Figure 8 Spectacle Blind Dimensions

A spectacle blind is basically made up of two metal discs attached to each other by a metal strip as shown in the figure.

Figure 8 spectacle blind dimensions.

Spectacle blind spades and spacers are also known as figure 8 paddle blank slip blind and spacer. 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. For class 600 900 1500 2500 the height of rf shall be 7 mm. Wt thickness of the web or tie bar should be 6 mm minimum or equal to thickness t if less than 6 mm.

Class 150 spectacle blind line blank. Dimensions of class 150 rf figure 8 blanks or spectacle blinds as per asme b16 48. Spectacle blinds should be made from a plate or forging specification approved for use by asme b31 3 of essentially the same chemical composition as the mating flanges. Other materials are available on request.

For class 150 300 the height of rf shall be 2 mm. The rf dimensions shall be furnished in accordance with asme b16 5. Paddle spacer type 2. 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.

One is solid disc and the other is hollowed. Spectacle blind type 3. An 8 blind or a spectacle blind is a piping fitting that is used for providing positive isolation. Paddle blank type 1 click any image above to enlarge it and lock it in place then scroll to the bottom table for dimensions spectacle blind flange classes choose your pressure class below.

A spectacle blind is generally a piece of metal typically carbon steel or stainless steel that is machined to fit between two pipe flanges and usually set in between two gaskets. These are three different components that used in piping for positive isolation of the section of a line or equipment during maintenance and shutdown. Carbon steel units are available from stock. The height of the raised face shall be in addition to the thickness t.

This kind of flange is generally a piece of metal than is cut to fit between two pipe flanges and usually sandwiched between two gaskets a spectacle blind is often made from two metal discs that. Spectacle blind line blanks. Spectacle blinds or line blanks are flat plates sandwiched between flanges for positive isolation of process fluid. 304 and 316 stainless steel units are also readily available.

Spectacle blind type 4. Technical drawing for the figure 8 blank spectacle blind flange in accordance with asme b16 48 with raised face.