... the flanges are assembled to form a heat exchanger, import and export, and with (PP, PVC, PTFE, PVDF frame) assembly ... workpiece. ApplicationUse of advanced manufacturing equipment and process control tools, tubes and flanges of hot-melt welding, ... tin, zinc, electrolytic, acid plating, anodizing and chemical industry, hospitals, food and other corrosive solution heating, cooling, evaporation, ...