Intro: 

Our blind flanges are available with raised or RTJ faces, and we stock high hubs for sale and conversion purposes.

These flanges are available in all of our stainless steel and chrome-moly grades, from ½” to 36” and beyond, class 150 to 2500. We also stock large diameter Series A B16.47 Blind flanges in A105N, and can supply Series B and AWWA C207 Blind flanges in A105N with longer lead times. We can also source many of your other specification requirements.

The blind flange is so named due to the lack of a bore: it is a solid flange. It is used to close off the ends of piping systems and pressure vessel openings. As such it can be used in an existing operation flow, or for future expansion requirements. It also permits easy access to the interior of a line or vessel once it has been sealed and must be reopened.

We gives you many customized options on blind flanges. These include NPT tapped holes and special threads to allow pressure test connections to be fitted. Blind flanges are generally used to blank off the ends of pipe. They are also used on similar valves and pressure vessel openings. Because they are often located at the ends of systems, these flanges often are among the highest stressed flange types. However, most of these stresses are bending types near the center, and since there is no standard inside diameter, these flanges are suitable for higher pressure temperature applications. We carries stainless steel and specialty alloy blind flanges. For carbon steel, visit our company at www.forgeflange.com. We also recommends trying what is known as a blind insert flange. This is a two-piece blind flange similar to a lap joint an stub-end that allows for the outer flange to rotate around the blind insert. Please contact us for details on this type of product.