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
8 Lighting the Flame In lighting the torch and adjusting the flame, always follow the manufacturer’s instruction for the specific torch being used. In general, the procedure to be followed in lighting an oxy-acetylene welding or heating torch is this: 1. Open the torch acetylene valve about one-half turn. 2. Immediately light the flame with a friction lighter. NEVER USE A MATCH. Fig. 6-7. After pressurizing both hose lines (with torch valves tightly closed) test for leakage at the following points, using an approved leak-test solution or a thick solution of Ivory soap and water: (1,2) Acetylene cylinder connection and acetylene cylinder valve spindle (3) Acetylene regulator-to- hose connection (4) Oxygen valve spindle (5) Oxygen cylinder connection (6) Oxygen regulator-to-hose connection (7,8) Hose connections at the torch (9) Torch tip (for leakage past the torch valves). Later, after lighting the torch, check for leakage at the throttle valve stems (A,B) and at the welding head-to-torch handle connection (C). Continued on next page...