firetube

English

Etymology

From fire +‎ tube.

Noun

firetube (plural firetubes)

1. A tube conveying hot gas in a boiler.
   • 1959 September, P. Ransome-Wallis, “The British Railways Class "9" 2-10-0s”, in Trains Illustrated, page 420:

     In a conventional boiler, the hot gases from the firebox, after passing through the firetubes, arrive in the smokebox and then pass up the chimney to atmosphere.

Related terms

• boiler tube