Carbon steel flanges are a type of disc-shaped component commonly used in pipeline engineering, always used in pairs. In pipeline projects, flanges are primarily used for connecting pipes. For pipes that need to be connected, a flange disk is installed. Low-pressure pipes can use threaded flanges, while flanges for pressures above 4 kg are焊接 flanges. A sealing point is added between the two flange disks, and then secured with bolts. Flanges of different pressures have varying thicknesses and require different bolts. When water pumps and valves are connected to pipes, the local parts of these equipment are also made into corresponding flange shapes, which are also known as flange connections.