Welding Gases in the Tablelands

Shielding gases protect the weld pool from atmospheric contamination during welding. Without shielding, oxygen, nitrogen and water vapour in the air can cause porosity, spatter, and poor weld quality. In processes like MIG and TIG welding, shielding gases stabilise the arc and improve weld appearance, strength and penetration. They also reduce oxidation, which can weaken the weld and lead to long-term structural issues. The choice of shielding gas affects arc characteristics, bead profile and metal transfer. By creating a clean, stable environment, shielding gases help produce strong, consistent and visually clean welds across a range of materials.

Selecting the correct welding gas depends on several factors: the welding process (MIG, TIG, oxy-acetylene, etc.), the type of metal, the desired weld characteristics and cost considerations. For example, pure argon is preferred for TIG welding aluminium and stainless steel, while a mix of argon and CO₂ is common for MIG welding mild steel. Projects needing deep penetration might benefit from higher CO₂ content, while those requiring a clean finish may favour helium-argon blends. Your supplier or welding technician can recommend a gas based on your specific application to ensure safety, efficiency and optimal results.

Welding gases can be hazardous if not stored and handled properly. Cylinders must be stored upright in a secure, well-ventilated area away from heat, flames or combustible materials. Each gas has specific risks — acetylene is highly flammable, oxygen supports combustion, and compressed gases can explode if damaged. Always use regulators rated for the gas type, check for leaks, and avoid dropping or striking cylinders. Staff should be trained in correct handling procedures and emergency protocols. Regular inspections and servicing of hoses and fittings are essential. When safety guidelines are followed, welding gases can be stored and used reliably with minimal risk.