Spectacle Blind Dimensions
In practice these dimensions have been rounded round off upwards.
Spectacle blind dimensions. 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. The specification that determines the dimensions of a spectacle blinds is asme b16 48 line blanks. One is solid disc and the other is hollowed.
Wt thickness of the web or tie bar should be 6 mm minimum or equal to thickness t if less than 6 mm. 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. These are three different components that used in piping for positive isolation of the section of a line or equipment during maintenance and shutdown.
Spectacle blind dimensions a spectacle blind is generally a piece of metal that is cut to fit between two pipe flanges and usually sandwiched between two gaskets. L mm b min mm d 2 mm d 4 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 and piping involved.
An 8 blind or a spectacle blind is a piping fitting that is used for providing positive isolation. Ptfe virgin or conductive other pressure levels. 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.
Asme b16 48 standard that covers line blanks. A line blank conforming to this standard will be marked in the following way. 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 often made from two metal discs that are attached to each other by a small section of steel. A spectacle blind is used in piping for positive isolation of the section of a line or equipment during maintenance and shutdown. With spectacle blinds it is possible to separate pipe sections.
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.
