. Railway mechanical engineer . - be expected from it. The superheater re-quires a minimum of attention to keep it in good condi-tion. If it is not given this attention, the superheater maybe injured; but the performance of the locomotive certainlywill be injured. CLEAN FLUES Examine a piece of metal that has been lying in a bedof cinders and note the corrosion that has taken that there is added to this corrosion the effects of thehigh temperature reached by cinders, soot and clinkers, whichare lying in a boiler flue, and vou will have an idea of the. Distorted Ends of Superheate
. Railway mechanical engineer . - be expected from it. The superheater re-quires a minimum of attention to keep it in good condi-tion. If it is not given this attention, the superheater maybe injured; but the performance of the locomotive certainlywill be injured. CLEAN FLUES Examine a piece of metal that has been lying in a bedof cinders and note the corrosion that has taken that there is added to this corrosion the effects of thehigh temperature reached by cinders, soot and clinkers, whichare lying in a boiler flue, and vou will have an idea of the. Distorted Ends of Superheater Units. One Result ofStopped-Up Flues conditions imposed upon superheater units when the fluesare not kept clean. A continuation of these conditions islikely to result in burned and warped unit pipes, and burned-off unit bands and supports, permitting the unit to vibratein the flue. Sooner or later this will necessitate repairs tothe superheater, which will require the locomotive to be heldout of service. This might be called the indirect result ofnot keeping the flues clean; the direct result is the shuttingoff of part of the hot gases from reaching the superheaterunits and also the evaporative surface of the flue; the amountof superheat in the steam falls off and the effective per-formance of the locomotive is reduced. If the flue becomes December. 1918 RAILWAY MECHANICAL ENGINEER 653 completeh stopp>ed up, the effect is aggravated. One largeflue of a 2 5-unit locomotive superheater stopped up in thisway, reduces the capacity of the superheater 4 per
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
