The core of the radiator water pipe is responsible for the circulation and transportation of coolant, providing a critical pathway for temperature control in the cooling system. The composite material resistant to high and low temperature (-40 ℃ to 130 ℃) and coolant corrosion is adopted. The tube body bears pressure of 0.5-1.8MPa and is sealed without leakage. The inner wall is smooth to reduce the flow resistance. The interface is compatible with multiple specifications of components, and has anti vibration and anti-aging properties. It is not easy to crack after long-term use. It is suitable for automotive, industrial equipment and other scenarios.