New seawater system be installed to provide seawater for the service on the converted FPSO?

Asked by pasmith 5 years, 10 months ago | 1 Answers

Should existing seawater lift sea chests be sealed off and existing sea water pumps decommissioned and a new seawater system shall be installed to provide seawater for the service on the converted FPSO?


1 Answer

0
ekwuemesam 5 years, 10 months ago

Consider retention of the seawater lift chests and the followings:

  • Boroscopic inspection system capable of inspecting sea chest valves and sea chest condition without diver intervention during FPSO normal operation.
  • Replacement of all existing, retained, seawater cooling system shipside suction and overboard valves with high integrity type butterfly valves.
  • Additional isolation valves in the sea water crossover suction header so that essential cooling seawater is available at all times; even when one sea chest is under inspection (applicable for engine room only).
  • New reaction tank type MGPS to replace existing MGPS able to be maintained without closing sea chest.
  • Replacement of seawater cooling system shipside suction and overboard stub pipe pieces with minimum thickness equivalent to the adjacent side shell plate plus a corrosion factor of 3mm.
  • Bolt on type anodes inside sea chest box replaceable by divers.
  • Thorough inspection of existing PE coated seawater piping and replacement of any pipe that has suffered any pitting/grooving due to PE coating breakdown.
  • Minimum 6" shipside pipe pieces for easy ROV inspection.
  • Submission of new ICCP system covering underwater hull (including all new underwater structure and mooring equipment as well as the sea water suction system).