Dimensions of class 150 rf figure 8 blanks or spectacle blinds as per asme b16 48.
Figure 8 spectacle blind dimensions.
An 8 blind or a spectacle blind is a piping fitting that is used for providing positive isolation.
Wt thickness of the web or tie bar should be 6 mm minimum or equal to thickness t if less than 6 mm.
304 and 316 stainless steel units are also readily available.
The height of the raised face shall be in addition to the thickness t.
One is solid disc and the other is hollowed.
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.
Technical drawing for the figure 8 blank spectacle blind flange in accordance with asme b16 48 with raised face.
Spectacle blinds or line blanks are flat plates sandwiched between flanges for positive isolation of process fluid.
Spectacle blind line blanks.
In practice these dimensions have been rounded round off upwards.
For class 600 900 1500 2500 the height of rf shall be 7 mm.
Spectacle blind type 3.
The rf dimensions shall be furnished in accordance with asme b16 5.
Paddle spacer type 2.
Spectacle blind spades and spacers are also known as figure 8 paddle blank slip blind and spacer.
A spectacle blind is basically made up of two metal discs attached to each other by a metal strip as shown in the figure.
Class 150 spectacle blind line blank.
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.
Other materials are available on request.
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.
Spectacle blind type 4.
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.
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 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.
