High flux pipe is specifically designed to enhance heat transfer coefficient. A thin, porous metal layer is bonded metallurgically to the heat transfer surface. This pore make liquid produce a large number of bubbles at low superheat, which enhance heat transfer. At the same time, porous structure formed many boiling centre, the film boiling changes to nucleate boiling. So boiling side heat transfer coefficients of 10-30 times that of bare tubes can be achieved, resulting in an overall heat transfer improvement of 2-4 times that of bare pipes. The main application: Overhead cooler Reboiler of ethylene separation Ethylene glycol unit evaporation tower Seawater desalination etc.