Bureau Veritas Delivers Design Approval for GTT NEXT1 LNG Cargo Containment System


Bureau Veritas Delivers Design Approval for GTT NEXT1 LNG Cargo Containment System

Jun. 6 2024

At the Posidonia 2024 international shipping exhibition in Athens, Greece, Bureau Veritas (BV), a global leader in the Testing, Inspection, and Certification (TIC) industry, awarded a Design Approval (DA) to GTT, the technology expert in membrane containment systems used to transport and store liquefied gases, for its GTT NEXT1 LNG cargo containment system.

GTT NEXT1 technology aims to offer a thermal level of performance equivalent to that of Mark III Flex+ technology1 while using two metallic barriers. The use of prefabricated reinforced polyurethane foam panels to support the two membranes provides the best compromise between thermal and mechanical performance. The secondary barrier is made of Invar, and the design of the first barrier is based on the existing corrugated stainless steel concept, similar to that of the Mark technologies. By activating these design levers, it is possible to deliver significant performance improvements, while using proven materials and components. GTT NEXT1 is now ready to be considered in future LNG carrier projects by relevant builders and shipowners.

To deliver the Design Approval, Bureau Veritas conducted a comprehensive review of the technology in accordance with all applicable rules and regulations, including the International Maritime Organization's International Gas Carrier Code (IMO IGC Code), BV NR 467 - Rules for the Classification of Steel Ships, BV Guidance Note NI 554 - Design Sloshing Loads for LNG Membrane Tanks, and BV Guidance Note NI 564 - Strength Assessment of LNG Membrane Tanks under Sloshing Loads.

Philippe Berterottière, Chairman and CEO of GTT, stated: "The approval from Bureau Veritas for our GTT NEXT1 LNG cargo containment system demonstrates our unwavering commitment to innovation and technological excellence. We are proud to present this cutting-edge solution, which combines the best of our proven technologies with new advancements, ensuring optimal performance and improved reliability for the transportation of liquefied natural gas."

Matthieu de Tugny
de Tugny


Bureau Veritas Marine & Offshore

I would like to congratulate GTT on the development of this GTT NEXT1 cargo containment system - another significant GTT technological advancement, providing ever-more efficient solutions for moving by sea the cleanest energy, global available at scale. Bureau Veritas experts have been there every step of the way. We are so very proud to be involved in this latest evolution, reflecting our commitment to helping secure safe and reliable solutions for the transportation of liquefied natural gas working yet again in collaboration with GTT.

1 Mark III Flex+ offers a guaranteed boil-off rate of 0,07% of cargo volume per day.