The zipper welder has been in the Bug-O repertoire for quite some time, but the company said it has recently seen a larger demand for it due to increased tank production worldwide. The zippwer welder is used for vertical seam welding for storage tanks and other applications where a vertical seam weld is needed. “The zipper welder premise is quite simple. By being able to hang our rail system over the top of the tank and use only minimal magnets, it makes fit up time fast and effective,” said Josh Chiprich, Bug-O Tank Fabrication Market Manager.