Hard- Surfacing, Building Fusion Welding Carbon Welding Non-Ferrous Metals Heating & Heat Treating Braze Welding Welding Cast Iron Welding Ferrous Metals Brazing & Soldering Equipment Set-Up Operation Equipment For OXY-Acet Structure of Steel Mechanical Properties of Metals Oxygen & Acetylene OXY-Acet Flame Physical Properties of Metals How Steels Are Classified Expansion & Contraction Prep For Welding OXY-Acet Welding & Cutting Safety Practices Manual Cutting Oxygen Cutting By Machine Appendices Testing & Inspecting
3 Open each cylinder valve SLOWLY. Stand in such a position that you can see the cylinder-pressure gauge hand on the regulator, but never stand directly in front of the regulator gauge faces. It is especially important that you open the oxygen cylinder valve only very slightly at first, and that you wait until the cylinder-pressure gauge hand has stopped moving before opening the valve fully. Remember that acetylene cylinder valves should not be opened more than one and one-half turns. Fig. 6-3. Always release regulator pressure-adjusting screw fully before opening the cylinder valve. Fig. 6-4. Always open the oxygen cylinder valve as SLOWLY as possible. Continued on next page...