H.Stars (Guangzhou) Refrigerating Equipment Group Ltd.

  Carbon steel and low-alloy steel heat exchangers (design temperature lower than -20℃), austenitic stainless steel heat exchangers (design temperature lower than -196℃) are low temperature heat exchangers, and the structural design should follow the following in principle. Material selection of  low temperature heat exchanger : 1. Use temperature of plastic materials Polyvinyl chloride (PVC) -15℃~+80℃, polypropylene (PP) -30℃~+140℃, polyurethane (PU) -70℃~+80℃, polyethylene (PE)-100℃~+100 ℃. Plastics tend to be brittle in low temperature environments. 2. Operating temperature of carbon steel and low alloy steel Q345R steel plate can be used at -60℃~-40℃ under low temperature and low stress conditions, and 16MnDR steel plate for low temperature can be used at -80℃~-70℃ under low temperature and low stress conditions. Q235B steel plate cannot be used in low temperature heat exchangers. 3. Operating temperature of high alloy steel (stainless steel) 1. The lower limit of the oper...