Figure 8 Blind Flange Dimensions

Blind flange dimensions are covered in asme b16 5 which covers pipe flanges and flanged fittings for size nps to 24 for above nps 26 to 60 it should be as per asme b16 47.

Figure 8 blind flange dimensions.

Spectable flanges get their name because they look like a pair of reading glasses or spectacles. 1 2 to 60 dn 12mm to dn 1500mm. Wt thickness of the web or tie bar should be 6 mm minimum or equal to thickness t if less than 6 mm. Outer diameter of body.

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 flange is a specialty flange made of two metal discs attached in the middle by a small section of steel. Other materials are available on request.

Find your paddle blind dimensions for o d. Carbon steel units are available from stock. Dimensions of class 150 rf figure 8 blanks or spectacle blinds as per asme b16 48. 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.

And thickness based on flange rating and blind type. Spectacle blinds or line blanks are flat plates sandwiched between flanges for positive isolation of process fluid. During dimensional inspection of flange you should check for following. 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.

A spectacle blind is basically made up of two metal discs attached to each other by a metal strip as shown in the figure. Spectacle blind 2 flanges 3 gaskets 4 stud bolts. Drill down to both series a and series b blinds. In practice these dimensions have been rounded round off upwards.

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. Dimensions of spectacle blinds according to asme b16 48. One is solid disc and the other is hollowed. 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.