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GTT: Pioneering LNG Containment Systems and Industry Leadership

Briggs McCriddle

Gaztransport & Technigaz (GTT) is a leading engineering company specializing in membrane containment systems for the transport and storage of liquefied natural gas (LNG). With decades of expertise, GTT has played a critical role in shaping the LNG shipping industry by developing innovative technologies that enhance safety, efficiency, and environmental performance.


GTT is renowned for its proprietary membrane tank technologies, which have become the industry standard for LNG carriers and floating storage regasification units (FSRUs). These designs include:

- Mark III Flex System – A cryogenic membrane containment system that provides superior thermal efficiency and reduces LNG evaporation rates, enhancing fuel economy for shipowners.

- NO96 Series – A well-established containment system designed for large-capacity LNG carriers, featuring reinforced insulation to improve performance.

- GTT NEXT1 & NEXT2 – The company’s next-generation technologies aimed at further reducing boil-off rates and optimizing cargo operations.

These containment systems allow shipyards to construct more efficient LNG carriers while ensuring compliance with international safety and environmental standards.


GTT collaborates with major shipbuilders, energy companies, and shipowners worldwide. Some of its largest customers include:

- Samsung Heavy Industries (SHI) – One of the world’s largest shipbuilders, frequently incorporating GTT’s Mark III Flex system into its LNG carrier designs.

- Hyundai Heavy Industries (HHI) – Another leading shipyard that partners with GTT for the construction of LNG vessels.

- Hanwha Ocean (formerly DSME) – A key customer integrating GTT’s containment technologies in high-capacity LNG carriers.

- Shell, TotalEnergies, and BP – Major energy companies that rely on GTT’s containment systems for their global LNG shipping fleets.

- Mitsui O.S.K. Lines (MOL) and NYK Line – Prominent shipping companies investing in LNG carriers equipped with GTT-designed tanks.


GTT’s influence extends beyond shipbuilding. The company plays a crucial role in the decarbonization of maritime transport and energy logistics by:

- Enhancing LNG Shipping Efficiency – By reducing boil-off gas losses, GTT’s systems help operators maximize cargo efficiency and minimize emissions.

- Advancing Floating Storage and Regasification (FSRU) Technologies – GTT’s containment systems are integral to the development of floating LNG terminals, expanding global energy access.

- Innovating in Hydrogen and Ammonia Storage – As the industry explores alternative fuels, GTT is developing containment solutions for future energy carriers such as liquid hydrogen and ammonia.

- Supporting Compliance with IMO Regulations – By improving LNG containment efficiency, GTT helps shipowners comply with the International Maritime Organization’s (IMO) environmental regulations.



GTT stands at the forefront of LNG shipping innovation, providing state-of-the-art containment solutions that enhance safety, efficiency, and sustainability. With strong partnerships across shipbuilding and energy sectors, GTT continues to drive advancements in LNG technology, ensuring a cleaner and more efficient future for global maritime transport.

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