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Appendix 6: Liquefied Gases

Handling Liquified Gases

Liquefied gases (e.g., nitrogen or helium) can cause damage to eyes and skin. When handling them, protective clothing must be worn: this should include eye protection in the form of goggles or full-face screen, and dry non-absorbent gloves (preferably leather). Always pour slowly to avoid spilling and splashing.

Accidental Decanting

In the event of accidental emptying of a storage vessel into the room, there is a risk of asphyxiation due to displacement of oxygen. The smallest possible size of storage vessel should be used. If the size is such that serious depletion should occur, the room should be equipped with an oxygen monitor. (The ratio of liquid to gas volume is approximately 700:1.) Occupants of such rooms must be instructed in the correct procedure in the event of a major spill.

Instructions for use of Liquefied Gas Storage Vessels

  • Always follow operating instructions
  • Only allow authorised persons to operate the vessel
  • Keep vessel upright at all times (except when pouring from vessels designed for this purpose)
  • Handle with care - rough handling can cause serious damage to the vessel
  • Do not 'walk', roll, or drag vessels
  • Do not allow contact with corrosive chemicals
  • Do not attempt to lift or move large or heavy vessels without assistance

First Aid Treatment of Cold Burns

  • Loosen any restrictive clothing
  • Flush the affected area with copious quantities of cold water
  • Protect frozen parts with bulky sterile dressings - do not apply so tightly as to restrict blood circulation
  • Advise ambulance crew of details of the accident and first aid treatment already administered
  • Avoid smoking and alcohol consumption, as these may reduce blood supply to the affected part

Any queries or problems should be referred Mr M. Walker.