Tankerman · Inert Gas — Nitrogen vs Flue Gas
Compared with flue-gas inert gas systems, nitrogen used as inert gas on product/chemical and gas carriers has the advantage of:
- AVery low oxygen and no soot/SOx, giving a cleaner, drier atmosphere suitable for sensitive cargoes✓ Correct
- BAdding oxygen to the tank
- CBeing flammable itself
- DRaising the tank oxygen above 21%
Explanation
Nitrogen (from an onboard generator or shore) provides a clean, dry inert atmosphere with essentially no oxygen and none of the soot, sulfur, or moisture of boiler flue gas. It is preferred where cargo purity matters (chemicals, some gases), though it still creates an oxygen-deficient, lethal enclosed-space atmosphere.
Authority: ISGOTT; IGC/IBC operations
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