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 . T is placed over the frame in position. The exact location of the cross-tie would depend on thesize of the boiler, the amount of expansion, etc. The totalexpansion and contraction would have to be taken care of bythe bending back and forth of this sheet; on the average sizeboiler about H inch would be required. The cross-tie wouldbe located ^ inch back from the vertical line, so that whenthe boiler is headed up and in working co
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 . T is placed over the frame in position. The exact location of the cross-tie would depend on thesize of the boiler, the amount of expansion, etc. The totalexpansion and contraction would have to be taken care of bythe bending back and forth of this sheet; on the average sizeboiler about H inch would be required. The cross-tie wouldbe located ^ inch back from the vertical line, so that whenthe boiler is headed up and in working condition, the lugs onthe mud ring would be ;4 inch back from the cross-tie, or theexpansion would be about central with this cross-tie. The locomotive frames at -the strongest are very flexibleand flimsy sidewise, and for this reason they are tied togetherwith numerous cross-ties, waste sheets, etc. Throughout thewhole construction, however, a certain amount of expansionmust be provided for. Fig. 142 shows a waste sheet. There is one or more of thesesheets on nearly every boiler. The method of attaching thesheet to the boiler and frames depends somewhat upon the. properly without being bent one way or the other. It is oftennecessary to heat the angle-iron to get it to fit up nicely onall sides. A certain number of equal spaces is laid off alongthe angle-iron and the hoies are punched. In this connectionit should be mentioned that punching these holes in the outerleg will distort the angle in some cases, so that it will not fitthe boiler. Therefore, these holes should be punched beforethe angle is bent and fitted to the shell. Having placed theangle-iron in position, and secured it with several clamps,wedge it up at several places tight against the boiler, alsowedge the sheet D down tight against the knee. Now markoff the holes for the angle on to the waste sheet. If the angle-iron projects, or the sheet projects beyond the angle, lay offa line on the sheet so that when this is s
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Keywords: ., bookcentury1900, bookdecade1900, bookidl, booksubjectsteamboilers
