Shell and tube heat exchangers are ideal equipment for heat exchange between liquid-liquid, liquid vapor, and vapor vapor systems. It has the characteristics of high heat transfer efficiency, low heat loss, compact and lightweight structure, small footprint, easy installation and cleaning, wide application, and long service life. The shell and tube heat exchanger is mainly composed of shell, tube plate, heat exchange tube, head, baffle plate, etc. The materials of shell and tube heat exchangers include ordinary carbon steel, copper, or stainless steel.