... ,300m, one set for each size, totally 14sets.2. Tube Mill: DN8-DN150 1). Welding pipe diameter: 8~150mm 2). Thickness: 0.20~1 ... ). Voltage rating: Motor 380V, argon welder 220V 2. Tube Mill: DN150~DN350 1). Max welding pipe outer diameter: 150-350mm 2). Thickness: 0.25 ... , and India, Indonesia, South Africa, Vietnam and so on. Stainless steel tube welding machine