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 . three times the thickness ofthe plate, by multiplying the outside diameter of the boiler and subtracting three times the thickness of the plate,or by multiplying the mean diameter of the boiler measured to the center of the thickness of the plate by The lattermethod is the correct one to use. Since the inside diameter is60 inches, and the thickness of plate 7/16 inch, the mean diame-ter will be 60 7/16 inches. T
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 . three times the thickness ofthe plate, by multiplying the outside diameter of the boiler and subtracting three times the thickness of the plate,or by multiplying the mean diameter of the boiler measured to the center of the thickness of the plate by The lattermethod is the correct one to use. Since the inside diameter is60 inches, and the thickness of plate 7/16 inch, the mean diame-ter will be 60 7/16 inches. The circumference corresponding tothis diameter is inches. If the circumference corre-sponding to the inside diameter had been found and threetimes the thickness of the plate added, the result would havebeen inches. If the circumference corresponding to theoutside diameter had been found and three times the thicknessof the plate subtracted, the result would have been The circumference, inches, will be the length of theplate for a butt joint. For a treble-riveted lap joint the dis- -^8-t ^2;<- *r*C ip^S^i^eutiai Circumferetee. FIG. 13.—PLAN AND ELEVATION OF HEAD. tance between tlie rivet holes and the laps must be added. As-suming a distance between rivet holes of i j^ inches and a lapof ij^ inches, the length of the plate would be -f2XiH+2Xi^ = +6= 195-87 would be the length for the large course. Make the smallcourse six times the thickness of the plate shorter. It is agood idea to allow 3/s inch more for squaring up the sheet,making the total length about 19634 inches. In determining the length of the boiler we will figure on using14-foot flues. It will be necessary to make allowance for thebeading of the flues, which would require, roughly, J4 inch ateach end, making 1^4 inch in the total length; therefore, thelength of the boiler from outside to outside of the heads willbe 13 feet ii;2 inches. We will assume th
Size: 1428px × 1750px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, bookidl, booksubjectsteamboilers
