Extended spray gun straight pipe is a key accessory used in various spray gun systems. Its main function is to increase the working distance and flexibility of the spray gun, and improve the convenience and efficiency of operation. It increases the distance between the spray gun and the spray source, so that the spray gun can operate at a longer distance or in areas difficult to reach. Its design considers the optimization of the spray angle, spray distance and spray effect, to ensure the uniformity and coverage of spray. The interface design of the extended spray gun straight pipe needs to match the interface standard of the spray gun and the spray system. Common interface types include threaded connection, quick release connector, etc. By using an extended straight pipe of the spray gun, the operating range and flexibility of the spray gun can be significantly improved, especially during cleaning, high-pressure spraying, or spraying processes, which can more conveniently reach difficult to reach areas and improve work efficiency.