Profile: USA Industries is a source for tube plugs, heat exchangers, and boiler tools. Our inventory consists of blind flanges, isolation, and hydro test paddle blinds. We provide blind flanges for both purchase and rental meeting SA105 (Carbon Steel) specifications. Our products are used to build, repair, replace, test, clean or plug heat exchanger, condenser, boilers and fin-fan assemblies. With state of the art CNC machinery, we can manufacture parts to specific design and material specification.