The function of the flange is to connect other things, such as parts, pipes, etc.

Flange, referred to as flange, is just a general term. 

It usually refers to a few fixed holes opened around a disk-like metal body for connecting other things. 

This thing is widely used in machinery, so it looks strange. As long as it looks like it, it is called a flange.

Flange is a part that connects shafts to each other. It is used for the connection between pipe ends. 

It is also used as a flange on the inlet and outlet of equipment. It is used for the connection between two devices, 

such as reducer flange. In pipeline engineering, flanges are mainly used for the connection of pipelines. 

Install a flange at the ends of two pipelines that need to be connected. 

Wire flanges can be used for low-pressure pipelines, and welding flanges can be used with pressures above 4 kg.

Those are basic introduction Fucntion of Flange.