Sintered High Flux Tube      Sintered high flux tube is a new product combining metal powder sintered method and machining technology. It can improve the heat transfer coefficient of the inside and outside tubes, thus it can significantly improve overall heat transfer coefficient of heat transfer tubes.The current case-hardened products :    OD vertical flute/ ID sintered porous coating, OD sintered porous coating /ID low fins , ID sintered porous coating, OD sintered porous coating