Used in welding cutting and other fabrication works.

• Oxygen (O₂) – supports combustion, used in cutting/welding
• Acetylene (C₂H₂) – fuel gas for oxy-acetylene welding and cutting
• Argon (Ar) – inert gas for TIG welding, shielding
• Nitrogen (N₂) – inert gas used for purging, blanketing, and pressurizing
• Carbon Dioxide (CO₂) – used in MIG welding and fire extinguishers
• Hydrogen (H₂) – used in some welding processes and refining