Airco welding of locomotive fireboxes . down tothe mudring at 5. A should be done last. Operation 5. When the weld is cold, preheat at xxxl, and weldfrom 6 to 1, 7 to 6 on down to the mudring at A. WELDING ON PATCH OF FIGURE 33: Operation 6. Preheat along xxxl. Then tack at 1 and weldover about 10 from 2 to 1 and 3 to 2. Let the plate get cold. Operation 7. Preheat again at xxxl and weld from 4 to preheat at xxxo and weld from 5 to 4. Let the sheet get cold. Operation 8. Preheat at xxx3 and weld from 6 to 3. Againpreheat at xxx5 and weld from 5 to 6. Note : Figure 34 shows the proper wa
Airco welding of locomotive fireboxes . down tothe mudring at 5. A should be done last. Operation 5. When the weld is cold, preheat at xxxl, and weldfrom 6 to 1, 7 to 6 on down to the mudring at A. WELDING ON PATCH OF FIGURE 33: Operation 6. Preheat along xxxl. Then tack at 1 and weldover about 10 from 2 to 1 and 3 to 2. Let the plate get cold. Operation 7. Preheat again at xxxl and weld from 4 to preheat at xxxo and weld from 5 to 4. Let the sheet get cold. Operation 8. Preheat at xxx3 and weld from 6 to 3. Againpreheat at xxx5 and weld from 5 to 6. Note : Figure 34 shows the proper way to round the corners of the patches,using a radius of about 54. In preparing all of the joints, use a bevel of about45° and leave the vee open about 3/16 at the bottom, as shown in Figure 35. In using the diamond patch of Figure 36, the welding should be done inthe same way as that described for the triangular patches. Expansion must beprovided for by the proper preheating and reheating at the ends of the line ofweld. Page Nineteen. u 060o0o°o°o°o°oOo°n° ogogogogogogogogogo po°o2p2p2o2o2p8o2p*0ogogogogogpgogo° °° ° Oo2o°o2ogo2o° o o o UcPogoU00 o o oo o o o o o
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Keywords: ., bookcentury1900, bookdecade1910, bookidaircowelding, bookyear1919
