The pipe joint is a connecting tool between the pipeline and the pipeline, and is the connection point between the component and the pipeline that can be disassembled. It plays an indispensable and important role in pipe fittings. It is one of the two main components of hydraulic pipelines. Pipe joints are used for linear connection of instruments, etc. The connection forms are socket welding or threaded connection. Mainly used for small-caliber low-pressure pipelines, used for parts that need to be assembled and disassembled frequently, or for final adjustment of pipelines using threaded pipe fittings. The structure should adopt a metal surface contact sealing structure. The structure of gasket sealing is usually used for conveying water, oil, air and other general pipelines, and it is made of malleable cast iron. In addition, the use requirements and price are also factors to be considered when selecting.

　　 There are also different connections between pipes and pipe joints in hydraulic systems. The screw-in end of the pipe uses a connecting thread. Conical threads rely on their own vertebral bodies to tighten and use materials such as polytetrafluoroethylene for sealing operations, and are mainly used in medium and low pressure hydraulic systems. The sealing effect of fine thread is very good, and it is often used in high-pressure systems, but it requires the use of combined washers or O-rings to close the end face, and sometimes copper washers are used, which are more suitable for connecting pipe walls. In thick pipes, the main components are joint body, connection pipe and nut. When in use, the joint body is embedded in the target, and the end face is sealed with the aforementioned gasket. The joint body and the nozzle are sealed with rubber, and sometimes spherical sealing is used.

Since the pipe joint is a detachable connecting element, it must meet the requirements of normal connection stability, strong sealing, reasonable size, small pressure loss, good process performance, etc., but also must meet the requirements of convenient disassembly and assembly . Therefore, do not underestimate the small pipe joints, because only its existence can support the existence of the entire hydraulic system.

　　 Actually, we can often see pipe joints in our lives. From the above article, we know what types of pipe joints? What are the applications of pipe joints? When we install pipe joints, we may encounter problems that are not easy to install, or there may be water leakage after installation. These problems are probably because the pipe joint is not fully connected, or because the pipe is too hard or too soft to fit the pipe joint completely. When this happens, we can try a few more times