Looking for a specific product?

Make a search for products & suppliers, articles & news.

DNV GL presents GTT and TECHNOLOG with GASA statement for exoskeleton LNG tanks

The solution has been developed for VLCVs with a capacity of 14,000 to 18,000 

Dnv Gl AS

DNV GL presented GTT and TECHNOLOG with a GASA statement for the retrofit of very large container vessels (VLCVs) with exoskeleton membrane LNG tanks. From left to right: Helmut Radebold, TECHNOLOG, Geoffroy Beutter, GTT, Henning Pewe, DNV GL - Maritime, Gerd-Michael Würsig, DNV GL – Maritime, Hans-Jürgen Voigt, TECHNOLOG.


At the Marintec China trade fair today, classification society DNV GL presented GTT, together with its partner TECHNOLOG, a General Approval for Ship Application (GASA) statement for the retrofit of very large container vessels (VLCVs) with exoskeleton membrane LNG tanks.

LNG membrane tanks will generally offer more efficient space utilisation for cargo storage and as fuel tanks. The exoskeleton concept offered by GTT, and developed in partnership with TECHNOLOG, consists of a structure that can be prebuilt on the dock and then installed as a complete unit in the hull of the vessel. This greatly reduces the construction time of the ship at the yard and eliminates the necessity to go into dry dock. 

The solution has been developed for VLCVs with a capacity of 14,000 to 18,000 TEU and offers a new possibility for owners to more easily refit existing vessels with an LNG fuel system. Switching to using LNG as a ship fuel will mean a vessel will comply with incoming restrictions on the use of high sulphurs fuels.   

“The GASA approval issued by DNV GL is very important for us, as it shows that the new solution can be ordered and retrofitted today,” says Philippe Berterottière, Chairman and CEO of GTT. “It will allow interested shipowners to get ahead of the IMO’s 2020 Global Sulphur Cap regulations, giving customers and charterers greater certainty as we head to this significant regulatory change. By bringing this solution to market, GTT reaffirms its position as an innovative provider for the industry, continually working to optimize our customer’s operational performance.”    

“This advanced technology is a milestone for cost-effective LNG retrofit and newbuilding solutions for larger vessels. With introduction of LNG as ship fuel there are immediate benefits to ship owners related to a reduced carbon dioxide footprint (EEDI) as well as all other harmful exhaust emissions,” said Hans-Jürgen Voigt, Shareholder and Managing Director of TECHNOLOG.

“We congratulate GTT and TECHNOLOG on achieving this milestone,” says Knut Ørbeck-Nilssen, CEO DNV GL – Maritime. “This innovative new solution offers forward thinking shipowners another option when they are considering LNG as a ship fuel and will help to continue the development of this important technology. We look forward to building on this excellent cooperation with GTT and TECHNOLOG in the future.”

A General Approval for Ship Application (GASA) is a full approval of the technology under consideration, according to the DNV GL Rules for Classification, which examines a typical installation of the technology in a vessel.

About GTT

GTT (Gaztransport & Technigaz) is an engineering company expert in containment systems with cryogenic membranes used to transport and store liquefied gas, in particular LNG (Liquefied Natural Gas). For over 50 years, GTT has been maintaining reliable relationships with all stakeholders of the gas industry (shipyards, shipowners, gas companies, terminal operators, classification societies). The company designs and provides technologies which combine operational efficiency and safety, to equip LNG carriers, floating terminals, and multi-gas carriers. GTT also develops solutions dedicated to land storage and to the use of LNG as fuel for the vessel propulsion, as well as a full range of services. GTT is listed on Euronext Paris, Compartment A (ISIN FR0011726835 Euronext Paris: GTT) and is notably included in SBF 120 and MSCI Small Cap indices.

For more information visit www.gtt.fr


For over 30 years, TECHNOLOG has been working on behalf of their clients in the maritime industry across the globe. As a consulting company and design office, TECHNOLOG covers a wide range of tasks, from concepts to implementations via project developments. Above and beyond this, TECHNOLOG offers many innovative solutions in various fields. The portfolio ranges from Container- and Multi-Purpose Vessels, Bulk Carriers, Research and Ice-going Vessels to Special Purpose Ships. Based in Hamburg, TECHNOLOG serves customers worldwide – supported by an international partner network and a TECHNOLOG branch in China.

For more information visit www.technolog.biz



Associated companies:

Related news

Latest news

Chairman Knut Ørbeck-Nilssen sets out transformation of IACS at CMA Shipping 2018

To help the maritime community ensure the cyber-resilience of their assets, 

DNV GL opens LNG test centre to enable safer and more efficient use of LNG

The ability to monitor the composition of LNG in real time 

Peter Brun appointed as DNV GL’s new global offshore wind segment leader

Brun brings more than 26 years of experience 

Getting a solid overview of silicon production at Elkem Thamshavn

Major investment by Bremnes Seashore

The contract comprises two Polarcirkel 1050 Cabin, 

Are you in full control of your equipment?

Poorly maintained nets may harm the fish.

Windcat Workboats builds their 19th and 20th vessel with Servogear CPP

The delivery of the Servogear Ecoflow Propulsor to Windcat 43 and Windcat 44 will take place in Q2 and Q4 2018.   

Steinsvik named “Company of the Year 2017”

Development takes time, and this company is a good example of that.

DNV GL primary project partner in Northern Gas Networks led Hydrogen Network Innovation ProjectNv

The project is split into two phases.