. 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 . Figure 281.—Welding by the Oxy-Acetylene Process of a Double-Jacketed Steel Tank Used for Heating Purposes. A cut should start from the edge of the metal wheneverpossible. When it is desired to cut a piece out of thecenter of a plate, start inside the circumference of the OXY-ACETYLENE WELDING AND CUTTING 349 piece to be cut (Figure 277). On thick plate, where thecut cannot be started from the edge
. 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 . Figure 281.—Welding by the Oxy-Acetylene Process of a Double-Jacketed Steel Tank Used for Heating Purposes. A cut should start from the edge of the metal wheneverpossible. When it is desired to cut a piece out of thecenter of a plate, start inside the circumference of the OXY-ACETYLENE WELDING AND CUTTING 349 piece to be cut (Figure 277). On thick plate, where thecut cannot be started from the edge, it may be necessaryto drill to get a quick start. Precautions.—Certain precautions are necessary beforethe operator starts to work on a piece of metal. A bucket. Figure —The Oxy-Acetylene Process of Lead Burning, as Used onFlat Sheet Work. of water should be near at hand, for cooling the cuttingtip when necessary. Both oxygen and acetylene shouldbe shut off at the blowpipe, to extinguish the flame, beforedipping the tip of the blowpipe into the water. To expelany steam formed inside the tip, turn on the oxygen 350 SHEET METAL WORKERS MANUAL valves at the blowpipe, and allow oxygen to flow for amoment before turning on the acetylene and lighting. When an operator is working in a confined place, suchas inside a boiler, he should have an attendant to turnoff the gas supplies at the cylinders if necessary. It isalso advisable under these conditions to employ armoredfireproof hose. If the blowpipe tip becomes obstructed in any way,due to beads of iron being splashed over it, or from anyother cause, a copper wire or copper wire brush should beused to clean it. No sharp or hard instrument should beemployed. Colored-lens glasses or goggles shou
Size: 1589px × 1572px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookidsheetmetalwo, bookyear1918
