fire tubes
Flue Flue (fl[=u]), n. [Cf. OF. flue a flowing, fr. fluer to flow, fr. L. fluere (cf. {Fluent}); a perh. a corruption of E. flute.] 1. An inclosed passage way for establishing and directing a current of air, gases, etc.; an air passage; esp.: (a) A compartment or division of a chimney for conveying flame and smoke to the outer air. (b) A passage way for conducting a current of fresh, foul, or heated air from one place to another. (c) (Steam Boiler) A pipe or passage for conveying flame and hot gases through surrounding water in a boiler; -- distinguished from a tube which holds water and is surrounded by fire. Small flues are called {fire tubes} or simply tubes. [1913 Webster]

2. In an organ flue pipe, the opening between the lower lip and the languet. [Webster 1913 Suppl.]

{Flue boiler}. See under {Boiler}.

{Flue bridge}, the separating low wall between the flues and the laboratory of a reverberatory furnace.

{Flue plate} (Steam Boiler), a plate to which the ends of the flues are fastened; -- called also {flue sheet}, {tube sheet}, and {tube plate}.

{Flue surface} (Steam Boiler), the aggregate surface of flues exposed to flame or the hot gases. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

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