Air Products Gasguard 250, Руководство по установке

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Gasguard
®
250 VMB System Installation Manual
Air Products and Chemicals, Inc. Page 1 - 4
Oxygen concentrations of 19.5% or less can greatly increase the hazard of
asphyxiation to personnel. Before working in an area where nitrogen, helium or
other inert gases could be present, check the area with an oxygen monitor to be
sure the oxygen concentration is between 19.5% and 23%. While working in the
area, the oxygen concentration needs to be monitored with a continuous oxygen
monitor. Always provide adequate ventilation in the work area to decrease the risk
of an oxygen deficient atmosphere.
Personnel in an oxygen deficient atmosphere will not realize they are being
asphyxiated. Breathing of pure inert gases will cause immediate unconsciousness.
Symptoms of asphyxia include:
•
Rapid breathing
•
Nausea
•
Vomiting
•
Inability to move
•
Convulsive movements
•
Collapse
•
Abnormal pulse
•
Rapid fatigue
•
Faulty judgment
•
Insensitivity to pain
• Abnormal emotions
Remove any personnel in an oxygen deficient atmosphere to fresh air. Get
medical attention immediately. Positive pressure breathing apparatus must be
worn by any rescuers entering a suspected oxygen deficient atmosphere.
Nitrogen gas may accumulate in low or confined areas. All requirements of
OSHA 1910.146 (Confined Space Guidelines) must be met when inert gases may
be present in confined spaces. Self contained breathing apparatus is required
(cartridge or filter type gas masks cannot be used). See the information on
personal protective equipment in this section for details.
When entering a confined area or area which may contain high inert gas
concentrations, a
"Buddy System" must be used. One person should remain