Originally Posted by rmfnla
This is also called torch welding as opposed to using a "stinger" (arc welder) or any of the arc welding variations (TIG, MIG). Torch welding requires heating a larger area around the weld while the weld is being made; this is very destructive to thin-walled tubes. Torch welding is best for low-tech applications like automobile exhaust systems and re-bar.
I disagree, though shouldn't nit pick. Torch welding can work for thin-walled tubing, it just requires an artist's touch. Fillet Brazing, Lugging, and TIG welding are much easier to implement in a production environment.