Ferrule type pipe fittings are sealing pipe fittings suitable for non corrosive or corrosive media such as oil, water, and gas. The specification requirements for aluminum-plastic pipes are relatively flexible, and after connecting with pipelines, they have the characteristics of reliable connection and good sealing performance. Therefore, they are widely used in systems such as oil refining, chemical industry, light industry, textile, national defense, metallurgy, aviation, and ships; It is also suitable for hydraulic transmission pipelines in various mechanical engineering, machine tool equipment, and other fields.