Dangers of Nitrogen

•Nitrogen is a colourless and odourless gas that can cause oxygen deficiency in confined spaces, and at exhaust openings on deck, during purging of tanks and void spaces.
•Nitrogen will displace Oxygen in high concentrations and create an Oxygen deficiency (<21%) without any physiological effects

•Breathing is stimulated and controlled by carbon dioxide (CO2) present in the lungs. As the CO2 level increases, the brain sends a message to increase respiration. When the CO2 level drops, the rate of respiration will also decrease in order to maintain the proper balance.

•Everyone should understand that one deep breath of 100% N2 will be fatal.
100% N2 will displace CO2 and O2 completely and, in the absence of a CO2 signal to the brain, the stimulus to breathe no longer exists.

In simple words:

•If someone breathes pure Nitrogen,
•He will not notice anything
•No coughing…
•No difficulty in breathing…
•Nitrogen cannot be detected by human senses
•After a few seconds he will die!!!!!