The monograph is devoted to results of researches on an intensification of heat exchange at condensation of hydrocarbon steams in tubular devices of oil refining. In it bases of the theory and practice of condensation of steams and cooling of distillates of fuel fractions are considered. Results of definition of parameters of properties of steams of hydrocarbon raw materials and distillates of fractions are resulted. The influence of technological parameters of condensation of gasoline vapors on the efficiency of heat transfer when heating oil in experimental apparatuses was analyzed. The refined method of calculation of the process and the apparatus for condensation of vapors of fractions of raw materials is offered. The efficiency of the offered method of heat exchange intensification at condensation of hydrocarbon vapors in the shell and tube apparatus of refinery is shown.