This machine line has passed ISO9001:2000 Quality Managing-system Certification. It consists of uncoiler, shear and end welder, accumulator, forming, welding, sizing unit, pneumatic tracking or computer-controlled length cutting saw and runout table Main Technical Parameters   ZG12 unit ZG16 unit ZG25 unit ZG28 unit Diameter of Welded Tubes φ7-16mm φ8-25mm φ8-30mm Φ10-38mm Wall Thickness of Welded Tube 0.2-0.5mm 0.3-1.0mm 0.4-1.2mm 0.6-1.5mm Speed of Tube Welding 30-100M/min 30-90M/min 30-90M/min 30-80M/min Power of Major motor 15KW 22KW 30KW 45KW High Frequency Power 60KW 60KW 100KW 100KW