evaporators services – A shell and tube heat exchanger belongs to a category of heat exchangers. It’s the most frequent heat exchanger in oil refineries and other major chemical processes, and it’s designed for higher-pressure applications. This form of heat exchanger consists of a shell (a huge pressure vessel) with a bundle of tubes inside it, as the name suggests. To transfer heat between the two fluids, one fluid goes through the tubes and another fluid flows over the tubes (via the shell). A tube bundle is a collection of tubes that can include plain tubes, longitudinally finned tubes, and so on.