Patent ID: 7658224

Claim:
A heat exchanger comprising: a plate pair including first and second plates each having an outward depression extending to a peripheral edge thereof, the first and second plates defining a fluid channel therebetween and secured to one another with the outward depressions defining a flow opening in communication with the fluid channel, the first plate including an integral semi-annular first plate flange portion formed about a periphery of the first plate outward depression at a peripheral edge of the first plate and the second plate including an integral semi-annular second plate flange portion formed about a periphery of the second plate outward depression at a peripheral edge of the second plate, the semi-annular first and second plate flange portions collectively providing an outer flange extending substantially around a periphery of the flow opening; and a tubular fitting with a first end and an outer surface having an annular flange thereon spaced apart from the first end, the tubular fitting being secured to the plate pair with the first end received within the flow opening and the annular flange abutting against the outer flange.