Weld-On Circular Sight Glass

Weld-on circular sight glass for a quick observation inside pressure vessels, silos, pipelines, oil tanks, mixers separators. This sightglass fitting comes standard with all seals and mounting hardware included. The kit includes one Weld pad made from 316L stainless steel, one Cover flange, one toughened borosilicate disc, one seal gasket, one cushion gasket made from Klinger(R) C-4400, eight mounting studs and nuts. The Weld pad is flat on the bottom and has a weld prep chamfer ready to be welded to a flat process wall. Curvature can be machined in as needed to match non-flat vessel walls. The weld pad made from 316L has better overall corrosion resistance than 321 or RST 37.2, which have greater strength. The combination of 316L for the weld pad and 321stainless steel or 37.2 carbon steel for the clamp flange gives this kit the most optimum balance of strength and corrosion resistance.

Weld-on circular sightglass for a quick observation inside pressure vessels, silos, pipelines, oil tanks, mixers separators. This sightglass fitting comes standard with all seals and mounting hardware included. The kit includes one Weld pad, one Cover flange, one toughened borosilicate disc, one seal gasket, one cushion gasket made from Klinger(R) C-4400, eight mounting studs. The Weld pad is flat on the bottom and has a weld prep chamfer ready to be welded to a flat process wall. Curvature can be machined in as needed to match non-flat vessel walls. This kit is suitable for clean room applications, semiconductor, pharmaceutical or food processing applications with requirements for sanitary use. After welding the ferrule (weld pad) the sightglass disc has a permanent dedicated location on the pressure vessel. Cover flange, window, seals and mounting hardware can be replaced during scheduled service intervals or as needed. Sightglass disc and the gaskets must be replaced whenever the assembly is taken apart.