12.2.2 Toxicity of hydrocarbon vapours
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12.2.2 Toxicity of hydrocarbon vapours

 Inert gas does not affect the toxicity of hydrocarbon gases and the problem of toxicity is no different from that of ships without an inert gas system. Because of possible gas pockets, regeneration, etc. gas-freeing must continue until the entire compartment shows a zero reading with a reliable combustible gas indicator or equivalent, or a 1% of the lower flammable limit reading should the instrument have a sensitivity scale on which a zero reading is not obtainable.

Parent topic: 12.2 Health hazards
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