25 LTR

Nitrogen 5.0 grade is predominantly used for blanketing purposes.

For the purity 5.0 (>99.999%) the specification is: Oxygen < 5vpm and Moisture (H2) < 5vpm

For nitrogen the following is valid:

  • 1 nm3 = 1.147 kg
  • 1 kg = 0.872 nm3
  • 1 bar = 14.5 psi
  • 1 nm3 = 35.3 ft3
  • 1 kg = 2.2 lbs

The gas capacity of a cylinder can calculated in two different ways. The most simple method is the water capacity of the cylinder (in litres) multipled by the actual pressure (in bar); the result is the capacity in litres. Although a simple method it is not the most accurate method. A better but much more complex method will give a more accurate value for the gas capacity; it will take the compressability of the gas at both 1 bar and at the actual pressure in consideration and all based on 15 degrees C. The result is often quoted as normal litres or normal cubic metres (nm3). For nitrogen the more accurate method will give a slightly higher value as compared to the simple method i.e. (10.2 m3 versus 10 nm3).


  • Nitrogen is a colourless, odourless and tasteless.
  • Non-combustible and non-toxic.
  • Slightly lighter than air and it’s an inert gas.
  • The composition is: Nitrogen 5.0: >99.999%.
  • A certificate of analysis is supplied with the cylinder.
  • Nitrogen is well suited for purging or flushing cargo tanks and pipelines of residual gases and vapours prior to loading cargo.
  • It is also used as a ‘blanket’ on top of several types of cargoes to prevent reactions with oxygen from atmospheric air.
  • The filling pressure is lower in some locations than the normal 200 bar due to local rules and regulations that limit filling pressure.
  • Nitrogen 5.0 means > 99.999% pure and the impurities: Water (H2O) < 5 ppm and Oxygen (O2) < 5 ppm.


  • For your safety, the product is delivered in a Unitor cylinder complete with barcode and unique cylinder serial number
  • We trace and track all cylinders using the UniTrak system to give you peace of mind