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Types of flanges

 What is Flange? What are the Types of Flanges Used in Piping System ?

Flanges are essential components in piping systems, used to connect pipes, valves, pumps, and other equipment. They allow for easy assembly and disassembly, inspection, and maintenance. Here are the common types of flanges used:


1. Weld Neck Flange

- Application: High-pressure, high-temperature environments.

- Features: Long tapered hub, welded to the pipe.

 

2. Slip-On Flange

- Application: Low-pressure applications.

- Features: Slides over the pipe, welded on both the inside and outside.


3. Socket Weld Flange

- Application: Small-diameter, high-pressure pipes.

- Features: Socket inside the flange, pipe inserted and welded.


 4. Blind Flange

- Application: Closing the end of a piping system.

- Features: No bore, used to block off a pipeline or valve.


5. Threaded Flange

- Application: Low-pressure, low-temperature systems.

- Features: Internal threads, screwed onto the pipe.

6

. Lap Joint Flange

- Application: Pipes with frequent disassembly.

- Features: Two-piece assembly (flange and stub end), used with a stub end.


7. Reducing Flange

- Application: Connecting pipes of different sizes.

- Features: Bore designed to fit pipes of varying sizes.


8. Long Weld Neck Flange

- Application: High-pressure, high-temperature systems.

- Features: Extended neck, often used in equipment connections.


9. Orifice Flange

- Application: Measuring flow rates.

- Features: Used with orifice meters, has pressure taps for flow measurement.


10. Expander Flange

- Application: Increasing pipe size.

- Features: Combines a flange and a reducer.


11. Ring Type Joint (RTJ) Flange

- Application: High-pressure, high-temperature applications.

- Features: Metal ring inserted into the flange groove for sealing.


Each type of flange is selected based on factors like pressure and temperature requirements, pipe material, and installation and maintenance needs.

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