What is Flange ?

Referred to as flange , just a general term that usually refers to a similar disks of metal surrounding open on several fixing holes for connecting the other things. This thing is very widely used in machinery, so looks strange, as long as the flange like is called , and its name comes from the English flange.
So the flange is a disk-shaped parts, the most common in the pipeline project, the flanges are used in pairs. In the pipeline project, the flange is mainly used for the connection of the pipeline. The need to connect pipes, various mounting a flange , low-pressure pipe can use the wire connected to the flange , the use of more than 4 kg pressure welding flange. Plus seal between the two flanges, and then secured with bolts.
The different pressures flange have different thickness and the use of different bolts.
Pumps and valves, and pipe connections, facilities and equipment of the local, but also made corresponding to the flange shape, also called a flange connection.

All in two planes used in the surrounding bolted closed simultaneously connected parts, generally known as the " flange ", such as ventilation pipe connections, this type of parts can be called a flange parts.