. Railway mechanical engineer . ully with anopening of y$ in., no more and no less, between bevel than l/% in. opening between the sheets will not permitthe welding flame to penetrate the weld properly and agreater opening requires too much filler metal to be used,not only increasing the cost of the weld, but making it im-possible to keep the surface of the weld opposite the torchsmooth. This rough surface permits lamination and seams 772 December. 1921 RAILWAY MECHANICAL ENGINEER 773 on water >idc of the sheet, weakening the weld and per-mitting early corrosion of the meta
. Railway mechanical engineer . ully with anopening of y$ in., no more and no less, between bevel than l/% in. opening between the sheets will not permitthe welding flame to penetrate the weld properly and agreater opening requires too much filler metal to be used,not only increasing the cost of the weld, but making it im-possible to keep the surface of the weld opposite the torchsmooth. This rough surface permits lamination and seams 772 December. 1921 RAILWAY MECHANICAL ENGINEER 773 on water >idc of the sheet, weakening the weld and per-mitting early corrosion of the metal which tends to partthe sheets. 11. All other precautions may be carefully made and yet afaulty weld will In- made if due care is not taken to allow forexpansion and contraction of the sheet-. Where it is not le to obtain the necessary expansion and contractionthrough curves of the adjacent sheets, it is then necessaryto provide some method to take care of expansion and con-traction. In this case all sheets and patches will be. Fig. 2—Method of Laying Out Patches for Welding corrugated, as shown in Fig. 1. A strain on a weld, espe-cially where the new sheet is welded to an old sheet, whichis generally the case, is particularly harmful as the oldsheet will not stretch as much or as uniformly as the new-one. 12. When fitting corrugated sheets or patches, they should bebolted securely in place and when they extend to the mudring good drift pins should be inserted in the mud ring holesso that the sheet cannot move upward due to the contraction
Size: 1752px × 1427px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectrailroadengineering
