... tube making machine. die set,pipe roll set. Roller and mould, welded pipe roller, stainless steel pipe mould ... -shaped tube, polygonal tube, single and double groove pipe, tube frame, special-shaped mould, etc.3. Specification range for round pipe ... tool steel Cr12mov as raw materials, mouild steel Cr12mov material set high wear resistance, toughness, resistance to high pressure, high hardness ...