Spectacle Blind Dimensions

Spectacle blinds are available in standard sizes up to 24 inches and in forged material grades like astm a105 high temperature carbon a350 low temperature carbon and various astm a182 grades alloy stainless steel duplex.

Spectacle blind dimensions. Line size isolation 150 300 600 900 1500 2500 thickness thk o d. One is solid disc and the other is hollowed. Spectacle blind spades and spacers are also known as figure 8 paddle blank slip blind and spacer. 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.

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. Click on the link to learn about the chemical and mechanical properties and the selection criteria of these common spectacle blind grades which are the same as. An 8 blind or a spectacle blind is a piping fitting that is used for providing positive isolation.

Usa ez purge blinds. A spectacle blind is basically made up of two metal discs attached to each other by a metal strip as shown in the figure. 1 permit required confined spaces 1910 146 blanking or blinding means the absolute closure of a pipe line or duct by the fastening of a solid plate such as a spectacle blind or a skillet blind that completely covers the bore and that is capable of withstanding the maximum pressure of the. 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.

These are three different components that used in piping for positive isolation of the section of a line or equipment during maintenance and shutdown. There are three places in 29 cfr where line blinds are specifically noted as a safety device. Buy at reasonable prices in india. Wt thickness of the web or tie bar should be 6 mm minimum or equal to thickness t if less than 6 mm.

Iso 9001 2015 iso 14001 2015 ohsas 18000 2007 ped certified. In practice these dimensions have been rounded round off upwards. Asme b16 48 standard that covers line blanks. Paddle blind dimensions with hydrotest thickness chart paddle blind dimensions.

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. Paddle spacer type 2. Spectacle blind type 3. A spectacle blind is used in piping for positive isolation of the section of a line or equipment during maintenance and shutdown.

Usa ez vent blinds. 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.