Tube roll set for tube making machine. die set,pipe roll set. Roller and mould, welded pipe ... with only 0.05mm tolerance. 3. With CNC machine. 1. Description: Roller and mould, welded pipe ... , oval tube, fan-shaped tube, polygonal tube, single and double groove pipe, tube frame, special-shaped ... as raw materials, mouild steel Cr12mov material set high wear resistance, toughness, resistance to high ...