Spectacle Blind Flanges

Spectacle Blind Flanges
Separating one part of a line from another requires a spectacle blind, able to switch from closed to open and back again. Bleed rings provide a means to release pressure from the pipe through a controlled opening.
Materials used:
Carbon Steel: ASTM A105, A350 LF1,LF2 CL1/CL2 LF3 CL1/CL2, ASTM A694 F42,F46,F48,F50,F52,F56,F60,F65,F70
Stainless Steel: ASTM A182 F304/304L, F316/316L, F316H,F316Ti,F321,F44(UNS S31254)
Alloy Steel: ASTM A182 F1,F5/a,F9,F11,F12,F22,F91
Duplex&Super Duplex Steel: ASTM A182 F51/UNS S31803,F53/UNS S32750 F55/UNS S3260
Special Alloy Steel: Monel400,Inconel 600, Inconel 625, Inconel 800, Inconel 825
Key Features:
Can be attached to the pipe without welding (sometimes an additional seal weld is used as well)
Ideal for higher pressure and temperature applications for small pipe sizes
Not recommended for larger loads, especially when subjected to higher torque
Uses of threaded flanges:
Threaded flanges can be fitted to pipes of various sizes without welding and this is one chief benefit for which these flanges are highly demanded.
They can be used in extremely high pressure applications, particularly at or near atmospheric temperature, where the necessary post weld heat treatment is not possible.
They are ideal for small diameter piping applications.
They are economical and time saving devices.
These threaded flanges are normally designed for non-cyclic applications.
The flanges are suitable to be used in applications where welding is hazardous.
They can be used in highly explosive areas.
Types of Flanges
Blind Flange Lap joint flange Orifice flange Reducing flange Slip-on flange Threaded flange Weldneck flange Large-size flange Socket-weld flange Spectacle-blind flange Pipe flange blots Pipe flange gaskets
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