What pressure should a cutting torch be set at?
The gas pressures should be set at 3 to 5psi for Acetylene, and 20 to 30psi for the oxygen, but when you squeeze the oxygen lever after the initial flame adjustment of the preheat flames to neutral just to a point where the feather disappears,the oxygen cutting stream should be visible and at least 4 inches in length …
What is the ratio of oxygen and acetylene in gas cutting?
1.2:1
Natural Gas
| Table : Fuel Gas Characteristics | ||
| Fuel Gas | Maximum Flame Temperature °C | Oxygen to fuel gas Ratio (vol) |
|---|---|---|
| Acetylene | 3,160 | 1.2:1 |
| Propane | 2,828 | 4.3:1 |
| MAPP | 2,976 | 3.3:1 |
How do you use a Harris torch?
Using the Torch Turn the acetylene valve anywhere from 1/8 to 1/4 when activating it. Then, light the torch using the striker. Ignite the acetylene torch before turning on the oxygen. Adjust the acetylene to get rid of the black smoke.
Why does my cutting torch keep popping?
The reason that an oxyacetylene cutting torch will pop and go out is because of a problem with gas flow. Usually this is either an issue with flow settings, a leak or blockage.
What is the normal working pressure for acetylene?
15 psig
Under no condition shall acetylene be generated, piped (except in approved cylinder manifolds) or utilized at a pressure in excess of 15 psig (103 kPa gauge pressure) or 30 psia (206 kPa absolute).
What do you turn off first oxygen or acetylene?
We recommend closing the oxygen valve first whenever turning off an oxy-fuel torch system especially when Acetylene is fuel.
Why LPG should not be used for gas cutting?
Propane do not have a reducing zone like acetylene and can hence not be used for Gas Welding. Propane can like acetylene be used for cutting. Propane releases only a small proportion of heat in the inner flame cone (less than 10%), so most of the heat in the flame is located in the outer cone.
Do you turn on the oxygen or acetylene first?
How do you fix a cutting torch?
Check the torch tip for clogged ports. Brush the torch tip thoroughly with a wire brush to remove any debris or metal particles. If the torch tip is warped or flattened on the end, replace with a new tip. Clean the inside of the torch tip port holes with a torch tip cleaning tool.