in the process of pressing with special tools, the tools are pressed evenly inward along the outer edge of the sealing section of stainless steel water pipes, and the scientific compression ratio is calculated according to the thickness of different rubber sealing rings, that is, sealing bags. Therefore, it has high tensile strength, good sealing performance, more scientific, firmer and durable. Scope of application: Used for connection of pipes with diameters dn15-dn15, widely used in gas, water supply and drainage, fire fighting and other fields.