50 high-frequency tube welding machine can prodce: 1.the square pipe range : :Φ20------Φ50mm 2. the rectangle pipe range : 16×16--------40×40mmraw material thickness: 1.0---------2.75mm dischargeing speed: 20-------50m/m (adjustable) max width of raw material: 250mm outside installation dimension of machine set:45m×2.8m×1.8m