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A fitting for a two flat tube serpentine heat exchanger having high burst pressure comprises a header plate with two slots for receiving the flat tubing and a cover plate with a port, a nipple protruding from the port, and a recess surrounding the port and extending over the slots to provide communi

A fitting for a two flat tube serpentine heat exchanger having high burst pressure comprises a header plate with two slots for receiving the flat tubing and a cover plate with a port, a nipple protruding from the port, and a recess surrounding the port and extending over the slots to provide communication between the port and the slots. The plates are formed by extrusion with the appropriate apertures, cut to the desired thickness and the recess is milled out, or the plates and apertures are stamped from sheet rock. The plates are welded together at their common periphery or brazed together at their margins outboard of the recess.

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The method of making a fitting for a heat exchanger having flat tubing comprising the steps of; forming a rectangular aluminum plate having slots for coupling with heat exchanger tubing, forming a second rectangular aluminum plate having a round opening for coupling with a nipple, forming a recess i

The method of making a fitting for a heat exchanger having flat tubing comprising the steps of; forming a rectangular aluminum plate having slots for coupling with heat exchanger tubing, forming a second rectangular aluminum plate having a round opening for coupling with a nipple, forming a recess in the second plate around the opening of sufficient size to couple the opening to the slots when the plates are assembled, assembling the first and second plates at an interface and assembling a nipple into the opening, and bonding the second plate to the first plate and bonding the second plate to the nipple at the opening.