Gaztransport et Technigaz (GTT) is a French engineering group specializing in membrane containment systems for the transport and storage of liquefied gases, primarily liquefied natural gas (LNG). Formed from the merger of Gaztransport and Technigaz, the company designs and licenses its proprietary technologies—most notably the Mark III and NO96 systems—used on LNG carriers, floating units such as FSRUs and FLNGs, and onshore storage tanks. GTT also develops solutions for LNG as a marine fuel, supporting the decarbonization of shipping.
Headquartered in Saint-Rémy-lès-Chevreuse, France, GTT provides engineering, materials qualification, testing, and technical assistance to shipyards, shipowners, and terminal operators. Its activities include sloshing assessment, thermal insulation design for cryogenic applications, and digital services for monitoring and optimizing liquefied gas operations. The company conducts ongoing R&D into technologies for other cryogenic fluids and emerging energy applications.
Also known as Gaztransport & Technigaz S.A..
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UPM's new spruce plywood, developed with GTT, enhances LNG transport with improved insulation, sustainability, and increased production capacity.
