Steam boiler explosions, in theory and in pactice; . undpeculiarly dangerous, as, in even exceedingly thinlayers, they are such perfect non-conductors as tospeedily cause overheating, strains, cracks, leakage, and,often, explosion. M. Arago mentions a case in whichrupture occurred in consequence of the presence of a raglying on the bottom of a boiler.# The effect of incrustation in causing the overheatingof the fire-surfaces, the formation of a pocket, andfinal rupture, is well shown in the three illustrationswhich follow. When the water is fully up to the safe level, as at theright in the fir
Steam boiler explosions, in theory and in pactice; . undpeculiarly dangerous, as, in even exceedingly thinlayers, they are such perfect non-conductors as tospeedily cause overheating, strains, cracks, leakage, and,often, explosion. M. Arago mentions a case in whichrupture occurred in consequence of the presence of a raglying on the bottom of a boiler.# The effect of incrustation in causing the overheatingof the fire-surfaces, the formation of a pocket, andfinal rupture, is well shown in the three illustrationswhich follow. When the water is fully up to the safe level, as at theright in the first of the three figures, the heat receivedfrom the furnace gases is promptly carried away by thewater and the sheet is kept cool. When the water fallsbelow that level, or is prevented, by incrustation, fromtouching the metal, as in the left-hand illustration, thesheet becomes red-hot, soft, and weak, and yields asshown. When this goes on to a sufficient extent, as on * Report of the Committee of the Franklin Institute. SEDIMENT AND INCRUSTATION. 7S.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectsteambo, bookyear1887
