Flange is a kind of disk-shaped parts, which is common in pipeline engineering. Flanges are used in pairs.
All connecting parts that are bolted on two planes and closed at the same time around are generally called "flanges", such as the connection of ventilation pipes. This kind of parts can be called "flange parts". However, this connection is only a part of the equipment, such as the connection between the flange and the water pump, so it is not good to call the water pump "flange parts". Smaller ones, such as valves, can be called "flange parts".
In pipeline engineering, flanges are mainly used for the connection of pipelines. Install a flange on the pipes that need to be connected. Threaded flanges can be used for low-pressure pipes, and welded flanges can be used for pressure above 4kg. Add sealing points between the two flanges, and then fasten them with bolts. Flanges with different pressures have different thicknesses and use different bolts. The neck height of the flange with neck is low, so the stiffness and bearing capacity of the flange can be improved. Compared with butt welded flanges, the welding workload is large and the consumption of welding rods is high, which can not withstand high temperature and high pressure, repeated bending and temperature shaking. However, the on-site device is convenient, and the process of weld patting and rubbing injury can be omitted, which is more popular. Flange plate with neck butt welding: neck flange welding is usually called "high hub" flange. Its purpose is to transfer pressure to the pipeline, thereby reducing high stress concentration in France. Neck flange welding is a good design for butt welding those flanges that provide structural value due to their own existence. However, the price is relatively high, because the consumption process of the product is complex. Threaded (threaded) flange: the threaded flange is connected with threads. However, the center of the product has the thread size corresponding to the pipe. Its main advantage is that it can be assembled without welding.
