Harboursandport.com: Seoul - DNV GL has presented Hyundai Heavy Industries (HHI) with a general approval for ship application (GASA) for a new concept of very large crude carriers (VLCCs) with a centreline oil-tight longitudinal bulkhead.
DNV GL Regional Manager for
Korea & Japan, Vidar Dolonen, presents the GASA certificate to Seung Ho
Jeon, Executive Vice President of HHI, in Seoul.
The new design will reduce potential damage and operational risk by
featuring a simpler structural arrangement, loading patterns, and piping
arrangements. Vidar Dolonen, DNV GL Regional Manager for Korea & Japan,
presented the certificate to Seung Ho Jeon, Executive Vice President of HHI, in
Seoul.
A statement signed by Head of Corporate Communications, DNV GL
Maritime Communications, Tomas Barrett, noted that the new VLCC with a centreline longitudinal bulkhead design
concept was developed by HHI, marking a world first. The concept introduces a
single centreline design with two rows of cargo tanks, resulting in seven pairs
of tanks and one additional pair of slop tanks.
The
main benefit is an improvement in the operator’s convenience in terms of
cleaning, inspection, and maintenance by simpler structural, loading and piping
arrangements, as well as the reduction of piping systems and instruments due to
a smaller number of cargo tanks. Furthermore, the fuel consumption was improved
by developing new design lines for the new VLCC with a centreline longitudinal
bulkhead.
“Through joint development projects with DNV GL, we aim to
develop new technologies which enable our clients to comply with environmental
regulations and navigate their vessels in a safe and efficient way,” said Seung
Ho Jeon. “We believe the recent GASA approval is opening up a new era of VLCC
designs which significantly strengthen the competitiveness of these HHI built
ships.”
“The purpose of DNV GL is to contribute to the construction and
operation of smart and safe ships. We are pleased to have collaborated with HHI
in this exciting project and we wish the shipyard further success with its new
VLCC design” said Vidar Dolonen.
As part of the GASA scope, DNV GL carried out a full structural
verification and feasibility study in accordance with classification rules and
harmonized common structural rules (CSR). The details were confirmed by a fine
mesh analysis and a fatigue analysis. In addition, the sloshing and local
vibration analyses for cargo tanks were reviewed in a comparative study to
enhance the structural reliability of this new VLCC.
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