The type C is the female leather pipe joint, also called the female end water pipe joint, the female end water pipe joint, the female pagoda joint, is suitable for the quick connection with the leather pipe, the water pipe, the hose, the trachea, the oil pipe.The quick joints can be divided into: quick joints for air, quick joints for oxygen fuel gas, quick joints for gas-liquid sharing, quick joints for oil pressure, quick joints for inert gas, quick joints for cooling water and oil, and quick joints for semiconductor.This paper mainly introduces the handle type quick coupling used in petrochemical industry.