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LNG Bunkering

GTT: Co-mingling of LNG bunkers from different sources ‘simply an operational issue’

LNG marine fuel does not suffer from various potential off spec and stability issues seen in marine fuel oil when mixed, confirms General Manager of GTT S.E.A.

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The co-mingling of liquefied natural gas (LNG) bunker fuel from different sources is safe and simply an operational issue, says the General Manager of GTT South East Asia.

Stephane Maillard confirmed the fuel composition of LNG is well-known throughout the world and the material does not suffer from potential off spec and stability issues seen in traditional marine fuel oil when mixed.

However, operators will need to be aware that different locations offer different quality of LNG (in terms of its methane number) and the additional of a new LNG bunker stem into an existing tank is expected to change when different

He was answering a question from Manifold Times on the side lines at The Impact of Maritime Digitalization on the Future of Shipping and LNG seminar organised by Ascenz Solutions on Thursday (17 January).

“You will find different LNG qualities [methane number] around the world and mixing them together is possible; it is just an operational question of how to avoid cold rollover,” he says.

“This is relative to the density of the LNG fuel or design of the tanks that allow LNG to be poured either from the top or the bottom [to avoid cold rollover]. Otherwise, there is totally no issue.”

A LNG cold rollover happens when two separate layers of different densities exist in a tank, according to the International Group of Liquefied Natural Gas Importers.

As the density of two layers approach each other, the two layers mix rapidly, and the lower layer which has been superheated gives off large amount of vapour as it rises to the surface of the tank.

The main hazard from a rollover incident is the rapid release of large amounts of vapour leading to potential over-pressurisation of the tank.

“It is common to get information of the LNG quality before any transfer operation [such as in a LNG bunkering operation] though quality in terms of methane number can change a little bit after bunkering,” informs Maillard.

“It is just the initial loading. If you still have a bit of LNG in the fuel tank and pour the new LNG bunker fuel stem inside the tank, chances of cold rollover are very low.

“But if the tank is half full and you want to top up, you have to be aware of a change in quality [methane number]; if there is very low volume of LNG bunkers in the tank initially then it is ok.

“The part which needs more attention will be the engines. Fortunately, it is common for LNG engines to be able to run effectively on a range of methane number.”

Photo credit: Ascenz
Published: 25 January, 2019

 

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LNG Bunkering

Singapore-based EPS takes delivery of three LNG dual-fuel bulk carriers

Three vessels are the third, fourth and fifth in the company’s series of 14 Newcastlemaxes being built at the yard, and were delivered five months ahead of their contracted delivery dates.

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Singapore-based Eastern Pacific Shipping (EPS) on Friday (4 September) announced the naming and delivery of three new LNG dual-fuel Newcastlemax bulk carriers from China’s Qingdao Beihai Shipbuilding. 

Cyril Ducau, CEO of EPS, said the vessels were named Mount Victoria, Mount Yulong and Mount Wuyi

The three vessels are the third, fourth and fifth in the company’s series of 14 Newcastlemaxes being built at the yard, and were delivered five months ahead of their contracted delivery dates.

“A big thank you to CSSC Group and Qingdao Beihai Shipbuilding, working alongside our EPS team, for the tremendous collaboration and commitment behind this achievement,” Ducau said in a social media post.  

 

Photo credit: Eastern Pacific Shipping
Published: 7 September, 2026

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LNG Bunkering

LR awards AiP to CSSC Huangpu Wenchong for 12,500 m³ LNG bunker vessel design

Vessel design incorporates Type C LNG cargo tanks and has been evaluated against a range of class notations covering gas operations, automation, environmental performance and cyber resilience.

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Classification society Lloyd’s Register (LR) on Thursday (3 September) said it has awarded Approval in Principle (AiP) to CSSC Huangpu Wenchong Shipbuilding Co., Ltd. for a new 12,500 m³ LNG bunkering vessel design.

The AiP was signed at SMM 2026 in Hamburg and confirms that the vessel concept has successfully completed an independent design assessment against LR’s latest classification requirements.

The new 12,500 m³ vessel design incorporates Type C LNG cargo tanks and has been evaluated against a comprehensive range of class notations covering gas operations, automation, environmental performance and cyber resilience.

LR’s assessment was carried out in accordance with its Rules and Regulations for the Classification of Ships and Rules and Regulations for the Construction and Classification of Ships for the Carriage of Liquefied Gas in Bulk.

Constantinos Chaelis, LR’s Global Gas Segment Director, said: “This project demonstrates the continued market confidence in LNG and the importance of building the supporting infrastructure that enables owners to make practical emissions reductions today, while maintaining flexibility for the future. Through early engagement between shipyard and class, we can accelerate the delivery of robust designs that meet both operational and regulatory requirements.”

A Huangpu Wenchong spokesperson, said: “This Approval in Principle from Lloyd’s Register validates the technical approach and provides a strong foundation for future development. We believe vessels of this type will play an increasingly important role in supporting the energy transition by helping ensure LNG is available where shipowners need it most.”

 

Photo credit: Lloyd’s Register
Published: 7 September, 2026

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Alternative Fuels

Yang Ming orders six LNG dual-fuel, ammonia-ready containerships from Hanwha Ocean

Each of the six new vessels will have a capacity of up to 13,650 TEU and feature LNG dual-fuel propulsion and Ammonia Fuel Ready specifications.

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Yang Ming orders six LNG dual-fuel, ammonia-ready containerships from Hanwha Ocean

Taiwanese shipping firm Yang Ming Marine Transport Corporation (Yang Ming) and South Korean shipbuilder Hanwha Ocean on Wednesday (2 September) signed a shipbuilding contract for six 13,000 TEU class LNG dual-fuel container vessels. 

The contract was signed by Dr. Chuck Tsai, Chairman of Yang Ming, and Mr. Charles Kim, CEO of Hanwha Ocean. The vessels are scheduled for delivery between 2028 and 2029. 

They will complement Yang Ming’s existing fleet of 10,000+ TEU vessels and serve as key vessels on East-West services, with deployment flexibility across trade lanes connecting Asia with the East and West Coasts of North America, South America, and the Mediterranean. 

Each of the six new vessels will have a capacity of up to 13,650 TEU and feature LNG dual-fuel propulsion and Ammonia Fuel Ready specifications.

“As Yang Ming transitions toward net-zero emissions, LNG provides a relatively mature and economically viable alternative fuel solution, capable of reducing greenhouse gas emissions by approximately 20%,” the company said. 

“At the same time, ammonia can serve as a carbon-free fuel by utilising converted LNG storage facilities, while offering relatively lower conversion costs and comparatively well-developed supply chains and infrastructure. The Ammonia Fuel Ready design will therefore provide Yang Ming with greater flexibility in responding to increasingly stringent international regulations on greenhouse gas emissions.”

In addition, the vessels will be equipped with Type B LNG fuel tanks with a design pressure of 1.0 bar to enhance the safety and efficiency of LNG operations, together with a range of energy-saving technologies, including Wind Shields, Rudder Bulbs, Pre-Swirl Stators, and Shore Power Systems. Smart ship technologies and cybersecurity protection features will also be incorporated to enhance operational efficiency, safety, and reliability while effectively reducing fuel consumption and greenhouse gas emissions.

Deliveries under Yang Ming’s next-generation fleet optimization plan commenced earlier this year. By 2030, a total of 24 new vessels are expected to enter service. 

This includes 18 LNG dual-fuel vessels—comprising five 15,500 TEU, seven 16,000 TEU, and the six 13,000 TEU vessels under this contract—alongside six 8,000 TEU methanol dual-fuel-ready ships. 

 

Photo credit: Yang Ming Marine Transport
Published: 4 September, 2026

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