Natural gas can be used as an alternative fuel for OFC.

• A. False
• B. True
• C. Not specified
• D. Only for small jobs

Answer: (B)

In oxy-fuel cutting, the flame fuel can be varied, and natural gas is one of the viable options you can use as an alternative to acetylene or propane. This is possible because natural gas, when mixed with oxygen, provides enough heat to heat the metal to its kindling temperature and sustain the cutting reaction. However, because natural gas produces a lower flame temperature than acetylene, you’ll typically see slower cutting speeds and it’s often more suitable for thinner materials or lighter cutting tasks. To make it work reliably, the torch and tips must be compatible with natural gas, and you may need to adjust gas pressures and nozzle sizes to achieve the right preheat and flame characteristics. Safety and ventilation remain important, too, since any fuel gas requires proper handling and leak protection. Overall, the statement is true because natural gas can be used as an alternative fuel for oxy-fuel cutting with the appropriate equipment and adjustments.