Which gases are used by a welder for cutting steel pipe?

Which gases are used by a welder for cutting steel pipe?

• A. Oxygen & Acetylene
• B. Nitrogen & Argon
• C. Oxygen & Propane
• D. Helium & Nitrogen

Answer: (A)

Oxy-fuel cutting relies on using a fuel gas to provide the heat and pure oxygen to oxidize the metal. Acetylene is a common fuel because it produces a very hot flame, which together with oxygen creates the high-temperature, oxidizing environment needed to burn steel and create a clean cut. Nitrogen, argon, and helium are inert or shielding gases used in welding processes, not for cutting. Propane can be used in some oxy-fuel setups, but acetylene is the typical choice for cutting steel pipe due to its higher flame temperature and efficiency.

Oxy-fuel cutting relies on using a fuel gas to provide the heat and pure oxygen to oxidize the metal. Acetylene is a common fuel because it produces a very hot flame, which together with oxygen creates the high-temperature, oxidizing environment needed to burn steel and create a clean cut. Nitrogen, argon, and helium are inert or shielding gases used in welding processes, not for cutting. Propane can be used in some oxy-fuel setups, but acetylene is the typical choice for cutting steel pipe due to its higher flame temperature and efficiency.