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DNV awards AiP for new LNG marine fuel tank insulation with leak detection system

‘The pandemic has been challenging for many companies and for the development of this particular design,’ says Svein Konradsen, COO of PASSER Marine AS.

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Classification society DNV on Tuesday (4 May) granted an Approval In Principle (AIP) to PASSER Marine for the development of a new LNG fuel tank insulation system.

The new concept is designed for prismatic ‘type B’ LNG tanks – which according to IMO rules require a partial secondary barrier – and includes a leakage detection system capable of safely managing and containing fuel leaks.

“The system we have developed is cost-effective and production-friendly,” said Svein Konradsen, COO of PASSER Marine AS.

“The pandemic has been challenging for many companies and for the development of this particular design.

“The required testing has been difficult to finalize due to testing interruptions and limited possibilities to travel, but finally we have been able to submit the necessary documentation which I am very pleased to say was accepted by DNV.”

As LNG fuelled vessels are increasingly being deployed for deep-sea shipping, fuel tank sizes need to increase from 300-1000 m3 fuel capacity to up to 10,000-20,000 m3 which leaves less room for cargo.

As such, there is increased industry interest in alternative fuel tanks – known as ‘type B’ – which are prismatic in shape and more volume efficient than traditional cylindrical ‘type C’ tanks. Between 95 and 99% of LNG fueled ships contain type C fuel tanks, but many newbuilds on order contain ‘type B’ specifications.

“There are several insulation concepts under development that provide an integrated secondary barrier and leakage detection system, but there are few proven systems available on the market,” said Monika Johannessen, DNV Maritime Head of Department, Gas Carrier Excellence Centre.

“We are pleased that PASSER Marine has chosen DNV to pursue verification for this innovative concept and look forward to receiving the documentation for full approval.”

Note: An AiP is widely recognized in the industry as an early phase verification level for new design concepts or for existing designs in new applications. An AiP issued by DNV is an independent assessment of a concept according to an agreed requirement framework within DNV Rules, notations and regulations for which DNV is authorized to carry out third part verification, confirming that a design is feasible and that no major obstacles would prevent the concept from being realised. 

 

Photo credit: PASSER Marine
Published: 5 May, 2021

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LNG Bunkering

Singapore: FueLNG achieves 800th LNG bunkering operation milestone

Bunker tanker “FUELNG Venosa” delivered LNG marine fuel to bulk carrier “MV Ubuntu Humanity” at Eastern Bunkering A Anchorage (AEBA) on 11 July.

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Singapore: FueLNG completes 800th LNG bunkering operation

Singapore’s licensed LNG bunker supplier FueLNG on Friday (17 July) announced the successful completion of its 800th LNG bunkering operation in the republic.

The company said bunker tanker FUELNG Venosa delivered LNG marine fuel to bulk carrier MV Ubuntu Humanity at Eastern Bunkering A Anchorage (AEBA) on 11 July. 

“This achievement is more than just a number,” FueLNG said.

“It reflects the trust our customers place in us, the dedication of our operations team, the professionalism of our marine partners, and our unwavering commitment to safe, efficient, and reliable bunker deliveries.” 

Manifold Times previously reported FueLNG completing its 500th LNG ship-to-ship (STS) bunkering operation.

Related: Singapore: FueLNG achieves milestone of 500th STS LNG bunkering operation

 

Photo credit: FueLNG
Published: 20 July, 2026

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Methanol

Western Baltic Engineering unveils green methanol bunkering vessel design for Klaipėda

Designed for flexible operations in shallow waters and local bunkering routes, the concept features an 800-metric-tonne green methanol capacity and the potential to supply up to 250,000 mt annually.

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Western Baltic Engineering unveils green methanol bunkering vessel design for Klaipėda

Ship design and engineering service provider Western Baltic Engineering on Thursday (16 July) showcased its latest concept design for a green methanol bunkering vessel, developed for the operational needs of the Port of Klaipėda.

Designed for flexible operations in shallow waters and local bunkering routes, the concept features an 800-metric-tonne green methanol capacity and the potential to supply up to 250,000 metric tonnes (mt) annually. 

“It is Western Baltic Engineering’s first concept dedicated exclusively to green methanol bunkering, expanding our portfolio of alternative-fuel vessel solutions,” the company said in a social media post.

“Building on our experience in methanol-ready vessel design, it reflects our continued focus on enabling the industry’s transition to cleaner fuels.”

“As the maritime sector evolves, engineering companies have a responsibility not only to respond to market needs but also to anticipate future challenges,” said Marius Arkusauskas, Director at Western Baltic Engineering.

“By exploring emerging technologies and alternative fuel applications, we help our partners prepare for the next generation of maritime operations while contributing to a more sustainable future.”

 

Photo credit: Western Baltic Engineering
Published: 20 July, 2026

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Alternative Fuels

Repsol and Maersk wrap up first bioethanol bunkering operation in Port of Barcelona

Repsol supplied 2,800 mt of bioethanol to a Maersk container vessel, “Antonia Maersk”, in the first bunkering operation of its kind in the Port of Barcelona and one of the first in the Mediterranean.

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Repsol and Maersk wrap up first bioethanol bunkering operation in Port of Barcelona

Spanish energy company Repsol and shipping giant A.P. Moller – Maersk (Maersk) completed the first bioethanol bunkering operation in the Port of Barcelona, according to the port authority on Wednesday (15 July). 

Repsol successfully supplied 2,800 metric tonnes (mt) of bioethanol to a Maersk container vessel, Antonia Maersk, in the first bunkering operation of its kind in the Port of Barcelona and one of the first in the Mediterranean. 

The operation demonstrates growing demand for alcohol-based marine fuels, as well as the readiness of the infrastructure, logistics, and operational capabilities required to support their deployment at commercial scale. 

Juan Abascal, Repsol’s Executive Managing Director of Industrial Transformation and Circular Economy, said: “With this supply, we reaffirm our commitment to the decarbonization of maritime transport through solutions that are available today and ready to scale in the future. 

“At Repsol, we provide shipping companies with a reliable supply chain and a multi-energy strategy that combines different renewable fuels to support the sector in a safe, competitive, and sustainable transition.”

The supply took place in the Port of Barcelona under fully commercial conditions, bringing together key players across the maritime value chain and demonstrating how collaboration can accelerate the adoption of lower-emission solutions in shipping. 

The delivery was carried out by Bahía Candela, Repsol’s newest bunker vessel, operated by Mureloil and designed to supply both conventional marine fuels and next-generation energy products. 

During the bunkering operation, Bahía Candela operated using its battery system, enabling the fuel transfer to be completed with zero local emissions, and further reducing the environmental footprint of the operation. 

Prior to the bunkering, Maersk tested ethanol on one of its smaller vessels, the 1,800 TEU feeder vessel Laura Maersk, which in 2023 became the world’s first dual-fuel container vessel able to operate on methanol. Today, Maersk has 23 dual-fuel container vessels designed to operate on methanol; however, the company continues to explore ethanol as an alternative fuel for its methanol-enabled vessels. Laura Maersk has performed sailings on 100% ethanol as well as blends of ethanol and methanol. 

Emma Mazhari, Vice President Energy Markets at Maersk, said: “Following the successful ethanol trials conducted on Laura Maersk, this latest bunkering of Antonia Maersk marks another important step in our efforts to explore scalable low-emission fuel solutions. 

“As the first ethanol trial on one of our large dual-fuel vessels, with a capacity of 16,000 TEU, it allows us to deepen our understanding of ethanol’s operational potential at scale. 

“Building on the experience we have gained with methanol, we are working closely with port authorities and industry partners to develop the infrastructure and procedures needed to support ethanol bunkering. Ethanol is one of several pathways we are pursuing to diversify our future fuel portfolio and help accelerate the development of new, viable liquid marine fuel markets.”

 

Photo credit: Port of Barcelona
Published: 20 July, 2026

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