The difference between submerged arc welding and high frequency welding1. Submerged arc weldingSubmerged arc welding is a method in which the arc burns under the flux layer for welding. The welding arc burns between the welding wire and the weldment. The heat of the arc melts the base metal and flux

The quality of the steel pipe is not only related to its service life, but also related to its use efficiency. Then when we are buying steel pipes, we can roughly distinguish the quality of the steel pipes by the appearance of the steel pipes. If the surface of the steel pipes has numbness and is no