Double-sided Submerged Arc Welding Straight Seam Steel Pipe Technology
LSAW-Longitudinal Submerged Arc Welded is a new welding method invented in 1940. It is the same as the previous manual welding. It is still protected by slag, but this slag is not the coating of the electrode. The double-sided LSAW steel pipe and the manual welding are the same in that it is still protected … Read more