5.10 Purging prior to gas-freeing
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Statutory Documents - IMO Publications and Documents - Specifications and Manuals - Inert Gas Systems - 5 Application to Cargo Tank Operation - 5.10 Purging prior to gas-freeing

5.10 Purging prior to gas-freeing

 When it is desired to gas-free a tank after washing, the concentration of hydrocarbon vapour should be reduced by purging the inerted cargo tank with inert gas. Purge pipes/vents should be opened to atmosphere and inert gas introduced into the tank until the hydrocarbon vapour concentration measured in the efflux gas has been reduced to 2% by volume and until such time as determined by previous tests on cargo tanks has elapsed to ensure that readings have stabilized and the efflux gas is representative of the atmosphere within the tank.

Parent topic: 5 Application to Cargo Tank Operation
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