Oxyacetylene Torch Settings Chart and Guide

As a welder, working with an oxyacetylene torch can be a great idea. But before you can get the desired results, it would help if you used this tool with the right settings. Although getting these settings might look tricky, a chart and guide can make the task easier.

Would like to use an oxyacetylene torch for your current welding project? If yes, then you should go through this article and find a chart and guide that helps you adjust the tool correctly.

oxyacetylene torch settings

Oxyacetylene Torch Settings Chart and Guide 

Here is a chart showing the ideal settings for using an oxyacetylene torch.

Thickness of Metal ¼ ½ ¾ 1 2
Cutting Tip Size 000 00 0 0 1 2 3
Pressure of Acetylene  3-5 3-5 3-5 3-5 3-5 3-6 4-8
Pressure of Oxygen  20-25 20 -25 25-35 30-35 30-35 35-40 40-45

If you want to adjust an oxyacetylene torch, you will have to consider the thickness of your target material. For instance, ⅜” metal requires a cutting tip of 0, acetylene pressure of 3 – 5, and oxygen pressure of 25 – 35.

But if you are working with ⅛ metal, you should consider a cutting tip of 000 and oxygen pressure of 20 – 25 while the acetylene remains at 3 – 5. 

What Do You Turn On First Oxygen or Acetylene?

As you set your oxyacetylene torch, you should first turn on the acetylene, light up the flame, and make it as low as possible. Then turn on the oxygen and set it for your welding or cutting task. 

What Causes Oxyacetylene to Explode?

A container of oxyacetylene can explode for many reasons such as heat, vibrations, or even flashbacks. Besides, an explosion can also occur if the acetylene also decomposes. 

What You Should Never Do While Working with Oxygen and Acetylene?

If you are welding with an oxyacetylene torch, do not store both gases close to each other. Also avoid smoking, setting the acetylene over 15 psi, using matches to light the torch, working with oily or greasy tools, and keeping the flame from the cylinder. 

Which Metal Should Be Avoided When Using Oxyacetylene?

Several metals cannot be used with an oxyacetylene torch. These metals include mercury, copper, and silver. 

What Happens if You Turn Off Oxygen Before Acetylene?

Turning oxygen off before acetylene can help the system free from carbon deposits that might affect the system. Besides, the same procedure also allows the operator to detect any possible leaks from the oxygen or acetylene valve. 

What PSI Should a Torch Never Go Above on Acetylene?

As you work with an oxyacetylene torch, make sure the acetylene PSI stays lower than 15. If you exceed this setting, the gas might become unstable and explode. 

What Should Acetylene Pressure Be to Light a Torch?

According to safety standards, the acetylene pressure for an oxyacetylene torch should not exceed 15 psi. If the operator chooses a higher value, then there might be a gas explosion. 

Can Acetylene  Burn Without Oxygen?

Yes, a sample of acetylene can burn without the presence of oxygen. After all, the decomposition of the gas produces a large amount of heat thereby allowing the gas to burn properly. 

Oxy Acetylene Torch Settings for Brazing Copper

Would you like to use your cutting torch to work on copper with a light thickness? If yes, then set the oxygen pressure at 7 – 10 psi while the acetylene should stay between 5 to 7 psi. But if you are working with a heavier sample of the metal, cut it with an oxygen pressure of 20 – 50 psi and an acetylene pressure of 5 psi. 

What is the Maximum PSI Before Acetylene Becomes Unstable?

Before a sample of acetylene becomes unstable, the PSI should reach above 25 psi. At this stage, the gas can be explosive, especially when heated or mixed with air. 

What is the Safe Distance between Oxygen and Acetylene?

As mentioned earlier, a cylinder of oxygen should not be placed close to a cylinder of acetylene. For safety reasons, the ideal distance between both items should be at least 20 feet. 

Why Is It Important to Crack the Oxygen Cylinder Before Use? 

Before using a cylinder of oxygen, it is advised that you crack the cylinder to remove any dirt that might block the valve. To crack the container, you will have to release a small amount of gas into the air. 

Why Should Oxygen Be Turned Off When Not in Use?

After working with oxygen, make sure the gas is turned off. When it comes down to it, the gas can cover various items within its environment and make them flammable. 

How Long Should You Allow Acetylene to Stand Up Before Using?

Before starting your welding or cutting project, allow the acetylene to stand for at least 30 minutes. During the period, place the cylinders in a vertical position.