Automatic Slip-on flange for the welding of the internal and external incidence angle. Features The automatic slip-on flange welding machine offers excellent welding capacity (250-350 inch/day). The machine is easy to operate. The automatic slip-on flange welding machine offers excellent surface forming. It offers a welding compliance rate (without re-working for the skilled operator). The automatic slip-on flange welding offers good driving reliability.