Spec Blind Dimensions

Asme b16 48 standard that covers line blanks.

Spec blind dimensions. Includes both mss sp44 series a and api 605 series b ratings. In practice these dimensions have been rounded round off upwards. Paddle blind dimensions thickness chart. 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.

Any thickness rating or alloy is available upon request. Flange spades and ring spacers as separate products are used when the rotation of a spectacle blind would be difficult due to space constraints. Spectacle blind line blanks. Spectacle blind type 4.

Thickness based on asme rating and line size for isolation or hydrotest blinds. One is solid disc and the other is hollowed. A spectacle blind combines in one single product a flange spade and a ring 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.

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. 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. Line sizes up to 96 are available.

Paddle spacer type 2. Spectacle blind type 3.