Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . c / Take the distance i 2,.Fig. 14, and from i. Fig. 19, as a center, strike the arc 2. Then take the hypotenuse O2, Fig. 17, and from 0, Fig. 19,as a center, cut the arc 2; then take the hypotenuse and from2, Fig. 19, as a center, cut the arc ;, and connect the points soestablished with lines. Then take the distance 2, 3, Fig. 14,and from the point 2, Fig. 19, strike the arc 3: then take thedistance jk, Fig. 15, and from the po
Laying out for boiler makers and sheet metal workers; a practical treatise on the layout of boilers, stacks, tanks, pipes, elbows, and miscellaneous sheet metal work . c / Take the distance i 2,.Fig. 14, and from i. Fig. 19, as a center, strike the arc 2. Then take the hypotenuse O2, Fig. 17, and from 0, Fig. 19,as a center, cut the arc 2; then take the hypotenuse and from2, Fig. 19, as a center, cut the arc ;, and connect the points soestablished with lines. Then take the distance 2, 3, Fig. 14,and from the point 2, Fig. 19, strike the arc 3: then take thedistance jk, Fig. 15, and from the point ;, Fig. 19, strike thearc k. Take the hypotenuse 73, Fig. 17, and from /, Fig. 19,cut the arc 3. Then take the hypotenuse ^3, Fig. 16, and fromthe point 3, Fig. 19, cut the arc k. Connect these points withlines as before. Continue this process until you have estab-lished the point 9, Fig. 19, and described the arc /;. Thentake the distance /19, Fig. 10, and from the point 9, cut thearc /(. Connect hg with a line, and half of the pattern of thesection is completed, with the exception of adding the laps. MISCELLANEOUS PROBLEMS IN LAYING OUT 187 312 li 4- X H2. ^I 5 w •<llfl» ^p^ |iwy 01 pnM|j snnd »l«ld ^ 2 u-1 S 2 P 22 O 2 < O 2 c HO 2 o c2 2 i88 LAYING OUT FOR BOILER MAKERS A Flue and Return Tubular IVlarine Boiler. The flue and return tubular type_ of marine boiler is littleused to-day, having been superseded by Scotch and water tubeboilers, which are much better able to carry the high pres-sures now used in marine work. In proportion to the spaceoccupied, the flue and return tubular boiler has, however, alarge grate area and for a low working pressure it is difficultto design a boiler which will be more efficient. The furnaces, which are three in number, are surrounded bywater legs sM inches wide. At the rear of the furnaces is acombustion chamber from which ten large flues, ranging the front shell and side sheets 19/32 inch; of the furnacesand steam chimney sh
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Keywords: ., bookcentury1900, bookdecade1900, bookidl, booksubjectsteamboilers
