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Wärtsilä and Maersk develop solution to prevent scrubber discharge pipe corrosion

‘Pipe in pipe’ solution is designed to solve corrosion problems associated with open-loop scrubber washwater discharge; majority scrubber systems installed are of open-loop configuration.
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Technology group Wärtsilä and Danish ship operator A.P. Moller – Maersk have developed a unique ‘pipe in pipe’ solution for preventing corrosion in scrubber discharge pipes, according to Wärtsilä on Friday (2 September). 

The permanent in-pipe solution is designed to solve corrosion problems associated with open-loop scrubber washwater discharge.

According to Wärtsilä, the majority of the estimated 5,000 scrubber systems installed across the global fleet are of open-loop configuration. With this system, seawater is used to scrub SOx from the exhaust gas, with the used water then being discharged back to the sea after cleaning. 

Under IMO Guidelines, the washwater from exhaust gas cleaning systems, commonly referred to as scrubbers, should have a pH of no less than 6.5. However, in reality the pH of scrubber washwater is typically acidic, prior to being diluted by seawater. This creates the risk of structural corrosion to the discharge pipes. 

The risk is particularly high for pipes made of mild steel. In some cases, if the discharge pipes are inadequately protected, severe corrosion can damage the surrounding mild steel hull plates, resulting in water ingress.

The new ‘pipe-in-pipe’ solution allows for the original overboard pipe to remain in situ while a new glass reinforced epoxy (GRE) pipe is inserted into it. No metal cutting or welding is necessary. A SMO steel sleeve is inserted between the new GRE pipe and the existing steel pipe. An adhesive permanently secures the GRE pipe in place. Since this ‘pipe-in-pipe’ solution has a small impact on the internal diameter of the pipe, it is best suited for overboard pipes with a diameter greater than 300 mm.

“This is a long-term solution that can be planned for at any time, even if corrosion has not yet occurred. The component pipes can be prepared and stored either on board or at an engineering facility ready for fitting either during a scheduled drydocking or port-call or, if necessary, whilst afloat and in operation using a cofferdam at a convenient time and location” explained William Winters, Managing Director of Wärtsilä Underwater Services. 

“This in-operation repair offers substantial overall savings to the ship owner and allows the vessel to stay in service.”

“We have noted corrosion incidents occurring on some scrubber equipped vessels and wanted to be proactive in solving the problem,” said Jorn Kahle, Senior Lead Specialist, Maersk. 

“Additionally, taking a vessel out of service is extremely costly. One of the key driving forces for development of this pipe-in-pipe concept with Wärtsilä Underwater Services is to minimise these disruptions and costs. We are happy to offer this unique cost-efficient service to any vessel with any make of scrubber”.

Installations of the patented solution and licensed know-how will be carried out by Wärtsilä Underwater Services. In most cases, the repair will be completed in less than two days, which can avoid the ship having to go ‘off hire’. Considerable time and cost savings compared to alternative repair solutions have already been demonstrated.

The Wärtsilä/Maersk solution is intended for long-term protection. It reduces complications associated with welding work required on pipes and sometimes hull plates, particularly in underwater repair situations.

 

Photo credit: Wärtsilä
Published: 5 September, 2022

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Ofiniti eBDN solution chosen by FincoEnergies for marine biofuel ops in ARA region

Development takes place on the back of complex logistics and opaque operational processes experienced by the marine (bio)fuel market; which Ofiniti’s FuelBoss eBDN solution seeks to simplify.
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June 17, 2025

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FincoEnergies MT

Rotterdam-based FincoEnergies, an independent, leading supplier of (bio)fuels and decarbonisation services for the transport sector, will be adopting Ofiniti’s FuelBoss eBDN technology, with operational support from VT Group.

The development takes place on the back of complex logistics and opaque operational processes experienced by the marine (bio)fuel market; which Ofiniti’s FuelBoss eBDN solution seeks to simplify.

“Schedules are becoming increasingly tighter as demand for sustainable biofuels grows,” explains Leon Arets, Trading & Operations Director at FincoEnergies.

“We’re adopting a platform that enhances structure and responsiveness. This digital leap allows us to not only scale efficiently but also deliver greater transparency and operational excellence to our clients.”

A spin-off from global assurance and risk management leader DNV, Ofiniti brings together deep industry know-how with cutting-edge technology. Its flagship platform, FuelBoss, is designed to replace cumbersome manual processes with streamlined digital workflows that boost efficiency and data reliability.

“Our work with LNG suppliers laid the groundwork,” notes Oliver Brix Sparsø, Global Director of Sales at Ofiniti. “But this collaboration with FincoEnergies and VT Group marks the first large-scale commitment to digital delivery workflows for biofuels. It’s a turning point for the region.”

FincoEnergies’ mission, Decarbonising the transport industry together, is grounded in collaboration and innovation. The partnership with Ofiniti and VT Group exemplifies this spirit, combining technological leadership with operational expertise.

“As operators, we continuously look for ways to improve life on board and support our partners,” adds Wouter van Reenen, Business Development Manager at VT Group. “FuelBoss is a strong fit for our operations and those of our chartering clients.”

Related: Ofiniti to digitalise Azane ammonia bunkering operations across Scandinavia
Related: Ofiniti to roll out e-BDNs for Golden Island methanol bunkering operations in Singapore
Related: Global Fuel Supply to adopt FuelBoss by Ofiniti for e-BDN in West Africa
Related: Ofiniti appoints Oliver Brix Sparsø as new Global Director of Sales
Related: Ofiniti acquires Singapore-based Angsana Technology to advance digital bunkering solutions
Related: Singapore: FuelBoss by Ofiniti becomes sixth whitelisted e-BDN solution
Related: Digital bunkering platform Ofiniti successfully spun out from DNV
Related: FuelBoss to continue under new DNV company Ofiniti

 

Photo credit: Ofiniti
Published: 17 June 2025

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Business

China: Shanghai Zhongran and PetroChina Shanghai Port to promote bunker fuel blending business

Development will help improve Shanghai Port’s bonded ship fuel supply industry, noted the Shanghai Customs Inspection Office.
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23 hours ago

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June 17, 2025

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Shanghai Zhongran and PetroChina Shanghai Port meeting

A meeting between representatives of Shanghai Zhongran, Shanghai Port Energy, PetroChina Shanghai Port, and Hongkou Customs took place at the Shanghai Customs Inspection Office on Thursday (12 June).

According to Shanghai Zhongran, the meeting’s objective was to discuss the implementation of a high-sulfur and low-sulfur fuel blending business at Shanghai.

During the meeting, a member of the Shanghai Customs Inspection Office stated it will take the opportunity of PetroChina Shanghai Port to carry out this business to promote the development of enterprises in Hongkou District.

The development will improve the utilisation rate of Shanghai Zhongran bonded storage tanks, improve storage functions, and help improve Shanghai Port’s bonded ship fuel supply industry.

After the meeting, PetroChina Shanghai Port submitted a formal application to Hongkou Customs.

Moving forward, Hongkou Customs will formulate a reconciliation plan, open a special account book, and promote the implementation of this business.

 

Photo credit: Shanghai Zhongran
Published: 17 June 2025

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NYK Group’s first methanol-fuelled bulk carrier “Green Future” delivered

Vessel is the first bulk carrier in the NYK Group to be equipped with a dual-fuel engine that uses methanol and fuel oil.
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23 hours ago

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June 17, 2025

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Green Future MT

NYK Group on 13 May received delivery of Green Future, the company’s first methanol dual-fuel bulk carrier, at the TSUNEISHI Factory of TSUNEISHI SHIPBUILDING Co., Ltd. where a naming and delivery ceremony was also held, it said on Thursday (14 June).

The vessel will be chartered by NYK Bulk & Projects Carriers Ltd., an NYK Group company, from KAMBARA KISEN Co., Ltd.

It is the first bulk carrier in the NYK Group to be equipped with a dual-fuel engine that uses methanol and fuel oil.

“Methanol has a lower environmental impact than fuel oil, and by using bio-methanol and e-methanol produced using hydrogen derived from renewable energy sources and recovered carbon dioxide, the vessel achieves significant reductions in greenhouse gas emissions,” it said.

Vessel Particulars
LOA: 199.99 m
Breadth: 32.25 m
Depth: 19.15 m
Deadweight: approx. 65,700 metric tons
Capacity: approx. 81,500 m3
Draft: 13.8 m

Related: Tsuneishi delivers world’s first methanol dual-fuel Ultramax bulker to NYK
Related: Japan: NYK to time-charter its first methanol-fuelled bulk carrier

 

Photo credit: NYK Group
Published: 17 June 2025

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