The term heat exchanger in most process industries is referred to as the «shell and tube heat exchanger». As the name implies, it is equipment that as a «shell» and a bundle of «tubes». One of the fluids flows inside the shell and outside the tubes and the other fluids inside the tubes

The Camprofile gasket style 942, combines the pressure resistance of flat metal gaskets with the excellent sealability of the flexible graphite or the expanded PTFE tape. It can be used up to 3700 psi (250 bar) operating pressure and up to 1100°F maximum temperatures. The flexible graphite or expanded PTFE fill the flange irregularities and prevents the serrated finish from damaging the flanges.