Heat exchange – With coated – roughened or polished surface
Patent
1981-01-27
1984-07-24
Bartis, A.
Heat exchange
With coated, roughened or polished surface
138DIG3, 138114, 165154, 219299, 219306, 219316, 219523, 264230, 285 55, 338262, 338268, F28F 1904, H05B 382, F24H 120
Patent
active
044613474
ABSTRACT:
A heat exchange assembly for raising a process fluid, such as ultra-pure, de-ionized water, to an elevated temperature without adversely affecting the quality thereof includes coaxially-arranged inner and outer pipes, the annular space therebetween defining a flow passage for the fluid to be heated. The inner pipe is formed of high-strength metal of good thermal conductivity and encloses a heat source, such as steam, circulating heated fluid or an electric heater. The inner pipe is ensheathed by an extruded heat-shrinkable plastic tube of non-reactive material, such as PTFE or polypropylene not exceeding 7 mils in thickness, which is shrunk-fit thereon to form one wall of the flow passage. The opposing wall of the passage is formed by the interior surface of the outer pipe which is also constituted by non-reactive plastic material such as PTFE or polypropylene. Terminations comprising all-plastic unions are provided at the ends of the inner and outer pipes to couple the passageway to inlet and outlet fitting for the process fluid. The outer pipe may be reinforced by a braided outer sleeve.
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Fenton William
Layton Howard M.
Bartis A.
Ebert Michael
Interlab Inc.
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