Submerged arc welding of straight seam steel pipe has the following advantages:
Submerged arc welding heat concentrated, welding safety metal spatter loss, there is no waste of the electrode head, workpiece thickness h may also be without groove, thus saving metal material.
Submerged arc welding can be employed large welding current, arc heat concentration, deep penetration, the wire can be continuously fed unlike electrodes as frequently replaced, so the productivity of 5 to 10 times higher than that of manual arc welding village.
Submerged arc welding is not visible arc welding, welding fumes and rarely, but also mechanical automatic operation, and thus the working conditions have been greatly improved. Submerged arc welding is a limitation: since the arc is not visible, thus demanding joint processing and assembly, welding position subject to certain restrictions, are generally always in flat-position welding.
