steel tubes to be used for boiler, condensers, and so on

Detailed Product Description:

Our spec covers steel tubes to be used for boiler, condensers, and similar heat-transfer apparatus.Our tubing sizes usually furnished to this specification are to 3 in. [76.2 mm] in outside diameter, inclusive. Tubing having other dimensions may be furnished, provided such tubes comply with all other requirements of this specification. After welding, all tubes shall be heat treated at atemperature of 1650°F [900°C] or higher and followed by cooling in air or in the cooling chamber of a controlled atmosphere furnace.