8.3
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Statutory Documents - IMO Publications and Documents - Specifications and Manuals - Inert Gas Systems - 8 Emergency Procedures - 8.3

8.3

 In the case of product carriers, if it is considered to be totally impracticable to effect a repair to enable the inert gas system to deliver the required quality and quantity of gas and maintain a positive pressure in the cargo tanks, cargo discharge and deballasting may only be resumed provided that either an external supply of inert gas is connected to the system through the arrangements required by regulation 62.11.5, or the following precautions are taken:

  • .1 In the case of tankers built on or after 1 September 1984, the venting system is checked to ensure that approved devices to prevent the passage of flame into cargo tanks are fitted and that these devices are in a satisfactory condition.

  • .2 In the case of tankers built before 1 September 1984 the flame screens are checked to ensure that they are in a satisfactory condition.

  • .3 The valves on the vent mast risers are opened.

  • .4 No free fall of water or slops is permitted.

  • .5 No dipping, ullaging, sampling or other equipment should be introduced into the tank unless essential for the safety of the operation. If it is necessary for such equipment to be introduced into the tank, this should be done only after at least 30 minutes have elapsed since the injection of inert gas ceased. All metal components of equipment to be introduced into the tank should be securely earthed. This restriction should be applied until a period of five hours has elapsed since injection of inert gas has ceased.

Parent topic: 8 Emergency Procedures
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