This line can produce round steel pipe, square pipe ... customers all over the world BN114 high frequency tube welding unitit is mainly composed by uncoiler, straightener, leveler, ... shear and end welder, horizontal accumulator, forming, welding and sizing mill, computer cutting saw, runout table.main ... thickness of welded pipe: 2~5 mmspeed of tube welding: 15~50 m/minpower of major motor: 250 ...