4.2
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Specifications and Manuals - Inert Gas Systems - 4 Operation of Inert Gas Plant - 4.2

4.2

 Start-up procedures should be as follows:

  • .1 Ensure boiler is producing flue gas with an oxygen content of 5% by volume or less (for existing ships 8% by volume or, wherever practicable, less).

  • .2 Ensure that power is available for all control, alarm and automatic shutdown operations.

  • .3 Ensure that the quantity of water required by the scrubber and deck water seal is being maintained satisfactorily by the pumps selected for this duty.

  • .4 Test operation of the alarm and shutdown features of the system dependent upon the throughput of water in the scrubber and deck seal.

  • .5 Check that the gas-freeing fresh air inlet valves, where fitted, are shut and the blanks in position are secure.

  • .6 Shut off the air to any air sealing arrangements for the flue gas isolating valve.

  • .7 Open the flue gas isolating valve.

  • .8 Open the selected blower suction valve. Ensure that the other blower suction and discharge valves are shut unless it is intended to use both blowers simultaneously.

  • .9 Start the blower.

  • .10 Test blower “failure” alarm.

  • .11 Open the blower discharge valve.

  • .12 Open the recirculating valve to enable plant to stabilize.

  • .13 Open the flue gas regulating valve.

  • .14 Check that oxygen content is 5% by volume or less, (for existing ships 8% by volume or, wherever practicable, less) then close the vent to atmosphere between the gas pressure regulating valve and the deck isolating valve.

    Note: Some oxygen analysers require as much as two hours to stabilize before accurate readings can be obtained.

  • .15 The inert gas system is now ready to deliver gas to the cargo tanks.


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