Compared with welded joints, stainless steel joints will not affect the cleanliness of pipelines due to oxide scale pollution during the installation process. Stainless steel joints are widely used in oil, gas, water and other pipeline systems in oil refining, chemical, petroleum, food, pharmaceutical, instrumentation and other fields. Stainless steel joints should be made of precision seamless steel pipes, and hydraulic flared joints are recommended. The stainless steel joint has good sealing performance, which is easy and convenient to use, and the sealing performance of the stainless steel joint is very good. Whether it is blocking the flow of liquid or isolating the vapor, it can give full play to its great effect.