... Welded Pipe Machine High frequency welded pipe machine uses roll forming theory to coil long steel strip of a certain ... shearing and butt-welding → material accumulating → non-power leveling →mill-forming → high-frequency welding → removing burrs outside of weld seam → ... or 400 KWEquipment compositionUncoiler,cutter&butt welder,storing device,forming and sizing unit,flying saw,straightener,end milling ...