Liquid Nitrogen

Liquid nitrogen is produced in large quantities at air separation plants which liquefy and distil air into its constituent parts: nitrogen, oxygen and argon

Features
  •     Refrigerated liquefied gas
  •     Boiling point -196°C
  •     Gas/vapour heavier than air
  •     Odourless, colourless and non toxic
  •     Chemically inert at ambient temperatures
Specification
  •     Nitrogen 99.999%
  •     Oxygen <5vpm
  •     Moisture <2vpm
  •     Argon is included in the nitrogen

It is delivered to our customers by cryogenic tankers, into onsite storage, for use in high-volume customer applications.
It is stored as a cryogenic liquid in a vacuum-insulated vessel which can provide several days' supply and be used on demand as either a liquid or gas.

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Common applications

  • Artificial Insemination
    Nitrogen is often used for the storage of semen samples for artificial insemination of cattle
  • Blanketing and inerting 
    Nitrogen is used to maintain 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 is actively controlled 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 compared to to conventional refrigeration
  • Food inerting 
    Used in brewing, soft drinks and wine-making industries to exclude air from the product and de-aerate water
  • Food packaging
    Used in modified atmosphere packaging, liquid nitrogen can increase the shelf-life without the need for vacuum-packing, artificial preservatives or freezing
  • Freeze-drying
    In the freeze-drying process, materials dissolved in water or organic solvents are frozen into particles or droplets. A vacuum is applied to the freezing chamber along with a controlled amount of heat sufficient to drive off moisture by sublimation

  • Glass 
    Nitrogen and hydrogen are used in the float glass process for manufacturing flat glass. In this process perfectly flat glass with a very high quality is achieved by floating liquid glass on a bath of molten tin
  • Heat treatment
    Pure nitrogen is used to protect 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 used as an assist gas for laser cutting of stainless steel, aluminium 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 plug of liquid on each side of the section of pipe to be opened
  • Purging
    Applications include inerting reactors and storage tanks, purging vessels and pipelines of flammable or toxic gases and vapours, and the sparging and pressure transfer of liquids
  • Shrink-fitting 
    Liquid nitrogen is used to shrink components so they are small enough to be inserted into another component
  • Sample storage 
    Liquid Nitrogen can be used to store medical or research samples such as blood, plasma and semen – safely

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