Inert gas generator (IGG) refers to machinery on board marine product tankers. Inert gas generators consist distinctively of a burning and cooling chamber.
Atmospheric air is burned so that it contains less than 5% oxygen, thereby creating "inert gas". This gas is then delivered to cargo tanks to prevent explosion of flammable cargo.
This generator is sometimes confused with flue gas systems, which draw inert gas from the boiler systems of the ship. Flue gas systems do not have a burner but only "clean" and measure the air before delivering it to the cargo hold.
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