2 Oxy-fuel ProceduresOxy-fuel combines pure oxygen which will not burn until combined with a combustible fuel gas such as acetylene, propylene, or propaneAcetylene is the combustible fuel used by most agricultural mechanics
3 Oxy-fuel ProceduresHeat from the oxy-fuel process is used to cut or weld and to heat for bending, shaping and tempering metal
4 SafetyUse soapy water to check lines, valves, and soft plugs for leaksAcetylene pressure should NOT be more than 15 psi (pounds per square inch)The acetylene cylinder tank valve should be opened ¼ to ½ turn for useOxygen and acetylene cylinders should be turned on and off quickly before attaching regulators to blow dust from openings
5 SafetyWhen the oxyacetylene unit is NOT in use, the regulator adjusting screw should be screwed out all the way until looseOxygen and acetylene tanks should be upright and chained when transportedCaps should be screwed onUse only a spark lighter (torch lighter) to light a torchDo NOT use a cigarette lighter or matches to light a torch or check for leaks
6 Types of FlamesWhen first lit, the flame has excess acetylene and is carbonizing flameOxygen is added to produce a neutral flame used for heating, cutting, and weldingAdding extra oxygen makes an oxidizing flame which is the hottest flame used for special applications.