GTT (Gaztransport & Technigaz) is an engineering company that designs cryogenic membrane containment systems dedicated to the transport and storage of liquefied gases, in particular liquefied natural gas (LNG).

For over 50 years, GTT has developed technological expertise in the liquefied gas industry, building trusting relationships and lasting partnerships with the different stakeholders (shipyards, shipowners, gas companies, terminal operators and classification societies). The company provides them with established, secure and efficient technologies for containment of liquefied gas at low temperatures. GTT helps its customers define their requirements before translating them into membrane-based solutions for multi-gas and LNG transport, as well as onshore and offshore storage (FSRUs and FLNGs).

New markets

The company is currently expanding its offer to new and promising markets, providing customised technological and engineering solutions for small and mid-scale vessels, as well as new applications for the LNG market, such as the use of LNG as a propulsion fuel and the associated logistic chain. GTT develops innovative solutions to ease bunkering operations as well as to optimise the LNG volume and the space occupied, resulting in a minimum loss of cargo capacity. The company offers highly competitive storage and handling solutions that cover the whole logistic chain, from the LNG liquefaction and export terminal in a producer country to the tank of an LNG-fuelled ship.

Future stakes

2020 will see the implementation of the Global Sulphur Cap, which will reduce the limit for sulphur oxide emissions in the world's oceans from 3.50% today to 0.50%. The European Union and China have also announced measures to limit the emissions of vessels in many ports and high traffic areas. LNG as fuel offers a viable solution for this energy transition. LNG propulsion has been used successfully on LNG carriers for many years. It reduces significantly the emission of SOx and NOx.


GTT provides bespoke solutions for different segments:

  • cruise
  • very large container ships (VLCS)
  • tankers
  • bulk carriers.


GTT offers its customers a wide range of services, at each stage of the liquefied gas chain:

  • consultancy
  • training
  • maintenance assistance
  • technical studies.


GTT's proven membrane containment systems offer several distinctive advantages:

  • optimisation of cargo storage space
  • reduced vessel construction and operation costs
  • modular design allowing for flexible assembly in vessels of all sizes without significant capital expenditures.

Products and services

NO96 Max
Mark III
Mark III Flex
Mark III Flex+
Mark Fit™