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Features of Nitrogen Gas
- Odourless and colourless
- 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
- 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
- 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.
Nitrogen is a 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 Speciality Equipment section.
The new GENIE® cylinder from BOC
Nitrogen is now available in the new GENIE® cylinder from BOC.
Available in 10L or 20L, GENIE® contains 30% more gas than a standard steel cylinder and it uses digital display technology to tell you how much gas it contains. With attachable wheels, it is more portable.