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From
an engineering standpoint, the Escravos LPG
FSO was exceptional for its use of the IHI SPB containment
system for its independent cargo tanks.
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ne
of the first purpose-built LPG FSOs, the Escravos LPG
FSO, will |
turn four
in 2001 amid industry expectation that building for LPG FSOs
could be set to increase. This is due, in part, to strong interest
in FPSOs and new more compelling profit and regulatory motivations
to extract gas as well as oil from wells. ABS has seen an increased
number of proposals for LPG FSOs, many of them double the size
of the Escravos LPG FSO which has storage capacity of
54,000 m3 LPG.
"The
Escravos LPG FSO represents an outstanding project
where safety and longevity provided the basis for design and
construction decisions," said Charles Dunlap, ABS Principal
Engineer, Tanker, Bulk Carrier & Ship Safety Group.
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The Escravos
LPG FSO, a Chevron project, can operate for 20 years without drydocking
and is currently harvesting gas from two fields, Okan and Mefa, offshore
of Nigeria.
From an engineering
standpoint, the Escravos LPG FSO was exceptional for its
use of the IHI SPB containment system for its independent cargo
tanks. Also interesting was the permanent mooring of the installation,
which is via an external turret system designed by SOFEC and built
by Brown & Root. The turret incorporates the swivel connecting
the gas import riser to the vessel.
For this project,
ABS provided a full range of engineering design review, independent
analyses and survey services. The vessel was built at IHI according
to ABS Rules and incorporating components of the IGC Code, particularly
the type B independent tank requirements. It has been operating
successfully and safely off the coast of Nigeria since delivery.
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