firetube

English

Etymology

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.
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