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Learn About 9 Types of Pipes Flanges

In this blog, we’ll go over the usage and benefits of nine different types of flanges, including:

1. Threaded flange
2. Socket-weld flange
3. Slip-on flange
4. Lap joint flange
5. Weld neck flange
6. Blind Flange
7. Reducing flange
8. Expander flange
9. Flangeolet or weldoflange

The type of connection, flange face type, type of material, and pressure and temperature rating are the four primary criteria used to judge and classify flanges.

1. Threaded Flanges:
Screwed flanges are another frequent name for threaded flanges. Although it is a basic joint or connection, it is incapable of withstanding high-pressure flow.
Threaded flanges are only available in a few diameters below 4″ in diameter.
Threaded flanges are inexpensive.
Threaded flanges are commonly utilized in the utility industry.
They are divided into two types: FF and RF.

2. Socket Weld Flange:
Female sockets are socket weld flanges that have been welded together. These sockets are used to hold the pipes. Fillets are welded around the outside of the pipe. It is recommended for use in low-pressure applications because it cannot resist excessively high pressure.
These socket weld flanges are available in both FF and RF configurations.
It has a moderate price tag and is easy to make.

3. Slip-on Flange:
To provide a secure and flawless fit, slip-on flanges have a hole that matches the OD (outside diameter) of the pipe. It’s welded from the inside out. Slip-on flanges aren’t recommended for high-pressure or high-temperature applications. These flanges should only be used in low-pressure settings.

4. Lap joint flange:
A stub end and a loose flange are usually the two major components of lap joint flanges. The stub ends are butt-welded to the pipes, and the backing flange is added to allow the pipe to slide freely over it.
For cost-effectiveness, this flange is commonly composed of carbon steel.
It allows for a more secure connection with a lower risk of leaks.
Flexible lap flanges can be spun over the pipe.

5. Weld Neck Flange:
Fabricating a weld neck flange requires a great deal of skill and precision.
It has a lengthy hub, which necessitates more room for accommodation.
These flanges come in a variety of sizes, including FF, RF, and RTJ.
With welded pipes, weld neck flanges are commonly employed.

6. Blind Flange:
A Blind Flange is a simple disc with a hole drilled in it. It’s usually used in tandem with another flange. Its primary function is to isolate or terminate a piping system. They’re used to cover manholes.

7. Reducing Flange:
This flange allows for piping size modifications.
It does away with the necessity for a reducer.
It has a smaller bore and a fixed diameter.
Because they cause pressure loss, reducing flanges is rarely utilized in pipelines.

8. Expander Flanges:
Except for the increased piping size, these flanges are quite similar to weld neck flanges.
Reducer and weld neck flanges are commonly replaced or replaced by expander flanges.
Its primary function is to connect valves, pumps, and compressors.

9. Weldoflange or Flangeolet:
The two-weld joint connection is reduced with these flanges.
They’ve got a long neck and a long hub.
It has a 90-degree branch that serves as a high-pressure pipe connector.




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