TIG (Tungsten Inert Gas) welding produces high-quality welds on stainless steel, aluminium, and thin-gauge materials. It uses a non-consumable tungsten electrode and inert shielding gas, generating intense UV radiation and producing ozone and nitrogen dioxide fumes. TIG welding requires a high level of skill and awareness of the specific hazards involved. This talk covers the safety requirements for TIG welding on UK construction sites.
Key Hazards
Intense UV radiation causing arc eye and severe skin burns
Ozone and nitrogen dioxide fume inhalation from the welding arc
Electric shock from the high-frequency arc start function
Burns from the hot tungsten electrode and heated workpiece
Control Measures
Use a welding helmet with shade 10-14 lens appropriate for the amperage and base material.
Wear flame-resistant clothing covering all exposed skin including neck and wrist areas.
Ensure adequate fume extraction using LEV positioned close to the weld zone.
Check the high-frequency unit earthing and insulation before starting any TIG welding.
Use insulating matting beneath the welder when working on conductive floors or structures.
Ensure the shielding gas supply is adequate and the flow rate matches the joint configuration.
Erect welding screens to protect nearby workers from UV exposure and arc flash.
Allow the tungsten electrode and workpiece to cool before handling after welding.
Brief nearby operatives on the TIG welding activity and the need to avoid looking at the arc.
Remember
Use the correct shade lens for the amperage and never weld without full UV protection
Ensure fume extraction is positioned close to the weld zone for effective capture
Check the high-frequency arc start unit earthing and insulation before each session
Erect welding screens to protect all nearby workers from ultraviolet radiation
Allow the electrode and workpiece to cool fully before handling after welding
Applicable Legislation: COSHH 2002 · Electricity at Work Regulations 1989 · PUWER 1998 · EH40 Workplace Exposure Limits