Manufacturing process and description of composite tube heat exchangers

Thread Content

The composite process for composite pipes involves combining the inner and outer tubes using a special synthesis method under appropriate environmental and deformation conditions, thereby creating the composite pipes in use today. The composite process for composite pipes involves: performance testing of the base pipe → cleaning → surface treatment → pre-assembly → compounding → inspection → cutting to specified length → marking. For the manufacture of heat exchangers using these composite pipes, different tube sheet manufacturing methods can be employed depending on the operating conditions and design pressure; these methods include expansion jointing or welding followed by expansion jointing. Tungsten inert gas welding is used as the welding method. Due to expansion jointing, the ends of the composite titanium pipes expand, and flanging of these expanded ends helps to protect the ends of the base pipe. Since composite titanium tubes are highly prone to burnout and oxidation when heated, to avoid this problem and also taking into account ease of operation and reduced protection costs, we developed and adopted a new method for protecting titanium tubes, and achieved success. This method features simple processing, low cost, good protection effects, and has been granted a **patent. For the corrosion protection of tube sheets, we employ our patented technology – the \"Composite Heat Exchange Tube and Its Tube Sheet Anti-Corrosion Structure\", which, as proven through field applications, offers reliable protection and easy maintenance.