GTT announces new developments in its membrane technologies and related services

GTT announces new developments in its membrane technologies and related services

  • Introduction of Mark V, an updated version of the Mark III system
  • Launching of NO 96 Max, an upgrade of the NO96 design
  • Opening of a training center in France in June 2014

At its 4th Innovation & Technology seminar, held on March 28th at the end of Gastech, the gas technology conference and exhibition held in Seoul, Korea, GTT presented the new Mark V & NO 96 Max systems and  a new training centre, expanding the group’s range of services for the LNG transportation and storage sector.


The Mark V, a variant of the well-known Mark III system, introduced in 2013 at the LNG 17 conference for LNG bunker tank projects with a new metallic secondary barrier, is now available for use in LNG carriers to be constructed in 2016 and delivered in 2018.

In addition, the new NO 96 Max system, an upgrade of the well-known NO96 GW design, incorporating an innovative pillar-type insulation box construction, will also be available as of 2016.

Both systems incorporate solutions for a low daily cargo evaporation, known as daily Boil-Off Rate, at a guaranteed 0.09% of cargo volume per day combined with an optimization of the construction process and cost.

These systems are designed to equip the next generation of LNG carriers featuring more efficient propulsion systems (less requirements for Boil-Off Gas for propulsion) and optimized hull forms.

GTT also announced that the current and future membrane systems meet the requirements for the carriage of other liquid gases such as ethane, ethylene, butane, etc, further extending their flexibility.


To enhance its service offer, already including service agreements for ship-owners and a 24 hour, 7/7 hotline, GTT has opened a new Training Centre in its headquarters near Paris, France.

Staffed by a team of specialist instructors with extensive training experience within the maritime sector, and drawing on available expertise within GTT, the Centre will provide training courses based on practical exercises in relation  to the LNG industry, not only focused on GTT’s technologies.  Equipped with state of the art equipment, and a newly developed LNG operation simulator, the centre will offer a portfolio of courses covering the whole range of LNG handling operations in the maritime and shore based sectors.

The first courses will start at the end of June, focusing on the training required for ship officers on LNG Carriers, and the practical aspects to be considered when using LNG as a fuel.

Press contact:

+33 1 30 23 20 41/

GTT North America receives AIP for Membrane LNG Bunker Barge

Houston-based GTT North America (GTTNA), US subsidiary of French engineering and technology company GTT (Gaztransport & Technigaz SA), has received approval in principle from ABS for the design of a 2,200 cubic meter liquefied natural gas (LNG) bunker barge.  The distinctive design incorporates GTT’s proven membrane Cargo Containment System (CCS), which is utilized in 70% of the global LNG carrier fleet and nearly 90% of LNG carrier projects on order.

Leveraging over five decades of LNG storage and maritime transportation experience, GTT developed the membrane LNG bunker barge to demonstrate the efficient storage of LNG and safe, reliable management of Boil-Off Gas (BOG) in an unmanned push barge application.  The barge was designed for use in bunkering operations including ship-to-ship LNG transfers or LNG bulk transport in US inland waterways, harbors, and intra-coastal service.  The barge could operate as a mobile refueling resource or be moored temporarily to serve as a refueling station.

“An important step in the wide-range adoption of LNG as a marine fuel is the development of bunkering infrastructure that can adequately meet the various operational needs of vessels,” said ABS Director of US Gas Solutions, Roy Bleiberg. “The use of the LNG bunker barge will be a critical part of infrastructure development and this design, which leverages proven GTT technology, is certainly a concept that LNG stakeholders should consider.”

The CCS selected for the barge was GTT’s proprietary Mark III Flex system, an enhancement of the Mark III system that allows for improved thermal and structural performance of the CCS. The Mark III membrane CCS consists of a cryogenic liner directly supported by the vessel’s inner hull, which allows for maximum volumetric utilization of the available cargo space.  This liner is composed of a primary metallic membrane fastened atop a prefabricated insulation panel that includes a complete secondary membrane.

The GTT membrane LNG bunker barge will be capable of loading 2156 m3 (@98%) or 570,000 US gallons within 4.5 hours and towed at maximum speed of 8 knots in an efficient footprint: 64.2 m (212 ft) overall length, 14.8 m (48.5 ft) breadth, 7.2 m (15.7 ft) depth, and 2.6 m (8.5 ft) fully loaded design draft.  The dimensions and gross tonnage of approximately 1440 GT afford the GTT membrane LNG bunker barge greater maneuverability and access throughout inland and intra-coastal waterways.

A distinguishing feature of the GTT membrane LNG bunker barge is the management of natural BOG through small-scale reliquefaction units.  The StirLNG-4 cryo-cooler unit from the Netherlands-based Stirling Cryogenics was the basis of the boil off management system design.

“This barge design, now approved in principle by ABS, provides a robust solution for boil off gas management, an essential requirement for any atmospheric LNG storage system.  The design is a major step forward in bringing the coldest cargo with the highest stored energy value to the US LNG fuel market in a safe manner.” said Allyn Risley, Chairman, GTT North America.

Alameda, CA-based Herbert Engineering Corp. (HEC) was commissioned to develop the hull and preliminary machinery design scope and Houston-based CH-IV International to develop the cargo handling system (CHS) design scope.

ABS Consulting also assisted in the development of the GTT membrane LNG bunker barge project.

Press contact:

Allyn Risley: +1 713 400 4502  -

Gabadi and GTT signed a TSA for the maintenance and repair of GTT membrane containment systems

On February 4th 2014, Gabadi and GTT signed a Technical Services Agreement for the maintenance and repair of membrane containment systems, qualifying Gabadi to provide its services as subcontractor to repair shipyards and ship owners.

Fincantieri and GTT signed a TSA for the maintenance and repair of GTT membrane containment systems

On December 20th 2013, Fincantieri and GTT signed a Technical Services Agreement qualifying the Palermo Shipyard and the Trieste Shipyard to provide the maintenance and repair works on membrane containment systems.


GTT present at Gastech 2014

Every eighteen months, Gastech is the place to be for the stakeholders involved in the field of Natural Gas and provides a unique opportunity to meet energy professionals from all around the globe.

For the 7th consecutive time, GTT will be present with a booth at the 2014 edition of Gastech in Seoul, Korea, which is taking place from 24 to 27th March.

The focus of the GTT presence will be on new technological developments, Small Scale LNG carriers, LNG fuel Tanks and Services.

Please visit us at our booth G60.


On the occasion of the CoTE Seminars, GTT experts will also give two lectures:

• Alternatives for LNG Tank Commercial Vessels-some innovative designs, on March 25 at 14:55

• Advances in GTT Membrane type tank design for large & small scale LNG carriers, on March 26 at 11:10.

Press contact

+33 7 87 51 95 90/

Enhanced Safety for LNG Vessels : StormGeo’s Seaware product adds GTT’s tank sloshing prediction and alerting system

January, 2014, Saint-Rémy-lès-Chevreuse, France and Bergen, Norway – StormGeo, the global weather services company, has partnered with French company GTT to add enhanced Liquid Natural Gas (LNG) membrane tank sloshing prediction and monitoring to their current Seaware EnRoute Live (ERL) onboard software product. LNG shippers who use this product will benefit from Seaware seakeeping operational decision support that incorporates components of ship motion, stability, weather, and sea state. This well proven vessel monitoring complements GTT’s industry leading expertise in the design and development of cargo tank systems for LNG carriers.

Sloshing in tanks is one operational factor to be considered for all LNG carrier owners or operators. Due to its stochastic nature, sloshing can generate impacts on the containment system, for which zero risk cannot be attained, even in moderate sea states. Furthermore, sloshing is also identified as a first order factor for the increase in natural boil off of the liquid cargo. Managing the risk of sloshing is then a critical economical concern for all the actors of maritime LNG transport. To avoid an excessive tank sloshing incident at sea, this Seaware on-board system with GTT’s Sloshing Prediction Program takes into account the detailed hull lines of the ship, the actual loading condition, roll damping, wave spectrum, and ship speed/heading. The captain can, prior to departure, simulate and plan a sailing route mitigating potential tank sloshing risks as part of a safe and efficient Seaware calculated optimized route recommendation. As loading condition, weather, and sea state conditions can change during transit, Seaware’s ERL uses its tactical alerting mode to alert the Captain and bridge officers for potential excessive tank sloshing risk with enough time to change course or speed and to provide guidance in choosing the most efficient mitigation action. GTT collaboration with StormGeo can also develop sloshing impacts monitoring systems which can be used at sea to monitor real time sloshing activity in the tanks and check the efficiency of mitigating action. Based on GTT’s expertise on statistical sloshing data analysis and Seaware ERL monitoring/recording capacities, post voyage analysis can also be performed, enabling fleet management constant improvement.

“Seaware EnRoute Live is the most advanced onboard weather and ship routing product suite in the market,” states Kent Zehetner, CEO of StormGeo. “The addition of the sloshing prediction program will add significant value for our LNG clients by improving safety during the voyage. We measure success through the number of risks we enable our clients to avoid.”

Philippe Berterottière, CEO of GTT adds, “Our expertise in LNG shipping technology and StormGeo’s dominance in the weather services market make this partnership a natural fit for GTT. Sloshing prediction modules are the next step in ensuring the safest possible sea crossing for our LNG customers.”


StormGeo is a global weather services provider with operations in Offshore, Renewables, Media, Corporate Enterprise and Shipping industries. As one of the world’s largest commercial weather service providers, it serves a worldwide customer base with advanced solutions through its 24/7 forecasting desks. Seaware EnRoute Live is a StormGeo software product that provides shippers with crucial data relating to their cargo, sea conditions, and weather risks along the voyage.

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GTT records its first « bunkering » order

GTT membrane technology has been selected by STX France to fit out PEGASIS (Power Efficient GAS Innovative Ship), the new environmental ferry propelled with LNG (Liquefied Natural Gas), ordered by Brittany Ferries.

This innovative vessel will use GTT Mark III insulation system and will be built in Saint-Nazaire, in France. It should be delivered by the end of 2016.

In addition, GTT has also been selected to design the tanks of three other Brittany Ferries ships to be converted to LNG propulsion.

This order has arrived within the context of new European regulations, relating to sulphur oxide emissions, which strongly incites ship-owners to consider using less polluting fuels. With this prospect, propulsion with LNG represents one of the most competitive methods in order to respect the objectives of reducing emissions imposed by these new regulations.

Moreover, the membrane technology developed by GTT for LNG propulsion offers the ship-owners many advantages of optimization of space and cost.

Philippe Berterottière, Chairman and CEO of GTT declared: “This order marks the entrance of GTT into the new field of LNG bunkering, and demonstrates once again our clear expertise in the LNG industry. GTT is perfectly positioned to accompany its ship-owner customers during the industry-wide evolution towards more environmental ships.”

GTT signs license agreement with Keppel Singmarine for membrane containment systems for LNG carriers

On 8 January 2014, Gaztransport & Technigaz (GTT), world leader in the design of membrane containment systems for the maritime transportation and storage of Liquefied Natural Gas (LNG), and Keppel Singmarine, the specialised shipbuilding division of Keppel Offshore & Marine, signed a Technical Assistance and License Agreement for the design and construction of LNG carriers using GTT’s membrane containment systems.

The partnership between GTT and Keppel Singmarine will enable both companies to leverage each other’s expertise and experience in LNG technology and specialized shipbuilding to cater to the world’s demand for optimised, innovative and high quality LNG carriers.

The demand for LNG is growing tremendously worldwide, in particular Southeast Asia, where Singapore is aiming to be a hub for LNG bunkering and regional LNG distribution. Small scale oil and gas networks are also considering the supply of LNG to remote markets such as small islands in Indonesia, while the use of LNG as a fuel for ship, road and rail transport is getting more and more widespread. With an increasing demand for LNG, there will be a need for more small to medium scale LNG carriers and bunker ships to support the LNG industry. “GTT has a long standing and strong relationship with Keppel Offshore & Marine. Today, we have passed a new milestone and I am pleased to count Keppel Singmarine as a new GTT partner from the Keppel Offshore & Marine Group. This agreement will enable Keppel Singmarine to propose GTT solutions in the design and construction of LNG carriers and is a major landmark in the long and successful partnership of GTT with Singapore”, declared Mr. Berterottière, GTT Chairman and CEO.

Mr. Hoe Eng Hock, Managing Director of Keppel Singmarine, said, “We are pleased to enter into this win-win partnership with GTT which will allow us to incorporate GTT’s innovative solutions in designing and building of LNG carriers for the LNG market.  With an established track record of delivering some 400 specialised vessels, we understand the need of the market for quality and safe solutions, and we are confident our partnership with GTT will help us meet this market requirement.

Keppel Singmarine is capable of designing and building a wide spectrum of vessels, spanning from Anchor Handling Tug/Supply vessels, Multi-Purpose Offshore Support vessels and tugboats to highly advanced solutions such as icebreakers and ice-class support vessels.

With more than 70% of the world LNG carrier fleet equipped with membrane technologies, GTT systems have become the technology of choice for new LNG carrier orders and offshore applications. GTT proposes also a whole range of services for supporting the owners throughout the lifespan of their vessels.

Southeast Asia LNG GTT membrane land storage tank construction for EWC is progressing well

GTT is pleased to announce that the construction of the two LNG storage tanks ordered by EWC in Southeast Asia is progressing.

In 2009 and 2011, Energy World Corporation (EWC) and GTT signed two contracts for Land storage tank construction in Indonesia and the Philippines, to be equipped with GTT’s GST® Membrane Full Integrity System. For both projects, GTT supervises the detailed design of the storage tank containment systems, provides technical assistance on site during the containment systems installation and will assist the Operator during the whole tank life.

The first project between EWC and GTT is the Sengkang LNG site development project, in Keera, province of South Sulawesi in Indonesia. So far, the base slabs are completed and the slip form equipment which will erect the wall of the 88.000m3 tank is being assembled.

The second project of a 130.000m3 LNG storage tank is being built for LNG Hub Terminal on Pagbilao Grande Island, Quezon Province, in the Philippines. Base slab construction is completed and slip form equipment is ready for the construction of the walls.

Stewart W. G. Elliott, Chairman, Managing Director and Chief Executive Officer of EWC, explained that it is a significant construction step for the Philippines first LNG receiving terminal and for the Indonesian liquefaction plant.

Philippe Berterottière, President & CEO of GTT stated that these projects are significant first steps on the return of GTT membrane type land storage systems to the World market. These projects both benefit from the inherent cost and schedule advantages of the GTT design.

Press contact

+33 130 234 041 /

GTT receives the CWC LNG Technological Innovation Award for 2013

On the occasion of the World LNG Summit held in Paris on November 18th-21st 2013, GTT was awarded the LNG Technological Innovation Award 2013 by CWC for its work on the development of its membrane containment systems to reduce the daily Boil-Off in LNG Carrier tanks.

The LNG Technological award rewards an active member of the LNG industry, a company that has made a positive commercial or technical contribution to the LNG production, transportation or regasification over the years through commercial innovation and creativity.
This award was presented to GTT in recognition of its improved membrane type containment systems for LNGC which have reduced significantly the amounts of daily cargo evaporation (Boil-Off) by up to 40%. This gives owners more flexibility by enabling them to reduce speed and divert deliveries without loss of cargo.
The Award was presented by Mr. Brian Haggerty of Woodside energy Ltd. to Philippe Berterottière, GTT Chairman and CEO, who declared: “We are honored by this award which recompenses all the talents and efforts of the GTT innovation and technical teams, not only recently but also during the last fifty years.”

Press contact
+33 130 234 803  /

GTT participation at NEVA 2013

Every two years, St. Petersburg is the place to be for stakeholders involved in the Russian maritime industry.

The NEVA exhibition provides a unique opportunity to meet the shipping, shipbuilding and offshore energy top executives during four days of intensive technical and business meetings.

GTT, the expert in LNG containment systems, will, for the third consecutive event, present its membrane technologies on booth 714/6 – hall 7, once again demonstrating its commitment to the Russian market.

GTT supports the current offshore and onshore projects in Russia: Yamal LNG, Vladivostok LNG, Sakhalin expansion, etc.

The GTT Mark III membrane also equipped the four tanks of the Ob River, the first ship of its kind to have sailed across the Arctic NSR during winter. In order to respect new international requirements, GTT innovates constantly to propose solutions for the whole LNG chain: use of LNG as a fuel for commercial vessels, small and mid scales LNG vessel, etc.

On September 25th, GTT was happy to welcome its partners to its booth for a networking cocktail.

Press contact

+33 130 234 803  /

GTT North America

In order to tap the global LNG market opportunities, GTT is opening a subsidiary in Houston. The inauguration of the new office will take place on September 13th in the Omni Houston Galleria Hotel.

GTT is moving with the LNG global demand growth. LNG has become an alternative and an efficient energy as a marine fuel, less polluant than HFO and potentially less costly than other alternatives. In this context, to serve new market opportunities as well as strengthening its relationship with North American LNG market as a whole, GTT has opened GTT North America.

The new subsidiary based in Houston will concentrate on the use of LNG as a marine fuel for commercial vessels. This will require the design and construction of small scale LNG carriers or bunker barges, small scale LNG storage tanks and LNG fuel tanks for larger commercial vessels.

The Houston team has been assigned the task of promoting technologies, applications and GTT services and to place

GTT as a legitimate and essential player in the LNG fuel tank market with ship-owners, operators and engineering companies.

The Houston new office will be 5 000 miles away from GTT office in Saint Rémy-lès-Chevreuse (France), but will remain close the  GTT company vision of permitting access to more people both safely and economically to a clean energy. The official inauguration ceremony of the new office will take place in September 13th to Omni Houston Galleria Hotel. This event will bring together decision makers from the whole of the maritime industry.

In addition, in order to provide more knowledge about GTT membrane technologies, GTT will be holding seminars in Norfolk, New Orleans and Houston from 9th to 13th September.

 Presse contact

+33 130 234 803  /

Acciona Engineering and GTT sign a license agreement for the construction of cryogenic liquid onshore tank using GST® membrane full integrity system

On September 05th 2013, Acciona Engineering and GTT signed a License Agreement for the design and construction of the GST® Membrane Full Integrity system.

Acciona is a major Spanish contractor delivering EPC projects for the power and the Oil&Gas industry.

Pablo Garcia-Arenal Rodriguez – Managing Director Industrial Infrastructure of Acciona Engineering declared on this occasion: “We believe GST®Membrane Full Integrity system is a smart technology that brings cost & schedule advantage without compromising safety. We strongly intend to offer it for upcoming LNG projects. GTT is a key partner in the LNG field and we are very proud to become a GTT licensee.”

Philippe Berterottière – President & CEO of GTT declared: “We are also proud to have Acciona as a GTT licensee for the construction of the GST® Membrane Full Integrity system. The global presence of Acciona, and especially in Australia, Canada and Latin-America, where Acciona is involved in large scale infrastructure projects should enhance both companies’ market position. The main advantages of the GST® Membrane Full Integrity system for land storage tank applications will enable Acciona to offer the full scope for the LNG tank, and therefore enlarge global business opportunities.”

HYPROC and GTT renewed their Technical Service Agreement after more than 40 years of close collaboration

Since 1971 HYPROC has been operating membrane type LNG Carriers after undertaking the first commercial voyage of LNG Carrier Hassi R’mel. In 1990, Hyproc represented by Techinical Manager Mr Mokrane Yataghene (who occupied later on the position of Executive VP at GTT) and GazTransport represented by Mr Pierre Jean signed a Technical Service Agreement. GTT has always been available to support HYPROC whenever they request, notably during ship surveys. On 3rd of July 2013, in the presence of Mr Pierre Jean and Mr Mokrane Yataghene, Hyproc’s Marine operation Manager Mr Hocine Boudia (on behalf of HYPROC President Mr Smain Ghomri) and GTT President & CEO Mr Philippe Berterottière have renewed the Technical Service Agreement in order to confirm the continuous friendship and strong corporation between the two companies. Today HYPROC operates 7 LNG carriers of GTT membrane type.

GTT receives Best Paper Award from ISOPE conference

For the second time in three years, ISOPE rewarded Laurent Brosset, Technical Expert in the Liquid Motion Department at GTT, with the Best Paper Award, for his contribution to the article  “Elementary Loading Processes (ELP) involved in breaking wave impacts: findings from the Sloshel project”.

The International Society of Offshore and Polar Engineers (ISOPE) gathers every year hundreds of engineers and researchers for a conference composed of several symposia mostly related to marine engineering.
ISOPE is one of the most important technical conferences, along with OMAE, on this domain. What makes it particular is its special symposium dedicated to sloshing.

GTT has participated actively in every conference since the first one including a sloshing symposium, which was held in Osaka in 2009.

Each conference ends with a rewards ceremony, including the best conference paper of the previous year. On July 3rd, this prize was awarded to Wim Lafeber (MARIN), Hannes Bogaert (MARIN) and Laurent Brosset in Anchorage (AK, USA). The paper was selected from a total of 645.

“Elementary Loading Processes (ELP) involved in breaking wave impacts: findings from the Sloshel project” shows that all wave impacts generate loads in time and space domains, which are always made of the 3 same elementary components (Elementary Loading Processes or ELPs). This result is illustrated thanks to experimental data (mostly pressure measurements and synchronized high speed videos recording the shape of the waves during impacts) obtained during wave impact tests in the Delta flume of Deltares (NL), at the time of the Joint industrial Project Sloshel.

The first ELP appears at the first contact point between the free surface and the wall. It is related to the propagation of a pressure wave throughout the liquid. The second ELP basically corresponds to the hydrodynamic load. The third ELP is associated to the gas compression either when the gas escapes during the wave approach or when it is entrapped in pockets in between the liquid and the wall.

This decomposition of the loads due to liquid impacts helps understanding the scaling effects, which is essential in the study of sloshing essentially based on small scale model tests.

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