Figure 8 Spectacle Blind Dimensions

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.

Figure 8 spectacle blind dimensions.

Carbon steel units are available from stock. Class 150 spectacle blind line blank. Spectacle blind line blanks. Paddle spacer type 2.

Technical drawing for the figure 8 blank spectacle blind flange in accordance with asme b16 48 with raised face. 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. Dimensions of class 150 rf figure 8 blanks or spectacle blinds as per asme b16 48. Spectacle blind type 4.

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 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. The largest inventory of spectacle blinds figure 8 blind blank eye glass blind blank in any size rating or alloy what is a spectacle blind. For class 150 300 the height of rf shall be 2 mm.

Spectacle blind type 3. 304 and 316 stainless steel units are also readily available. 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. 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.

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. The rf dimensions shall be furnished in accordance with asme b16 5. Dimensions from spectacle blinds spades and ring spacers you will find in the main menu flanges asme b16 48 covers pressure temperature ratings materials dimensions dimensional tolerances marking and testing for operating line blanks in sizes nps 1 2 nps 24 for installation between asme b16 5 flanges in the 150 300 600 900 1500. Spectacle blinds or line blanks are flat plates sandwiched between flanges for positive isolation of process fluid.

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

One is solid disc and the other is hollowed. The height of the raised face shall be in addition to the thickness t.