3.8 Inert gas distribution system
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3.8 Inert gas distribution system

  3.8.1 The inert gas distribution system, together with the cargo tank venting system, where applicable, has to provide:

  • .1 means of delivering inert gas to the cargo tanks during discharge, deballasting and tank cleaning operations, and for topping up the pressure of gas in the tank;

  • .2 means of venting tank gases to atmosphere during cargo loading and ballasting;

  • .3 additional inlet or outlet points for inerting, purging and gas-freeing;

  • .4 means of isolating individual tanks from the inert gas main for gas-freeing (see 3.12.4);

  • .5 means of protecting tanks from excessive pressure or vacuum.

  3.8.2 A large variety of designs and operational procedures may be used to meet these interrelated requirements. In 3.9 are considered some of the major design options and their more important operational consequences; further advice on operational precautions is given in section 5.

Parent topic: 3 Function and Design Considerations
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