Pipe welding tool

A pipe welding tool for use within pipes, the pipes having inside walls, comprising:

• a center tube, the tube comprising a side wall, a top wall, and a bottom wall;
• two or more wall engaging assemblies, each of the two or more assemblies attached to the tube and extending outward therefrom, each assembly having an arm, a roller assembly attached to the arm, said roller assembly having a row of vertically aligned wheels, and a biasing mechanism cooperating with the arms for biasing the roller assembly against the pipe walls;
• a hose, the hose extending from the tube top wall to the tube bottom wall, said hose connected to a quick connect coupling adjacent to the bottom wall, wherein the coupling is connected to an independent gas source for providing flux gas to the tool;
• and
• a gas delivery head, the gas delivery head situated on the top wall of the tube, said head comprising a nozzle and a gas lens, the nozzle being in communication with the hose and receiving gas therefrom, said nozzle directing gas flow into the gas lens, wherein the gas lens has a central aperture that is mateable with the nozzle, the gas lens further comprising a side wall encircling said lens, wherein a plurality of holes are positioned therearound such that when the gas is emitted from the hose into the nozzle, said gas is released through the gas lens to the surrounding area in a 360 degree planar pattern.