Submerged arc welding is a high productivity method for welding steel prefabrication, steel products and large metal parts. The welding flux has been widely used in the field of making (welding) the Spiral Submerged Arc Welded Steel Pipe, Shipbuilding, LPG/ LNG Tank/Cylinder, Steel Prefabrication, Heavy Machinery Parts, Steel Boiler, Oil Pipeline, Stainless Steel Parts, Hardfacing and Surfacing Processing like Wear Resistant Plate and Arcoplate and other industry metal processing.