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You know the old expression, “what goes in must come out”.
It applies to the tankers too, not literally though.
During loading of cargo on oil tankers, when the cargo enters a cargo tank, it replaces the air (Or inert gas) inside the tank.
Simple physics right ?
This air (or inert gas) must be allowed to come out of the tank so that the pressure inside the cargo tank is within limits.
Same goes during the unloading of the cargo on tankers. As the cargo is removed from the cargo tank, the void created must be replaced by air or inert gas.
The arrangements and system provided on tankers for allowing this air to come out of the cargo tank is called venting system.
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About Capt Rajeev Jassal
Capt. Rajeev Jassal has sailed for over 24 years mainly on crude oil, product and chemical tankers. He holds MBA in shipping & Logistics degree from London. He has done extensive research on quantitatively measuring Safety culture onboard and safety climate ashore which he believes is the most important element for safer shipping.
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