Spectacle flange introduction

A spectacle flange is a specialty flange made of two metal discs attached in the middle by a small section of steel.Spectable flanges get their name because they look like a pair of reading glasses, or spectacles.Spectacle flanges,also known as spectacle blind flanges,are most commonly used on piping systems that need to be separated regularly or where the flow through the systems is regularly stopped.One end of the spectacle flange is solid,while the other end has a hole in the center.The spectacle flange can be rotated to place either the solid or hollow end within the pipe system,thereby opening or closing the flow.

Spectacle flange

Spectacle flange

1 Spectacle blind flange /  handle 

2 flange

3 gasket

4 bolt

Advantages of spectacle flanges:

Spectacle flange

Spectacle flange

Spectacle flanges require no welding for installation.

Application of spectacle flange

The figure 8 spectacle blind flange is usually isolated from other facilities or devices in the piping system.Spectacle blind flange is located in the open position to allow fluid to pass through the pipe  When the figure 8 spectacle flange is in the position of the close, the pipe is closed and the fluid is blocked.

The maintenance of the piping system is one of the reasons the figure 8 spectacle blind flange is rotated to the closed position.There is a drill hole in the connection web of the figure 8 spectacle blind flange, loosen and dismantle some bolts.The figure 8 spectacle blind flange can be rotated between flanges.After replacing the gasket,the bolts can be reassembled and tightened  

Spectacle flange used in piping system

Spectacle flange used in piping system


Spectacle flange manufactured in Haihao Group

Spectacle flange manufactured in Haihao Group


Spectacle flange used in piping system

Spectacle flange used in piping system

HH group have much experience production the spectacle flange,any special and normal size we can doing.Any need please contact us.

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