Submerged arc welding used in enameled reactors

There are four common enamel welding methods, today let us focus on understanding the principle of submerged arc welding. As well as compared to other welding methods, what are its advantages and disadvantages.

Submerged arc welding of enamel reactor equipment welding is a mechanized arc welding method in which the arc burns under the flux layer for welding. This enamel equipment welding method is the use of welding wire and weldments between the flux layer under the burning arc to generate heat, melting wire, flux and the parent metal and the formation of welds. Compared with other welding methods have the following advantages: ① the thickness of the base material is not limited; ② the melting depth is large, high deposition efficiency, high welding speed, high welding productivity, especially suitable for welding of medium-thick plate. ③ welding quality is stable, less affected by human factors; ④ welding process without spatter, no arc light; ⑤ better labor conditions for welders; ⑥ easy to realize mechanization and automation.

Compared with other welding methods have the following shortcomings: ① welding equipment is more complex, more expensive; ② operation mobility is poor, generally only suitable for flat welding position welding; ③ the need for a certain amount of tooling equipment, especially the welding of the ring peak, there must be a corresponding welding operation frame and welding roller frame.

Due to the significant advantages of submerged arc welding, so in the thickness and large thickness of the weldments on the extremely wide range of applications. Selection of the appropriate wire and flux, can be welded all kinds of iron base metal. Therefore, submerged arc welding is the main seam of glass-lined equipment (longitudinal seam and ring seam of enameled reactor cylinder) preferred welding method, glass-lined reactor and other glass-lined equipment, about 90% of the welding workload is submerged arc welding to complete.