Blind Flange

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The blind is used to close ends of piping systems. It is a kind of round plate with no center hold but with all the proper bolt holes. This blind is available in various sizes and materials and is used to provide positive closer on the ends of pipes, valves or equipment nozzles. This helps in easy access to a line once it has been sealed.

The is sometimes custom made or machined to accept a nominal sized pipe to which reduction is being made. This reduction can be a threaded reduction or welded reduction.


Cabon steel: A105, A350 LF2
Stainless steel: A182 F304/F304L/F316/F316L/F321
: F11, F12
Packing: plywood case and plywood pallet

What is the use of a blind flange?

Blind flange is put at the end of pipe or at the junction that would possibly be a future expansion into that direction.
Blind pipe flanges are often used for high pressure applications.
Piping is easier to drill or weld at the construction stage. Once it was in use, drilling or welding will need prolong cleaning especially when the fluid transferred is combustible. For the mean of future extension, either the blind or valve would be used to seal the end.

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