GTT, a global leader in membrane containment systems for liquefied gases, has announced a strategic partnership with Hudong-Zhonghua Shipbuilding (Group) Co., Ltd., one of China’s premier shipbuilders. Together, the two companies have launched a joint innovation project focused on optimizing the performance and flexibility of LNG bunkering vessels, a vital link in the maritime energy transition.
This initiative aims to improve both operational efficiency and environmental performance through advanced technological integration and design innovation. At the heart of the project is the enhancement of LNG tank performance via GTT’s Mark III Flex membrane containment system, which allows for an increased design pressure from the current standard of 0.7 barg to 1 barg — with feasibility studies also planned for pushing pressure capability to 2 barg.
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Enhancing Performance Through Design Innovation
Increasing the design pressure to 1 barg — already approved by key Classification Societies — will unlock a series of operational and economic benefits for LNG bunkering vessel operators:
- Greater Operational Flexibility:
Higher pressure tanks allow LNG to be loaded at warmer temperatures, streamlining logistics and increasing sourcing options. Delivery speed during bunkering operations can also be accelerated. - Lower Energy Consumption:
Reduced reliance on subcoolers during idle or standby phases cuts electrical power needs, contributing to better energy efficiency and reduced emissions. - Forward-Looking Compliance:
The new design supports emerging regulatory trends, including AFNIR recommendations on cold ironing, by enabling extended holding times and reducing the need for gas management during port calls.
In addition, the partnership will explore the technical feasibility of raising design pressure to 2 barg, which would further reduce boil-off gas management complexity and expand vessel autonomy.
LNG’s Expanding Role and the Need for Infrastructure
The rise of liquefied natural gas (LNG) as a transitional marine fuel is reshaping the global shipping landscape. With its significantly lower emissions compared to traditional marine fuels, LNG is increasingly seen as a bridge solution toward decarbonization. However, the growth of LNG-fueled fleets demands a parallel expansion in LNG bunkering infrastructure — including more sophisticated and flexible bunkering vessels.
Investments in innovations like this GTT–Hudong-Zhonghua project are critical to scaling up global bunkering capabilities. As ports tighten emissions regulations and shipowners seek compliant, cost-effective fuel solutions, LNG bunkering vessels must evolve to meet higher efficiency standards and broader operational demands.
This partnership demonstrates industry leadership in tackling those infrastructure challenges head-on, ensuring that LNG remains a practical and scalable option for the future of shipping.
Driving Maritime Innovation
This strategic collaboration reflects the shared vision of GTT and Hudong-Zhonghua to deliver next-generation solutions that support both the energy transition and the operational demands of LNG bunkering. By focusing on efficiency, flexibility, and regulatory foresight, the two partners are helping to pave the way for a more sustainable maritime fuel infrastructure.
About GTT
GTT is a technological expert in containment systems with cryogenic membranes used to transport and store liquefied gases. For 60 years, GTT has been designing and providing cutting-edge technologies for better energy performance, combining operational efficiency and safety to equip LNG carriers, floating terminals, land storage, and multi-gas carriers. GTT also develops systems dedicated to the use of LNG as marine fuel, along with a full range of digital services for Smart Shipping. The Group is also active in hydrogen through its subsidiary Elogen, which designs and assembles electrolysers for the production of green hydrogen.
About GTT