank welding machine (tank welders), which adapts to Chinese national condition. During more than 10 years of development,we cultivated the four series of automatic welding machines and auxiliary equipments applicable for the construction of various cylindrical vertical tanks, towers, vessels, blast furnaces, etc. We are capable to provide complete solutions for bothBottom-to-Top(Bottom up) and Top-to-Bottom(Top down) tank construction mode, and theproducts ranges from: CNC Plate Cutting Machine, Automatic Single Head Single Side Plate Milling Machine, Automatic Double Head Double Sided Plate Milling Machine, High Speed Milling and Molding Machine, Automatic Sub-arc Girth Welding Machine, Automatic Electro-gas Vertical upWelding Machine, Automatic Butt/corner Seam Welding Machine, Welding Seam Grinder, Hydraulic lifting device for top-to-bottom tank construction. ...... The efficiency of our Automatic Girth Seaming Welding Machine is 30 times as manual welding, and the efficiency of Automatic Electro-gas Vertical up Welding Machine is 50 times as manual welding, and only need to weld outside the tank, one passis ok, can fully pass the x-ray and mechanical test. Even use our hydraulic lifting system for Top-to-Bottom tank construction, we still can realize the automatic welding of inside girth seam, so as to maximize the construction efficiency. Our automatic tank welding machines has CE certificate, and have been widely applied into such fields as the key construction projects both home and abroad, with success and recognition from multi industries and cooperative partners.