LR provides insight into its stamp of approval for GTT’s new LNG carrier design

The UK-based classification society Lloyd’s Register (LR) has shared the rationale behind granting an approval in principle (AiP) to French technological containment specialist Gaztransport & Technigaz (GTT) for its 200,000 cubic meters (cbm) liquefied natural gas (LNG) carrier concept.

The approval in question was awarded in October. According to LR, the “bold design” of the new carrier featuring slow-steaming navigation and three tanks instead of the traditional four paves the way for more sustainable LNG shipping solutions. 

The new concept is said to offer environmental and economic benefits, including cutting voyage-based emissions intensity by around 27%. Furthermore, it would entail unit freight cost (UFC) reductions of up to 5.5% by 2025 and 14% by 2050 in line with the relevant EU legislation. 

Lloyd’s Register Global Gas Segment Director, Panos Mitrou, noted: “This new design demonstrates that by challenging conventional thinking, we can reduce emission intensity without sacrificing transport capacity. Similar to the industry’s progression from steam to 4-stroke electric propulsion, and subsequently to 2-stroke engines, this concept could represent a potential next technological leap for LNGCs.” 

The classification society says a thorough evaluation of the cargo tank design has been conducted against class standards and IGC Code requirements to test the new structure’s integrity under increased sloshing loads. Additionally, the assessment extended to multiple GTT containment systems – Mark III Flex, Mark III Flex+, NO96 Super+, and GTT Next1 – confirming the design meets safety and performance criteria.

Jean-Baptiste Choimet, CEO of GTT, said: “This AiP from Lloyd’s Register is a major milestone for GTT and the LNG industry. Our three-tank design represents a significant leap forward in terms of efficiency and sustainability. By challenging conventional thinking and embracing innovation, we are paving the way for a greener future of LNG shipping.” 

In late October, the French player received approval for another vessel concept, with ClassNK issuing an AiP for a 30,000 cbm LNG carrier. The design features two identical tanks equipped with the firm’s Mark III Flex membrane containment system.