Complete guide on Blind flanges

A blind flange is a solid disc that is usually used as a stop or to seal off a pipeline. Like a standard flange, it has sealing rings cut into the mating surface and mounting holes around its circumference. It is placed between an open and a blind flange, and it prevents the flow of fluids through the pipe. Usually, this type of blockage is used when adding another line or valve to an existing pipeline.

In the industry, blind flanges and solid flanges are used to close off segments of pipe or nozzles on vessels. When a nozzle is blanked off utilizing a blind flange in a plant, it is most often done so for two reasons: either the client does not use all of the nozzles supplied with the tank, or because the nozzle needs to be pressure tested.

Blind flanges are used to seal holes in pipes and prevent liquids or gasses from escaping the system. The face thickness of a blind flange is equivalent to that of a standard flange, as is the face type. The bolting pattern of blind flanges also matches that of a standard flange. In addition, blind flanges can be used to seal a pressure vessel’s nozzle opening. Because it is fastened, a blind flange allows for easy access to the inside of a vessel or pipe, unlike welded tops.

Several styles of blind flanges are available, its most common forms are the flat face (FF) and the raised face (RF). Raised faces have two levels; flat faces have a completely level surface; flat faces have a completely level surface.
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Blind flanges are most commonly used in what applications?

Water systems, pipeline construction, chemical manufacturing, and government services use blind flanges frequently.

Blind flanges are extremely useful for repairing pipelines upstream; however, they also can be used during pipeline construction to enable pipeline extension. This is achieved by just attaching the blind flange to the end of the pipeline.

Blind flanges serve what purpose?

Unless the flow of a pipeline is shut off at an earlier valve, repairing and maintaining a pipeline would be difficult unless miles of pipeline were affected.

By using flanged pipe, construction of pipelines has become significantly more rapid, it has also simplified repairs and sectional replacements. Pipe sections can now be constructed anywhere in the world, transported to the construction site, and are fastened in place only once they arrive, allowing repairs to be completed in less than 30 minutes.
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