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
5 Fig 4-4. The degree of excess oxygen in the oxidizing flame is expressed in terms of the percent shortening of the inner cone length, when adjustment is made by increasing the oxygen flow beyond that required to produce the neutral flame. The degree of excess acetylene in a flame is expressed by comparing the lengths of the inner cone and of the excess acetylene feather, measuring both from the face of the tip. NEUTRAL OXIDIZING EXCESS ACETYLENE X 2X %