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The effect of oxygen-deficient and oxygen-enriched atmospheres
The concentration
of oxygen(%)
Symptoms (atmospheric pressure)
Deadly, 6 minutes(Absolutely airtight environment,
such as hyperbaric oxygen chamber
Deadly, can be cured after 45 minutes treatment.
(Absolutely airtight environment, such as hyperbaric
oxygen chamber)
8 minutes, blood pressure, weak heartbeat,
mouth breathing, quickly stopped breathing
Rich oxygen
Normal
Minimum
Reduce efficiency, and lead to problems of head,
lung and circulation system
Shortness of breath, loss of judgment, purple lips
governance loss, syncope, unconscious, pale,
nausea and vomiting
40 seconds, convulsions, respiratory arrest, death
Headache, nausea within 20 minutes ,death within
1 hour
Harm of carbon monoxide
Content of carbon
monoxide in Air
Suction time and showed symptoms of poisoning
Maximum
2~3 hours , a slight headache, dizziness, nausea
2hours, forehead pain, life risk after 3hours
Headache, nausea within 45minutes,death within
2~3hours
The above parameters are for reference only
-20-
The above parameters are for reference only
Commonly used flammable gas explosion limit Table
Name
Chemical
formula
The explosion limit in air (V%)
Upper limit LEL
Lower limit LEL
Methane
Ethane
Propane
Butane
Gasoline(Liquid)
Kerosene(Liquid)
City gas
liquefied
petroleum gas
Turpentine(Liquid)
Olfactory sensation
The concentration of Hydrogen and symptoms of poisoning
Range
Unit: ppm
Unit: mg/m3
mmediately die
Death within 2~15 minutes
Seriously poisoned within 1minute,death
within 0.5~4 hours
Seriously poisoned within 0.5~1hour,death
within 1~4 hours
Poisoning in 6~8 minutes,death within 4~8 hours
Can afford 0.5~1 hour, but sequela
Olfactory nerve paralysis,obvious poisoning
symptoms
Slight symptoms of poisoning within 1~2 hours
Symptoms of poisoning
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