Dominion Gas, A Praxair Company

Dominion Gas supplies a number of liquid gases. The following products are classed as "bulk gases" and are distributed and stored in cryogenic tanks.

Liquid Argon, Liquid Nitrogen, Liquid Oxygen (LAR, LIN, LOX) 

Atmospheric gases produced by air separation process.


Argon (Ar)

Monatomic, chemically inert gas comprising slightly less than 1% of atmospheric Air. Liquid argon is stored at approx -186°C, argon is used primarily as an inert gas for welding etc.


Nitrogen (N2)

Chemically inert gas comprising slightly more than 78% of atmospheric air. Liquid nitrogen is stored at approx -195°C, nitrogen is used mainly for blanketing and inerting.


Oxygen (O2)

Oxidiser, comprising slightly less than 21% of atmospheric air. Liquid oxygen is stored at approx -183°C, oxygen is used for medical and breathing gases as well as in the production of fuels and chemicals.


Carbon Dioxide (CO2)

Non-flammable gas and found in atmospheric air at concentrations of 0.03%. CO2 is obtained as a by-product of various manufacturing processes eg fertiliser manufacture. Carbon dioxide may exist simultaneously as a solid, liquid and gas at a temperature of -56.6°C and a pressure of 4.16bar. Although not truly an inert, CO2 is non reactive with many materials and is used for blanketing and purging tanks. It is also used as a shielding gas in arc welding and is the source of the bubbles in carbonated drinks.