Profile: National Metal Industries supplies stainless steel sheets, plates, coils, tubes, pipes, rods, wires, flats, fittings and flanges. Seamless/ERW stainless steel pipes are used for conveyance of fluids intended for critical high temperature. Seamless SS tubes are used in heat transfer process equipment like boilers, super heaters, heat exchangers, and condensers. Our sheets are used in chemical, fats & fertilizer, cement & ship builder industries. Our flanges include S.S. & C.S. flanges & backing / lap joint flanges. Our pipe flanges come in a wide selection of dimensions and specification.