Oxy – Fuel Torch Ag Mechanics

Equipment: Oxygen Cylinder Acetylene Cylinder Pressure Regulators Oxy-Acetylene hoses Torch Body with Cutting attachment Correct Tip

Equipment Cont.. Cutting Goggles Safety Glasses Striker Check Valves or Flashback Arrestors. Proper Clothing

Oxy-Acetylene Hoses. COLOR CODED: Red= Acetylene (Flammable) Green = Oxygen

Oxygen Oxygen- a colorless, odorless, tasteless gas that is heavier than air. Oxygen alone will not burn, but when mixed with other combustibles it becomes highly explosive.

Oxygen is stored as a compressed gas in a steel cylinder to a pressure of 1,800 to 2,200p.s.i. Turn Cylinder valve open completely

Oxygen Regulator Right Handed Threads Regulator has Female Connection, Cylinder has Male Connection Working pressure between 20 and 60 psi We (Ag mech) will use 20 psi

Acetylene Acetylene- is colorless, but has a very distinct odor. This gas is compressed to a pressure of 250 p.s.i. It is composed of carbon and hydrogen. Turn Cylinder Valve 1/3 or 1/4 turn open.

Acetylene Regulator Left Handed Threads Regulator has Male Connection with “V” groove, Cylinder has female Connection. Acetone is added as a Catalyst. Working pressure between 2 and 10 psi Tank pressure, 250 psi We use 5 psi

Oxygen & Acetylene Cutting Is a process used to separate metal by heating it to a melting point, somewhere between 1,400 and 1,800 degrees The metal is then oxidized and blown from the kerf with a stream of pure oxygen

Oxygen Acetylene Safety Oxygen supports combustion Cylinders are necessary but can also be highly dangerous Always cap bottles in transport Cylinders can explode

Oxygen Acetylene Safety Cont.. 5. Acetylene bottle should be emptied at a rate of 1/7th capacity per hour or less 6. Flames can reach 6,300 degrees F 7. Bottles should be stored in a vertical position at all times.

Cutting Tips Tips are sized by metal thickness Adjust pressure to fit metal Cone of flame does not touch metal Popping tip means: too close, not enough oxygen, too hot, or dirty tip

Three Types Of Flames

Carburizing Flame Excess acetylene Lack of oxygen Used for soldering & hardsurfacing                                                

Neutral Flame Correct oxygen Correct acetylene Used for cutting, welding & heating                                                

Oxidizing Flame Excess oxygen Lack of acetylene Used for brazing Usually has a whistling sound