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Nitrogen - Oxygen-free (N2)
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Additional Info
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Features
- Odourless and colourless
- Non-toxic
- Does not support combustion
- An asphyxiant (does not support life)
- Non-reactive except at very high temperatures
- Does not react with oxygen at low temperatures
- Inert, dry and slightly soluble
- Available in 300-bar MCPs
Benefits
- Inert to nearly all substances at ambient temperatures and moderate conditions
- Nitrogen keeps laser-cut faces oxide-free due to the chemical inertness to react with the atmosphere
- At higher temperatures, nitrogen can react to form metal nitrides
- Nitrogen gas is only slightly soluble in a wide range of liquids and is therefore used to flush unwanted gases from solutions
- Reduces internal degradation of the rubber in tyres due to oxidisation
- As a cryogenic liquid, nitrogen can be used to thermally contract metals
Applications and Uses
- Used for blanketing and purging applications to displace or dilute all unwanted gas or vapour
- Widely used for reasons of safety and the prevention of product degradation in the chemicals and petroleum industry
- Inerting reactors and storage tanks
- Purging vessels and pipelines
- Sparging
- Pressure-transfer of liquids
- Shielding or assist gas for plasma-cutting aluminium and stainless steel, and as an assist gas for laser-cutting stainless steel TIG-welding of tough-pitch copper
- Heat-treatment processes to protect some of the most reactive metals
- In electrochemical analysis, can be bubbled through to displace any oxygen
- Pressure-transfer, where the movement of liquids or slurries from one piece of process plant to another is effected using gas pressure
- Tyre inflation: helps to extend tyre life and prevent tyre bursts
- Pressurising accumulators for batch-testing applications
- Can be used for shrink-fitting. The intense cold of liquid nitrogen (-196°C), reduces the physical dimensions of a component placed in the liquid. Once cooled, the component is connected to a mating component before swelling to its original size as it reaches room temperature, thereby securing itself in place
Material Compatibility
Nitrogen is non-corrosive, inert gas and is compatible with any common metals provided the equipment is designed to with stand the process pressure of a compressed gas cylinder. For more information on equipment please refer to the left hand navigation bar and click on equipment.
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