SHELL AND TUBE EGR GAS COOLING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a shell and tube EGR gas cooling device attaining reduction of assembly man-hours and reduction of a cost also enhancing heat transfer performance of a pipe unit to obtain stable heat exchange effectiveness, by forming a fin provided in the inside of a heat transfer pipe into an integral structure with the pipe unit. SOLUTION: This shell and tube EGR gas cooling device, formed in a structure arranging a heat transfer pipe group secured in a tube sheet arranged in the inside of a drum pipe in addition securing an end part cap provided with an inflow/outflow port of EGR gas to both end parts of the above drum pipe to secure a tightening flange to the above end part cap, uses a heat transfer pipe protruded to an inner side in a pipe diametric direction integrally with a pipe wall part in the inside to have a fin part continued in a pipe axial direction.