Figure 8 Blind Flange

A figure 8 blank also called a spectacle blind flange is a pressure retaining plate with one solid end and one open end connected with a web or tie bar.

Figure 8 blind flange.

The shape is similar to a pair of glasses or spectacles hence the name spectacle blind. Flowell spectacle figure 8 blinds thicknesses are in accordance with api 590 to assure that these units will withstand the temperature and pressure of an ansi rated flange. Other materials are available on request. 304 and 316 stainless steel units are also readily available.

A spectacle blind is often made from two metal discs that are attached to each other by a small section of steel. A spectacle blind also known as a figure 8 blind is generally a piece of metal that is cut to fit between two pipe flange and usually sandwiched between two gaskets. One end of the spectacle flange is solid while the other end has a hole in the center. Spectacle flanges also known as spectacle blind flanges are most commonly used on piping systems that need to be separated regularly or where the flow through the systems is regularly stopped.

One end of the spectacle flange is solid while the other end has a hole in the center. Spectacle blind flange also known as figure 8 flange which is combination of the two that can be rotated to function as single bind or a ring spacer. Carbon steel units are available from stock.