automatic pipe welding equipment SAW,TIG,MIG,MAG,etc for circular/ ... in circular seam welding fields, such as tube head welding, pipe-pipe welding and flange welding, etc. 2.Feature:1.High ... all of them can be adjusted independently.7.During multi-layer welding of thick plate welding seam,generally,set Backing welding ... angle of active head0-90°manual4.sample products automatic pipe welding equipment