. Sheet metal workers' manual; a complete, practical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process . n by thedotted line drawn parallel to the outline of the opening. After the pattern for the vertical pipe has been trans-ferred to metal, the opening is cut on the dotted line bymeans of the circular snips. Using the points of thestraight snips, the lap is then notched, making the cutsabout y2 inch apart around the entire opening. The pipe is now formed up and seamed in the usualmanner. Then using
. Sheet metal workers' manual; a complete, practical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process . n by thedotted line drawn parallel to the outline of the opening. After the pattern for the vertical pipe has been trans-ferred to metal, the opening is cut on the dotted line bymeans of the circular snips. Using the points of thestraight snips, the lap is then notched, making the cutsabout y2 inch apart around the entire opening. The pipe is now formed up and seamed in the usualmanner. Then using the flat pliers, bend the notchedlap outward to fit inside the horizontal pipe, which isslipped over the flange thus made and can be soldered orriveted in position. When constructed from black iron, the short stub is SHEET METAL WORK AND PATTERN DRAFTING 267 slipped over the flange and one or two rivets placed oneach side at point b in the elevation. The flange is thenclosed tightly against the pipe on the inside by means ofthe hammer, making a tight, rigid joint between the twopipes. Pipes of Different Diameters.—Figure 215 shows thefinished view of a T-joint, the pipes being of different. Seam Figure 216.—Plan and Elevation for Right Angled Pipe Joint. diameters, the horizontal pipe being placed in the centerof the vertical pipe at an angle of 90°. Applying themethod given in Figure 214, develop the patterns forthe inclined pipe, also the opening in the vertical draw the plan and elevation shown in Figure216; make the diameter of the large pipe A 4 inches andof the small pipe B 3 inches. The height of the verticalpipe D is 7 inches and the length of the shortest side of 268 SHEET METAL WORKERS MANUAL the horizontal pipe is 3 inches. After the outline of thesmall pipe B has been drawn in the plan-view, draw thehalf section C and divide it into a number of equal draw horizontal lines from these points, intersect-ing the large circle A as shown in the
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Keywords: ., bookcentury1900, bookdecade1910, bookidsheetmetalwo, bookyear1918
