Pipe fittings can generally be divided into three types according to the connection method and function:
1. Union (detachable) pipe fittings: Union pipe fittings are detachable pipe fittings, which are usually connected to pipes by means of threads, clamps or quick connections. This type of pipe fitting is convenient for installation and maintenance, and is suitable for occasions that require frequent disassembly and replacement.
2. Fixed (non-detachable) pipe fittings: fixed pipe fittings are a kind of permanent pipe fittings that connect pipelines, and are often used in occasions that require durable and stable connections. This type of pipe fittings is usually welded, glued or locked, with high safety and sealing.
3. Special pipe fittings: Special pipe fittings are pipe fittings designed to meet special requirements, such as elbows, tees, crosses, eccentric pipes, etc. They are used to change the direction of pipes, diverge, merge and solve connection problems between different heights or angles in piping systems.
These types of pipe fittings have different characteristics and scope of application, and the specific selection should be determined according to the pipe material, application requirements, and relevant codes and standards.
