Rock and Roll Method at sea Tank cleaning for double bottom tank:
Recommended time to clean and gas-free under normal circumstances would be 3-6 days ,for cleaning of double bottom tanks at sea.
1) First of all heat the remaining oil in tanks .
2) By stripping constantly. flush the tank with sea water,
3) Close all suction and discharge valves .
4)1st Dose Fill the tanks by ½ to 1 litre sea voyage Tank clean plus per tone of water through pipe or manhole , for 75-80% of capacity of tank to be cleaned.
5) Then fill tank to 25% capacity with sea water, raise the temperature up to 60°C maximum, and maintain this temperature for 24 hours.
6) Top up tank to 75-80% capacity with sea water, continue to heat for 48 to 72 hours.
7) Discharge and strip tank. Fill to 50-60% capacity with sea water and allow 2 hours rinsing time.
8) Discharge tank and strip, flushing tank with sea water for 2 hours,stripping continuously. When completed, inspect tank to ascertain if second cleaning is required. If so:
9) For completion add second dose of Sea Voyage Tankclean, fill tank with sea water 75-80% capacity and raise the temperature to 60°C maximum. Maintain this for 48 to 72 hours. And recirculate the solution .
10) Discharge and strip tank, flush with sea water, stripping continuously for 2 hours.
11) To gas-free, fill tank with sea water to overflow through vents and sounding pipes, discharge and strip completely.
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