"DOUBLE PIPE HEAT EXCHANGER" . . "u20683" . "A tubular heat exchanger that consists of two co-axial pipes of different sizes, where one fluid passes though the inner pipe and the other fluid passes through the space between the inner and the outer pipes." . "2005.11.15" . "RDS440459" . "Qualified" . "670700" . "\"" . "DOUBLE PIPE HEAT EXCHANGER" .