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

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Prigorodnoye Export Terminal Port Regulations Rev 01 purging shall be repeated until the O2 content is less than 1% by volume. 28.7 Water Curtain Prior to connecting the loading arms to the ship's manifold valves the ship shall start up the water curtain at the manifold and all other deck protective systems for tank domes as required. Winter precautions shall be exercised when very low temperatures are experienced with trays to be in place with 25% water fill and overside water curtain sprays running. Should the deck freeze, the water supply may be shut off. Note the LNG tankers manifold water curtain is a separate issue to the availability of the vessel’s IMO standard water spray fire curtain. This should be drained to avoid icing issues but emergency pumps should be available at immediate notice in case of fire and emergency use. During the winter season utmost care is to be taken to avoid the following systems freezing. • Fire main. • Foam main. • Valve hydraulics. • Emergency escapes. • De-icing equipment. • Personnel ice contact issues. 28.8 Gauging Before the ship's manifold valves are opened gauging of the ship's tanks will take place on all occasions, regardless of the status of the ship's tanks. This process is to be witnessed by the Responsible Ship’s Officer, the Loading Master, the independent cargo surveyor, as required, and any other individual with a recognised and legitimate interest in the loading operation. 28.9 ESD Tests In addition to any tests that may be carried out by the vessel and terminal prior to the ship's arrival, the following Emergency Shutdown (ESD) tests shall be conducted in conjunction with each ship and shore at the start of loading as follows. • A “warm” ESD test, before cooldown, when both terminal and ship have confirmed ready for test, initiate by the Ship. A second “warm” ESD test, with loading arms still at ambient temperature, may be performed by the terminal if requested by the Loading Master, such as for first cargo loading after new build or refit. • An additional “cold” ESD test will be initiated by the Terminal, after cooldown of the loading arms. This is to confirm all valves still close correctly in the fully refrigerated condition. This test will be performed with prior notice, giving a standby advice, agreed readiness, under a countdown and the closing timings for the ship and shore valves are to be recorded. This “cold” ESD test, with loading arms cooled down to LNG temperature, may also be initiated on alternate loadings, by the ship, if deemed so required. • Requirements to test ESD1 (loading/manifold valve and pump trip test) and ESD2 (loading/manifold valve, pump trip and loading arm emergency release test) shall be 0000-S-90-01-P-0207-00-E Page 54 of 101 BM Code: EP.14.03.01.09
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 Page 55 of 101 BM Code: EP.14.03.01.09
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