Safety and occupational health instructions
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• Ventilate the rooms affected sufficiently.
• Investigate the cause of the accident.
This list is not complete.
2.6 Oxygen enrichment
2.6.1 Dangers
Oxygen enrichment may increase the danger of explosion and fire.
2.6.2 Causes
Oxygen may be condensed from the air if liquid nitrogen is used and similarly be liquefied
because the boiling point of oxygen (approx. -183° C) is above that of nitrogen (-196° C).
2.6.3 Recommendations
The following points must be considered in the case of oxygen enrichment:
• Do not smoke.
• Where possible, keep easily inflammable materials away from the vessel.
•
Remove all sources of fire (naked flame and light, spark producers, matches,
lighters etc.).
• Ventilate installation rooms constantly and appropriately.
• Clean floor regularly.
• Train personnel.
• Wear personal protective equipment.
• Check oxygen content constantly.
• Always carry an oxygen metre.
This list is not complete
2.7 Surrounding area of the machine
2.7.1 Rooms
The room in which the machine is located must:
• permit operation without danger to the employees
• have a constantly running and appropriate ventilation system
•
have a level and non-porous floor that is also able to bear the load of the
vessel
•
have safety datasheets on liquid nitrogen visible for all to see
• prevent unauthorised access
• permit the safe filling of the vessel
•
permit accessibility to the vessel for inspection, cleaning and maintenance
This list is not complete.
