Spectacle Blind Flanges Dimensions

Spectacle blinds female rtj design as per asme b16 48 are used for sandwiching between rtj flanges and requires two pairs of ring joint gaskets unlike the male rtj spectacle blinds where the gasket is an integral part of the spectacle blind.

Spectacle blind flanges dimensions.

Blind flange dimensions are covered in asme b16 5 which covers pipe flanges and flanged fittings for size nps to 24 for above nps 26 to 60 it should be as per asme b16 47. We typically machine our spectacle blinds using a single piece of metal but for larger size blinds we often craft these from two metal discs that are attached to. Flanges table flanges dimensions flanges standard chart flanges size chart india. Class 150 spectacle blind line blank.

In practice these dimensions have been rounded round off upwards. During dimensional inspection of flange you should check for following. Flanges table flanges dimensions flanges standard chart flanges size chart we export. A spectacle blind is used in piping for positive isolation of the section of a line or equipment during maintenance and shutdown.

Table below provides links to dimensions of female rtj spectacle blinds as per asme b16 48 for. A spectacle blind is basically made up of two metal discs attached to each other by a metal strip as shown in the figure. Outer diameter of body. An 8 blind or a spectacle blind is a piping fitting that is used for providing positive isolation.

One is solid disc and the other is hollowed. Class 300 spectacle blind line blank. A spectacle blind combines a flange spade and a ring spacer in a single device this is the reason why flange spades are called single blinds or blanks. Uae saudi arabia qatar oman malaysia sinagapore indonesia sudan israel south africa kenya metal industries is a professional steel flanges and forgings manufacturer in india specialize in manufacturing.

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. Wt thickness of the web or tie bar should be 6 mm minimum or equal to thickness t if less than 6 mm. Asme b16 48 standard that covers line blanks. 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.

The difference is that spectacle blinds may need some space to be rotated and this space is not always available due to the routing of the piping system. Stainless steel spectacle blind flanges. Ansi b16 5 spectacle blind flange material specification.