This three roll apparatus is composed of lead, buttress and mandrel roll sets. The #1 welding station, the three-roll forming apparatus, and the pivot position are in immediate proximity to the machine operator. The lead mandrel and buttress rolls are heat-treated alloy steel rolls. Rolls are yoke mounted and permit mechanical positioning to the corresponding strip in-feed helix angle. The lead roll table is adjustable under power for up, down, and tilt positions, which permits the operator to pre-bend the strip and adjust for a centerline pipe exit to the discharge table. Wire and /flux to the #1 welding station is fed along the side of the mandrel. Mill and I.D. welder control devices are provided at the mandrel position. Primary mill operation is accomplished from the #1 welding station. Complete forming mandrels with tooling are provided. A pair of electrically driven control rolls are provided to permit diameter change and the registry of edges at the I.D. weld position. A digital read-out of roll positions is included.