Liquid Nitrogen, LN2 gas-supplied by DSW
Liquid nitrogen is produced at air separation plants that liquefy and distill air into its constituent parts: nitrogen, oxygen, and argon.
Cryogenic tankers deliver this molten substance directly to our customers for high-volume customer applications.
Refrigerated liquefied gas
Boiling point -196°C
Gas/vapor heavier than air
Odourless, colorless and non-toxic
Chemically inert at ambient temperatures
Argon is included in the nitrogen
Application and use
In its liquid form, nitrogen is used as a cryogen for many applications where very low temperatures or rapid temperature reduction is required.
The inert property of gaseous nitrogen enables it to be used for applications where a substance needs to be protected from oxidation or combustion by atmospheric air or from contamination by moisture.
Some typical applications where nitrogen is used are:
Artificial Insemination Nitrogen is often used to store semen samples for artificial insemination of cattle.
Blanketing and inerting Nitrogen maintains a dry, inert atmosphere over chemicals during storage, reaction, or processing.
Controlled atmospheres The atmosphere and ambient temperature surrounding naturally respiring products such as fruit are actively managed to provide optimum conditions for long-term storage.
Electronics Used in the inerting of printed circuit board reflow and wave ovens to prevent oxidation and facilitate the use of weaker fluxes, which decompose more easily without leaving a residue
Food freezing/chilling Liquid nitrogen freezes food quickly, producing a higher-quality product than conventional refrigeration.
Food inerting is Used in brewing, soft drinks, and wine-making industries to exclude air from the product and degrade water.
Food packaging Used in modified atmosphere packaging, liquid nitrogen can increase the shelf-life without vacuum-packing, artificial preservatives, or freezing.
In freeze-drying, materials dissolved in water or organic solvents are frozen into particles or droplets. A vacuum and a controlled amount of heat are applied to the freezing chamber to reduce moisture by sublimation.
Nitrogen and hydrogen are used in the float glass process to manufacture flat glass. In this process, a perfectly balanced drink with very high quality is achieved by floating liquid glass on a bath of molten tin.
Heat treatment: Pure nitrogen protects some of the most reactive metals during heat treatment. These metals readily form a protective oxide surface layer from the small amount of oxygen in the nitrogen and need no further protection.
Lasers Nitrogen is an assist gas for laser cutting stainless steel, aluminum, and non-metallic materials.
Metals Nitrogen is used in iron and steelworks applications for degassing and metal-stirring, purging, cooling, slag splashing, gas knives, and as a carrier gas for injecting de-sulphurising compounds. It is also used for aluminium-extrusion inerting.
Pipe-freezing Repairs can be made to a pipe containing a liquid by using liquid nitrogen to freeze a fluid plug on each side of the section of the line to be opened.
Purging Applications include inerting reactors and storage tanks, purging vessels and pipelines of flammable or toxic gases and vapors, and liquids’ sparging and pressure transfer.
Shrink-fitting Liquid nitrogen is used to shrink components so they are small enough to be inserted into another element.
Sample storage: Liquid Nitrogen can be used to store medical or research samples such as blood, plasma, and semen – safely.
Liquid Nitrogen Supply Model
Liquid phase nitrogen can be supplied in pre-filled liquid cylinders and refillable Dewars.
For larger supply requirements, liquid nitrogen can be delivered to small onsite cryogenic vessels (MicroBulk) or large-scale cryogenic vessels (bulk tanks).