A flange is an interconnected part of a pipe and pipe that is used for the connection between the ends of the pipe. Flanges are also used at the inlet and outlet of the device for the connection between two devices (for example, the reducer flange). Flange or flange connection is a detachable connection of flanges, washers and bolts to each other in a sealed structure. Pipe flanges are flanges used in pipes for pipe use and are used in equipment to refer to the inlet and outlet flanges of equipment. There are holes in the flange and the two bolts are tightly connected to the flange. Between the flange gasket seals. Flange threaded (threaded) flange, welded flange and clamping flange. The flanges are used in pairs, and the low pressure pipes can be used to connect flanges with over four kilograms of pressure welded flanges. Use a washer between the two flanges and then bolt them together. Different flange thicknesses, they use different bolts. Pumps and valves, as well as pipe connections, these devices, local equipment, are also made into corresponding flange shapes, also known as flange connections. A part that is closed at the same time by bolting around the two planes, commonly referred to as a "flange", such as a vent tube connection, may be referred to as a "flange part." But this connection is only part of the equipment, such as the flange and the pump connection, so the "flange part" called the pump is not good. Relatively small, such as valves, etc., may be referred to as "flange components."The gear unit flange is used to connect the motor to the gear unit and to the connection between the gear unit and other equipment.