The entire process of product design, manufacturing, testing and inspection to service meets the requirements of the ISO9001 international quality system and GB150-1998 "Steel Pressure Vessel", GB151-1999 "Shell and Tube Heat Exchanger", "Pressure Vessel Safety Technology Supervision Regulations" Regulation. Shell-and-tube heat exchanger is one of our company’s leading products. It has many unique features in heat exchanger structure design, product manufacturing and its application technology. In addition to the conventional shell-and-tube heat exchanger design and manufacturing technology, it is mainly committed to In the development and processing of high-efficiency shell-and-tube heat exchangers with enhanced heat transfer elements, major technological innovations in the field of enhanced heat transfer have made Yian's shell-and-tube heat exchangers highly efficient and stable. Compared with ordinary light tube heat exchangers, the selection of various heat transfer enhancement methods significantly