Dialing in a stainless line and want hardware you can trust from day one? YouÕre getting a 2 blind flange in 316 Stainless Steel built around a raised face sealing surface and 150# pattern. ItÕs built with a raised-face surface to help create a confident seal when paired with the right gasket. People usually ask what a blind flange actually doesÑthis one is simply the bolted connection point that lets you tie pipe into flanged equipment. 316 provides extra protection compared to 304 in many real-world conditions. Blind flanges are used to close off the end of a line, valve, or vessel nozzleÑgreat for isolating sections for service. At PLYET Industrial Supply, we stock connection hardware like this because downtime isnÕt an option.