Flange is also called flange plate. Flange is the part connecting the pipe to the pipe, which is connected to the pipe end; it is also useful for the flange on the equipment inlet and outlet, which is used for the connection between two equipment, such as the reducer flange. Flange connection or flange joint refers to the detachable connection with flange, gasket and bolt as a group of combined sealing structure. Pipeline flange refers to the flange used for piping in the pipeline device, and used for equipment refers to the inlet and outlet flange of the equipment. There are holes in the flange, and the bolts make the two flanges tightly connected.
The flange is sealed with gasket. Flange is divided into threaded connection (threaded connection) flange, welding flange and clamp flange. Flange is used in pairs, low-pressure pipeline can use screw flange, more than four kilograms of pressure use welding flange. Add gasket between two flange plates, and then fasten them with bolts. Flanges with different pressures have different thicknesses and use different bolts. When the water pump and valve are connected with the pipeline, the parts of these equipment are also made into corresponding flange shape, also known as flange connection.
All the connecting parts which are closed at the same time by using bolt connection at the periphery of two planes are generally called “flange“, such as the connection of ventilation pipe, this kind of parts can be called “flange parts”. But this kind of connection is only a part of the equipment, such as the connection between the flange and the water pump, so it is not easy to call the water pump “flange parts”. Smaller ones, such as valves, can be called “flange parts”. The reducer flange is used for the connection between the motor and the reducer, as well as the connection between the reducer and other equipment. Connection method flange connection is to fix two pipes, pipe fittings or equipment on a flange plate respectively, and then add flange gasket between the two flange plates, and fasten them together with bolts to complete the connection. Some pipe fittings and equipment have their own flange, which also belongs to flange connection.
Flange connection is an important way of pipeline construction. Flange connection is easy to use and can bear large pressure. Flange connection is widely used in industrial pipeline. In the home, the diameter of the pipe is small, and it is low pressure, and the flange connection is invisible. If in a boiler room or production site, there are flange connected pipes and equipment everywhere.
According to the type of flange connection, it can be divided into: plate flat welding flange, neck flat welding flange, neck butt welding flange, socket welding flange, threaded flange, flange cover, neck butt welding ring loose flange, flat welding ring loose flange, ring groove face flange and flange cover, large diameter flat flange, large diameter high neck flange, spectacle blind plate, butt welding ring loose flange, etc.