Page 453 - Handbook of Energy Engineering Calculations

FIGURE 13 (a) spiral flow in both channels is widely used; (b)
Spiral flow in one channel, axial flow in the other; (c) combination flow
is used to condense vapors; (d) modified combination flow serves on

column. (Chemical Engineering.)

Spiral-plate exchangers are fabricated from any material that can be cold
worked and welded, such as carbon steel, stainless steels, Hastelloy B and C,
nickel and nickel alloys, aluminum alloys, titanium, and copper alloys. Baked