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DHSC RECEIVES AIP FOR LNG-FUELLED AFRAMAX DESIGN

Thursday, April 4, 2019 

A joint development project between classification society DNV GL and Korea’s Daehan Shipbuilding Corporation (DHSC) has resulted in a ready-to-build design for an LNG-fuelled 115,000dwt Aframax tanker.

DHSC compiled drawing packages for the onboard LNG systems of the Aframax vessel and submitted them to DNV GL’s Approval Centre Korea (ACK) for review and verification, after which the classification society granted Approval in Principle (AiP) for the design. The complete design is now ready for execution and available to interested customers.

“We appreciate DNV GL’s efforts to ensure a successful JDP. Widening and deepening the technical expertise is essential to achieve DHSC’s vision to be the best medium-sized shipyard in Korea. DNV GL is the right partner to accomplish this,” said Yong-Duk Park, CEO & President of DHSC.

A key feature of the design is its dual-fuel, low-pressure engine that can run on MGO or LNG. The vessel features two Type-C tanks holding 850m3 each. Made of nine per cent nickel steel, a material typically used in cryogenic applications, the tanks and the fuel handling system are located on the upper deck in front of the crew accommodations, with the tanks oriented in longitudinal direction of the ship.

This open-air placement above the cargo tanks is preferable onboard oil and product tankers for safety reasons: in the event of a gas leak, gas cannot accumulate to dangerous levels in an enclosed space and ignite in the presence of electrical equipment or other ignition sources. Furthermore, the arrangement on deck means that no cargo space is lost to fuel tanks, which would be the case if a membrane tank system were used.

Type-C tanks are pressure vessels designed to handle significantly higher pressures and loading rates than other tank types. They are considered very safe and reliable, are comparatively easy to fabricate, and can handle the pressure increases caused by boil-off gas. DHSC leaves the choice of tank design - double-walled or foam-insulated - to the customer.

DHSC now has an approved design and source technology that can satisfy the sulphur cap regulations taking effect on 1 January 2020. An industry press release resulted in several enquiries from shipowners and brokers who wanted to learn more about DHSC and this new design.

The shipbuilding company is planning to visit several shipowners in Norway, Greece, the Southeast Asia and other countries to present the design, and is confident that building contracts will follow eventually.

“We believe the completion of this joint development project will allow us to take a competitive position in a challenging market,” said Mr Park. “We are certain the eco-friendly designs by DHSC will attract newbuilding orders. The result of the JDP will be another enabler for us to strengthen our marketing strategy.”

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