5.4 Loaded condition
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Specifications and Manuals - Inert Gas Systems - 5 Application to Cargo Tank Operation - 5.4 Loaded condition

5.4 Loaded condition

  5.4.1 During the loaded passage a positive pressure of inert gas of at least 100 mm water gauge should be maintained in the cargo tanks and topping up of the pressure may be necessary. When topping up the inert gas pressure in the cargo tanks, particular attention should be paid to obtaining an oxygen concentration of 5% or less in the inert gas supply before introducing the gas into the cargo tanks.

  5.4.2 On motor tankers, the boiler loading may have to be increased in order that the low oxygen concentration in the inert gas supply can be achieved. It may also be necessary to restrict the output of the inert gas blowers to prevent air being drawn down the uptake during the topping up operation. If by these means inert gas of the quality defined in 5.4.1 cannot be achieved then inert gas from an alternative source of supply such as an inert gas generator might be used.


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