What is VEC or Vapour Emission Control and its hazards ?

  • Operations are to be terminated if the oxygen content of the vapour stream exceeds 7% by volume. Operations are not to be resumed until the oxygen content in the receiving ship has been reduced below 7% by volume.
  • There is to be frequent monitoring of both ship’s IG pressures with cross comparison on a regular basis and at least hourly. Transfer volumes are to be compared on the same basis.
  • No air is permitted to enter the tanks of the discharging ship at any time.

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