This is the heavy end of the Bug-O line. These are not machines a welder carries up a ladder — they are systems that get built into a job and run for the length of it.

Automatic girth welders are the headline. A field storage tank is welded one horizontal seam at a time, all the way around, for as many courses as the tank is tall. Done by hand it is weeks of work at a duty cycle nobody wants to calculate. An automatic girth welder rides the tank wall on its own frame, carries its own operator cabin and flux recovery, and lays sub-arc weld continuously. Bug-O quotes a 40% reduction in field tank welding time, and every fabricator we have shown these to has recognised the number.

Beyond the girth welders, this section covers the machines built for one job and built well: beam cutters that cut structural sections in place rather than moving them, circle welders for nozzles and couplings, a heavy duty sub-arc tractor with a 350 lb payload, an overlay system that covers eleven vertical feet of cladding, and a high capacity version of the Modular Drive System rated to carry 140 lbs vertically.

The common thread is scale. If the work will not fit on a positioner and cannot be turned, these are the machines that go to it.

Most of what sells here starts with a conversation about the job rather than the machine — tank diameter, shell plate height, wire, and whether it is a new build or a repair. Send us those four things and we can tell you quickly whether there is a machine that fits.