Spectacle blind flange and blind flange

Dimensions and Specifications

KAYSEN offers standard dimensions for its Spectacle Flanges and Blinds,  Please note, however, that KAYSEN's fabricated products are made to each customer's unique specifications. Therefore, dimensions, materials, images, and all other product details referenced in the literature and on this website are general in nature. For exact product specifications, consult the KAYSEN factory and request certified engineering documents.

The application of spectacle flange

Spectacle Blinds are generally applied to permanently separating pipesystems, or just to connect with each other. A Spectacle Blind is a steel plate cut into two discs of a certain thickness.

KAYSEN's Spectacle Flanges, Single Blinds, and Ring Spacers are crucial pipeline accessories when a section of the pipeline may need to be isolated from the rest.

Single Blinds or Blanks are positive shut-off devices that prevent flow through a pipeline. Ring spacers or Open Blinds are used to fill the space of Single Blinds when they are removed from the piping system. With space, weight, and other pipeline requirements permitting, it may be more convenient and cost-effective in specific situations to use a Spectacle Flange, which is a combination of the two that can be rotated to function as Single Blind or a Ring Spacer.

The type of the blind flange:

Spectacle Blind Flange

A spectacle blind flange (also known as a figure-8 blind flage) is generally a piece of metal that is cut to fit between two pipe flanges and usually sandwiched between two gaskets. A spectacle blind flange is often made from two metal discs that are attached to each other by a small section of steel.

Single blind

A positive shut-off device normally installed adjacent to, or in conjunction with, a valve. Their purpose is to prevent accidental flow through a pipeline to a vessel. With the exception of cast iron, plastic, or fiberglass services, they are not drilled with bolt holes, but fit inside the bolt circle of mating flanges. Pipeline blinds or blanks are not the same as bolting blind flanges. Single blinds use standard gaskets.

Ring spacer

Ring spacers are bored to the matching pipe ID and are the same thickness as the "single blind" that it replaces. When removing a "single blind", either the flange and associated piping must be pulled together to seal the line, or a "ring spacer" must be installed to fill the gap. Thick single blinds or rigid piping systems normally require ring spacers.

Material

Stainless steel flange,Carbon steel flange, Alloy steel flange，etc.

SPECTACLE BLIND INOPEN POSITION

SPECTACLE BLIND INCLOSED POSITION