WELDING - as a shielding gas ensures inert conditions for welding .
PURGING and PRESSURIZING - for cryogenic installations .
LEAK DETECTION - in high-vacuum or high-pressure equipment where tightness is crucial for safety reasons or long lifetime requirements.
BREATHING MIXTURES - for deep sea diving or medical therapies.
GAS CHROMATOGRAPHY - as a carrier gas for it's low solubility, inertness and high thermal conductivity.
BALLOON and AIRSHIP INFLATION .