- 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.
