Health and Safety Manual Section C3 Cryogens

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Health and Safety Manual Section C3 Cryogens
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Cryogens

• Fluids which at ambient temperature cannot be
  liquefied solely by pressure
• Include liquid oxygen, nitrogen, argon, hydrogen
  and helium solid carbon dioxide

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Hazards

• Oxygen deficiency - lt 19.5
• Oxygen enrichment - gt 22
• Cold liquid
• Over-pressurisation in closed containers
• Manual handling

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Standards

• Risk assessment needed, covering
• Handling of cryogens
• Filling of cryogens into containers
• Transportation esp. in vehicles and where lifts
  and staircases are involved
• Storage and use in confined spaces and other
  areas with little or no ventilation

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Risk Controls

• Oxygen monitor, set at 19.5 / 22
• Sufficiently large room
• Adequate ventilation
• Rescue and first aid provision
• Presence of at least two people

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Risk Controls

• Regular checks to ensure container venting
  mechanisms work effectively
• Never travelling in lifts with cryogens
• Suitable equipment
• PPE
• Training inc. manual handling