History
Initially the boilers were designed with 4 drums and 3 drums like the Stirling boiler. The single drum at the bottom and three at drums on the top were connected through a network of tubes which were welded to the drums above and the single drum below. The rational demand of steam in terms of capacity, pressure and temperature resulted in bi drums and single drum boilers.
Read more about this topic: Steam Drum
Famous quotes containing the word history:
“Revolutions are the periods of history when individuals count most.”
—Norman Mailer (b. 1923)
“To summarize the contentions of this paper then. Firstly, the phrase ‘the meaning of a word’ is a spurious phrase. Secondly and consequently, a re-examination is needed of phrases like the two which I discuss, ‘being a part of the meaning of’ and ‘having the same meaning.’ On these matters, dogmatists require prodding: although history indeed suggests that it may sometimes be better to let sleeping dogmatists lie.”
—J.L. (John Langshaw)
“Social history might be defined negatively as the history of a people with the politics left out.”
—G.M. (George Macaulay)