automatic steel pipe seam welding machine SAW,TIG,MIG,MAG,etc for circular/longitudinal seam competitive price ISO9001,CE HUAFEI ... automatic steel pipe seam welding machine 1. Brief introductionAutomatic Circular seam welding machine is designed for circular seam welding of round work ... according to working requirements, and is widely applied in circular seam welding fields, such as tube head welding, ...