10 is oriented as shown in fig1 and 2 and the other of the plates is inverted from the orientation of fig1 and 2 to permit corresponding lips 26 to abut one another the lips 26 of the pair of the plates 10 are brazed together thus the first surfaces 11 of the pairs of plates 10 are exposed the first surfaces 11 of the pair of brazed plates 10 are then brazed together at the raised lips 18 22 the second beads 36 and the third beads 42 to form a stack 44 a gap 45 is formed between the first surfaces 11 of adjacent heat exchanger plates 50 the first apertures 20 of the heath exchanger plates 50 in the stack 44 are aligned and cooperate to form a first conduit not shown the second apertures 24 of the plates 10 in the stack 44 are aligned and cooperate to form a second conduit not shown a first plurality of flow passages not shown is formed in the heat exchange plates 50 between the second surfaces 13 of brazed adjacent plates 10 a second plurality of flow passages is formed within the gaps 45 formed by the first surfaces 11 of adjacent plates 10 the second plurality of flow passages formed by the gaps 45 between adjacent heat exchanger plates 50 is in fluid communication with a pair of flow headers not shown a first mounting plate 54 is disposed on and brazed to the plate 10 at a first end of the stack 44 a second mounting plate 56 is disposed on and brazed to the plate 10 at a second end of the stack 44 the first mounting plate 54 includes a first aperture not shown that is aligned with the first conduit.