Prigorodnoye Export Terminal Port Regulations.pdf - Inchcape ...

Prigorodnoye Export Terminal Port Regulations Rev 01
agreed between the ship and terminal in specific cases. Normally this is at five year
intervals.
• Test of electric/hard wire communications and ESD facility to be tested periodically.
29 LNG Cargo Handling
Cargo handling operations onboard vessels shall be performed in compliance with the requirements
of the ship’s builders ”Cargo Operations Manual”.
29.1 Normal Loading
On completion of ESD tests Prigorodnoye Control Room, the Loading Master and the
Responsible Ship’s Officer shall confirm that all systems are lined up and ready.
29.2 Cooldown
The Responsible Ship’s Officer in the tanker’s cargo control room (CCR) shall confirm that the
ship's manifolds, liquid and vapour, are open and that they are ready to receive product.
Prigorodnoye Control Room and the Loading Master shall confirm to the ship that the shore is
ready to commence cooldown of the loading arms.
Following the above confirmation, cooldown of all three liquid loading arms will commence.
On completion of cooldown of the loading arms the flow rate will be adjusted according to the
ships requirements for cooldown of ship's lines and tanks.
The use of the vapour arm for vapour return to shore and control of ships cargo tank
pressures is to be closely monitored at all times. Close liaison is required between ship and
shore as the ship’s return gas blowers are ramped up during cooldown and increasing loading
rate for increased vapour return to shore. Shore will lead all return vapour to the boil off gas
(BOG) system for recovery and re-liquefaction. As such the rate of return gas to shore is to be
adjusted slowly by ship, liaising with shore, to prevent overloading the shore system with the
potential of a shore BOG system trip and diverting boil off gas to flare.
Avoiding the use of the flare by careful return boil off gas vapour pressure management is to
be pursued at all times. A careful management of cooldown rate and return boil off gas
pressure will achieve full boil off gas re-liquefaction recovery with no environmental impact of
flaring.
For control of return gas from ship it is important that the Prigorodnoye Control Room is
informed when the return gas compressor is started and stopped on the ship. Excessive
return gas to shore must be avoided otherwise high pressure in shore tanks will cause the
plant to trip. The starting of two compressors close together is prohibited unless pre arranged
with Prigorodnoye Control Room and the vapour line is open to the flare. Ships are requested
to increase return gas compressor slowly, as controllable, to maximum in a period of not less
than 1 hour.
During cooldown of the loading arms it is normal practice that ships will return vapour to shore
without use of compressor i.e. freeflow. Ships must open the vapour control valve to shore
0000-S-90-01-P-0207-00-E
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BM Code: EP.14.03.01.09