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The tanker requirements include the following systems:
1. Cargo Oil Storage
2. Structural provision for accommodation, turret & cranes
3. Crude Oil Washing (COW) system
4. Inert Gas (IG) system
5. Slop tank system
6. Ballast water system
7. Fuel oil system
8. Safety systems
The standard approach when designing a new build FPSO
is to start with a clean sheet and design an offshore structure as a
permanently moored vessel according to regulatory requirements,
e.g. Lloyds rules. This typically results in an optimised structure
that bears little resemblance to a trading tanker, which is the
source for a majority of converted FPSOs. The trading tanker
business is a highly competitive market where tanker designs have
evolved out of necessity into a “no frills” vessel that provide a
minimum cost product that employ the maximum capability of the
respective shipyards to manufacture a tanker within a tight
fabrication schedule slot. Accordingly, the tanker option would
involve modification of a standard Aframax tanker at the design
stage in order to introduce the specific requirements of the FPSO;
whilst retaining as much of the trading tanker design as possible.
The modifications to the vessel would be similar to those
employed for the converted FPSO, with the added benefit of new
equipment instead of refurbishment of the old, and the
optimisation of the marine systems that new fabrication allows.
The design modifications to the hull are assumed to be minimal,
hence no changes are made to the hull framing, plate thickness or
welds on the basis that the proposed duty will not exceed that of a
tanker working on worldwide duty. Secondly, the main changes in
duty are configured through the turret and the topsides process
loads, which are both accounted for via supplementary stiffening.
Hull Particulars: (800,000 bbls Storage Tanker)
Loa 243.20 m
LbP 233.00m
Breadth 41 .80 m
Draught 13.60m
DWT 97,046 mt

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