evaporators, heat exchangers, refrigerators and condensers of types IN, IK, TN, TK, KHN, KhK, KN, KK are intended for evaporation, heating, cooling and condensation of liquid and gaseous media in technological processes of the oil refining, petrochemical, chemical and gas industries. Temperature of working media of evaporators and heat exchangers from minus 70°С to plus 350°С, refrigerators and condensers in the tube space from minus 20°С to plus 60°С, in the inter-tube space from minus 20°С to plus 300°С, at conditional pressure in the casing 0.6-4.0 MPa, casing diameter 1000, 1200 mm, heat exchange surface 190-674 m2