Spec Blind Dimensions

Any thickness rating or alloy is available upon request.

Spec blind dimensions.

This standard covers the dimensions for spectacle blind spades and spacers with pressure class 150 300 600 900 1500 and 2500 as listed in asme b16 5. 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. Paddle blind dimensions thickness chart. Paddle spacer type 2.

Wt thickness of the web or tie bar should be 6 mm minimum or equal to thickness t if less than 6 mm. 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 type 4. Spectacle blind type 3.

An 8 blind or a spectacle blind is a piping fitting that is used for providing positive isolation. Asme b16 48 standard that covers line blanks. Class 150 spectacle blind line blank. Asme b16 48 covers the dimensions and specifications of these isolation devices.

Line sizes up to 96 are available. One is solid disc and the other is hollowed. 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. Flange spades and ring spacers as separate products are used when the rotation of a spectacle blind would be difficult due to space constraints.

Thickness based on asme rating and line size for isolation or hydrotest blinds. In practice these dimensions have been rounded round off upwards.