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Prigorodnoye Export Terminal Port Regulations Rev 01 gradually to all the shore compressors to ramp up slowly. Ship must communicate with the Prigorodnoye Control Room to ensure trouble free return gas. 29.3 Bulk Loading & Topping Off Increase of loading rate ramp up to maximum flow rate shall be at the ship's request. The times of starting and stopping loading pumps shall be recorded and Prigorodnoye Control Room shall advise the ship on each occasion when shore loading pumps are started or stopped. When both ship and shore are ready shore will start the first loading pump. Official time of starting will be agreed. After ten minutes the second pump will be started and remaining pumps started at five minute intervals after confirmation with the ship that it is ready. Once all pumps are online the Prigorodnoye Control Room will stabilize the bulk loading rate. Loading rates and quantity loaded (in cubic metres) are to be calculated and recorded hourly by the ship and Prigorodnoye Control Room advised. Any unexpected increase in back pressure at the shore manifold indicating possible blockage of strainers in the loading lines will result in loading being suspended until the cause has been ascertained and rectified. The tanker is to advise Prigorodnoye Control Room one (1) hour prior to the commencement of ‘topping off’ the first cargo tank, and thereafter give fifteen (15) minutes and five (5) minutes notice to stand-by for the completion of loading. Loading rate will be decreased throughout the ‘topping off’ process in accordance with the tanker’s requirements and by agreement with the terminal to allow sufficient time to stop loading pumps. Loading pumps will be stopped one at a time by shore control during the ramp down period as request by the ship 29.4 Draining & Inerting of Loading Arms On completion of loading the ship’s manifold valves will be closed with the ship’s last tank filling valve remaining open for draining/line warming/expansion. The terminal’s liquid loading arm valves should be closed, and the confirmed between ship/shore that both sets of liquid valves are fully closed. The vapour line should remain open throughout draining and purging of liquid arms. The loading arms will then be pressurised with nitrogen to 2.0 bar. Shore will then drain back loading arms to the circulation line. The loading arms will then be re-pressurised with nitrogen and lines drained back to the ship via the manifold loading by-pass. Continue purging with nitrogen back to ship until loading arms contain less than 2% hydrocarbon by volume, measured at the manifold vent. A final Nitrogen purge to the shore may be required. Liquid loading arms may then be disconnected. With the agreement of the ship the vapour manifold valve can then be closed, the arm purged with nitrogen until less than 2% hydrocarbon by volume is recorded, after which the vapour arm can then be disconnected. 0000-S-90-01-P-0207-00-E Page 56 of 101 BM Code: EP.14.03.01.09
Prigorodnoye Export Terminal Port Regulations Rev 01 29.5 Vessels arriving in the Inerted Condition Vessels may only arrive at the terminal inerted following new build or refit. Vessels arriving to load at the terminal with tanks in the inerted condition will be required to handle the vapour generated utilising the on board systems until the CO2 content of vapour in the ship’s tanks is 1% or less. Inert tank vapour may initially be discharged to atmosphere until a hydrocarbon content of 8% is recorded at the ship’s vent stack, at which stage the CO2 content of the vapour should be sufficiently low enough to support combustion of vapour in the ship’s boiler, if permitted in section 26.2. This process should continue until the CO2 content of the tank vapour reaches 1% or less at which time the terminal may accept vapour as boil off gas (BOG) to shore flare system as in section 29.6. 29.6 Re-gasification & Cooldown All ship’s tank vapour will initially be routed to ship’s vents until hydrocarbon level reaches >8% by volume after which vapour may be diverted to shore flare system. The level of CO2 in the return gas will be monitored ashore until this has been confirmed to be less than 200 ppm. On ship’s confirmation that CO 2 level is less than 200ppm, the terminal will require a stop in order to change over the return gas from flare system to the boil off gas (BOG) shore tanks. It is anticipated that this stoppage will be for approximately five minutes, but every effort will be made to minimise the time involved. The terminal will continue to monitor the CO2 levels of the return gas until it is less than 200ppm at which time gassing up will be stopped to permit changeover of shore return gas from flare system to the shore tanks. A close liaison between the Responsible Ship’s Officer, The Loading Master and the Prigorodonoye Control Room will be required during this operation to permit a smooth operation and best use of vapour recovery with minimal use of flared vapour. 29.7 Single Arm Cooldown The line up and cool down of the tanker's loading lines will be as per the normal cooldown procedure in 29.2 except that only one loading arm, will be required to be cooled at this stage. The loading arm to be used will be advised by the Loading Master at the on board pre-loading meeting and agreed with the vessel. After cooldown of the nominated loading arm (at least one hour) flow rate to the tanker will be adjusted in accordance with the tanker’s requirement. in During the latter stages of the cooldown the remaining two loading arms will be cooled down keeping with the overall flow rate required by the tanker. At the completion of cooldown loading will be stopped to carry out a ‘cold’ ESD test as above. 29.8 Draining and Inerting of Loading Arms Draining, purging and inerting of loading arms will be carried out as above section 29.4. 0000-S-90-01-P-0207-00-E Page 57 of 101 BM Code: EP.14.03.01.09
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