2.9.1 Tanker transfer procedures should contain
information on the tanker's vapour collection system including:
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.1 a line diagram of the tanker's vapour collection
piping indicating the locations and purpose of all control and safety
devices;
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.2 the maximum allowable transfer rate as limited
by the venting capacity of the pressure or vacuum relief valves, or
any other factor which would limit the transfer rate;
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.3 the maximum pressure drop in the vessel's vapour
collection system for various transfer rates;
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.4 the relief settings of each pressure and vacuum
relief valve;
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.5 pre-transfer procedures; and
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.6 procedures to be followed in the event of a
fault during vapour collection operations.