Railway and Locomotive Engineering . - 122 RAILWAY AND LOCOMOTIVE ENGINEERING. April, 1916. abilir>- to the forms and sizes of the fire-boxes, the same form of firebrick not be-ing, as may be imagined, equally adapta-ble to all. Referring at;ain to the water tubes it practice when first applied to ex-pand and bead the flues steel to steel, butin old work it is recommended after holesmay be slightly worn to ream the holesand apply copper ferrules. In all cases alarger amount of metal should be al-lowed to project—at least .^s-inch—to se- oontrast that in regard to the use of thesuperh
Railway and Locomotive Engineering . - 122 RAILWAY AND LOCOMOTIVE ENGINEERING. April, 1916. abilir>- to the forms and sizes of the fire-boxes, the same form of firebrick not be-ing, as may be imagined, equally adapta-ble to all. Referring at;ain to the water tubes it practice when first applied to ex-pand and bead the flues steel to steel, butin old work it is recommended after holesmay be slightly worn to ream the holesand apply copper ferrules. In all cases alarger amount of metal should be al-lowed to project—at least .^s-inch—to se- oontrast that in regard to the use of thesuperheater while it increases the effi-ciency of the steam generated and de-creases tlic amount of steam consumed|iir horse power hour, it docs not increasethe boiler efficiency. The brick arch onthe other hand increases tlie boiler ca-|i:icity directly by adding to the evapor-ating surface by aiding combustion andby reducing the heat losses. This is ac-coniplislied by forming a sort of combus-litin chamber on what would otherwise be. boiler efficiency from this item alone. Reports from many roads indicate asmoke reduction of 50 per cent, by theuse of the arch, and in regard to flue re-pairs, reports from 35 roads show anaverage reduction of 45 per cent., and37 others reported much less work fromflue plugging. This being the case it showsthat there is already a large reduction inroundhouse work by the use of the brickarch, while the marked improvement indesigns, especially in the matter of usinwsmaller sections of brick makes the appli-cation and repair of the device compara-tively easy of accomplishment. K\V TllKiircll HOOK. cure the impossibility of any tendency to apossible withdrawing of the flue. Inregard to this tendency to accident whichis common to all mechanical devices sub-ject to high pressures, it may be statedthat there were tubes of this kindin use in 191-4, and 12 accidents were re-ported, 6 of which were due to improperapplication, 3 to negligenc
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyork, bookyear19
