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Carbon Steel ASTM A105N Forged Steel Flanges BLIND FLANGE Manufacturer ASME B16.5

What is a BLIND FLANGE and what about its specification and advantages.

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What is a Blind Flange?

The blind flange is basically a flange that does not have a hub or a bored center. Blind flanges have the face thickness of a flange, a matching face type, and similar bolting pattern. Blind flanges can also be used to seal a nozzle opening on a pressure vessel.

Blind(BL)flanges is used for terminating or isolating piping systems,they are essentially boltable blank discs.When installed properly and combined with the correct gaskets,they can achieve an outstanding seal which is easy to remove when needed.

 

Specification of Blind Flange

Sealing Face RF,FF,FTJ
Size Range 1/2″-48″/DN15-DN1200
Pressure Rating Class150/300/600/900/1500/2500lb
America Standard ASME B 16.5/ASME B 16.47 SERIES a/b
Carbon Steel ASTM A150/A150N
Low Tem Carbon Steel ASTM A350 LF2/LF3
Pipeline Steel ASTM A694  F42/46/56/60/65
Alloy Steel ASTM A182 F11/F12/F5/F9/F91/F92
Stinless Steel ASTM A182 F304/304L/304H,316,316L,310S,317,347,904L

 

Advantages of Blind Flange

Because valves may be located extremely far, even miles from where the work needs to be done, a blind flange allows you to stop the flow of fluid much closer to the job site. Valves are also known to stick and are very expensive to replace depending on the type of valve being used.

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