Referred to as flange, only a general term that usually refers to

a similar disk-shaped metal body surrounding the opening couple of fixing holes for connection with other things. It mechanical application is very wide, it looks very strange, like being called a flange, and its name comes from the English flange.metric hydraulic fittings
The flange of the disc-shaped member, the most common pipeline project, the flanges are used in pairs. In the pipeline project, the flange is mainly used for pipe connections. Need to connect pipes, a variety of installation flange, low-pressure pipe can be used Sifa Lan, the use of more than 4 kg pressure welding flange. Between the flange gasket signature rent, and then bolted.
The different pressures flange have different thickness and type of bolt.
Pumps and valves and pipe connections, these portions of the device, and also the shape of the corresponding flange, also known as a flange connection.
Any two planes in the vicinity of the bolt connection closed for a connecting part, is generally referred to as "flange", such as ventilation ducts connected to a member of this type may be referred to as "the flange portion.hydraulic banjo fittings