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Deltamarin and GTT receive ClassNK AiP for LNG-fueled VLCC design

Deltamarin and GTT receive ClassNK AiP for LNG-fueled VLCC design

April 13, 2023 –Deltamarin and GTT have received Approval in Principle (AiP) from the classification society ClassNK for the 12,500 m3 LNG dual fuel VLCC design. The AiP was received from NK 1st March 2023.

Deltamarin, GTT and ClassNK have been collaborating on the development of an LNG-fueled energy-efficient Very Large Crude Carrier. The vessel will meet current and future environmental targets by deploying a well-studied, pre-approved and truly clean-fuel technology ship containing GTT Membrane-type LNG tanks with LNG fuel stored at atmospheric pressure.

In close cooperation with GTT, Deltamarin studied different arrangements and solutions for placing the tank on the vessel. The ship’s energy efficiency was studied with the latest simulation tools and a holistic approach, providing not only a vessel using LNG as fuel but also the best possible efficiency with low emissions in this ship size class.

The approval from ClassNK proves that the onboard integration of a membrane fuel tank solution is technically feasible on an LNG-fueled tanker and that it meets all safety regulations. The new design offers a solution that complies with the environmental regulations adopted by the International Maritime Organization (IMO) until 2030. Compared to a traditional oil-fueled tanker, the new LNG-fueled tanker design reduces CO2 emissions by at least 20%. It also offers greater autonomy without reducing cargo volume.

The joint development between GTT and Deltamarin has innovated a holistic approach to overall efficiency and optimized for specific sea routes while taking into account hull form, propulsion, LNG containment system and power plant configuration.


About Deltamarin
Deltamarin Group provides ship design, offshore engineering, and construction support for the marine and offshore industries worldwide. The services include the full range of consulting, design, and engineering as well as procurement, support for construction and installation. The Group employs around 400 experts in its own and associated companies located in Europe and Asia. Deltamarin is part of China Merchants Group. deltamarin.com
About GTT
GTT is a technological expert in containment systems with cryogenic membranes used to transport and store liquefied gases. For over 50 years, GTT has been designing and providing cutting-edge technologies for a better energy performance, which combine operational efficiency and safety, to equip LNG carriers, floating terminals, land storage, and multi-gas carriers. GTT also develops systems dedicated to the use of LNG as fuel, as well as a full range of services, including digital services in the field of Smart Shipping. The Group is also active in hydrogen through its subsidiary Elogen, which designs and assembles electrolysers notably for the production of green hydrogen. GTT is listed on Euronext Paris, Compartment A (ISIN FR0011726835 Euronext Paris: GTT) and is notably included in SBF 120 and MSCI Small Cap indices.gtt.fr

For more information, please contact

Kristian Knaapi
Sales, Cargo Ships
+358 2 4336 453
+358 40 7006 905