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What Is a Spectacle Flange?

What Is a Spectacle Flange?

spectacle-blind-flange
A spectacle blind or flange is a pipe fitting that separates one section of a line from another, allowing the line to be open or closed. The flange is usually used for smaller pipes.

Structure
A spectacle blind consists of two metal discs connected by a steel plate, making it resemble a pair of glasses, according to the Steinmans, LLC website. One disc has an opening, while the other is solid.

Features
Welding is not required to attach the blind to the pipe. The blind is typically attached as a permanent fixture and is effective for controlling flow in smaller pipes subject to higher pressure and temperature.

Operation
The blind typically fits between two pipe flanges and the gaskets. Installing, removing, and switching the line from open to closed usually requires an open area, making the blind unsuitable for use in narrower spaces.

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