Pressurization 2
Pressurization 2 : A method of keeping escape routes in high-rise buildings clear of smoke by increasing the air pressure in staircases and lobbies. Of ship cargo tanks. It is not always possible to empty a tank if a high vapour petroleum is being unloaded. If an inert gas system is installed in the tank this gas can be employed as the pressurizing agent to improve such conditions. Sometimes steam or air (supplied by compressors or low pressure fans) may be used
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