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CB / CB-UL, CBF / CBF-UL (E7) 07/2021 Page 16/197
Take appropriate measures to prevent oxygen enrichment and fire and explosion hazards in areas where
oxygen enrichment is possible.
General information for safe handling of oxygen:
• Make sure training of personnel on hazards of oxygen enrichmen
t and necessary safety
measures.
• Make sure adequate labeling of all oxygen equipment and facilities.
• Make
sure gas tightness of all gas connections by checking them for leaks (e.g. with leak
spray or diluted soap solution).
• Close the main valve of the source of oxygen after work when not using the chamber.
• Never lubricate O
2
equipment with oil or fat. Use only materials and spare parts which are
approved for use with oxygen.
• Regularly inspect fire extinguishers for proper condition.
• Set up emergency showers where oxygen enrichment is possible.
• Strictest smoking ban and no ignition sources in areas where oxygen enrichment is possible.
•
Make sure good ventilation of areas where oxygen enrichment is possible (location of the
chamber and/or O
2
cylinders.
• Persons who may have been in a possibly oxygen-enriched atmosphere must keep away
from ignition sources (flames, cigarettes, etc.) and ventilate their clothes at least 15 minutes.
• Always keep emergency routes free.
Chamber with O
2
control: Notes on handling nitrogen (N
2
)
Nitrogen (N
2
) in high concentrations is hazardous to health. It is colorless and almost odorless and therefore
practically imperceptible. Any N
2
gas that may escape must be safely led out via good room ventilation or
a suitable connection to an exhaust system.
DANGER
Risk of suffocation through high concentration of N
2
.
Death by suffocation.
∅ Do NOT set up chambers in non-ventilated recesses.
Ensure technical ventilation measures.
Observe the relevant regulations for handling N
2
.
Close the N
2
supply when decommissioning the chamber.
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