The properties of a boiler tube are dependent only upon the geometry and material of construction. The only thermal property of interest for a plain wall tube is the thermal conductivity at the temperature of interest, which provides a means of calculating the thermal resistance for conduction through the wall. If the boiler tube is finned on the outside then the geometry and application data will provide a means to determine the total extended surface area and the fin efficiency. Two good references for boiler applications are Process Heat Transfer by Hewitt, Shires and Bott and Steam Its Generation and Use by Babcock & Wilcox.
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