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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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Biofuel

China Shipping & Sinopec Suppliers completes first biofuel bunkering op of passenger ship in Dalian

Firm successfully refuelled passenger ship “Chang Shan Dao” owned by Cosco Shipping Ferry with B24 bio bunker fuel on 29 November at Dalian Cruise Port.

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China Shipping & Sinopec Suppliers completes first biofuel bunkering op of passenger ship in Dalian

China Shipping & Sinopec Suppliers Co., Ltd. on Wednesday (29 November) successfully refuelled passenger ship "Chang Shan Dao" owned by Cosco Shipping Ferry Co., Ltd. with B24 bio bunker fuel at the Dalian Cruise Port. 

The occasion marked the first biofuel bunkering operation for passenger ships in China. 

The B24 biofuel oil used was blended with 24% biofuel and 76% conventional low-sulphur fuel oil.

Sinopec China Shipping Fuel Supply, which is responsible for the bunkering operation, is a bunker supply firm jointly established by Sinopec Group and COSCO Shipping Group.

According to Li Zhi, Deputy Party Secretary and Deputy General Manager of China Shipping & Sinopec Suppliers Co., Ltd., the biofuel bunkering business is another step in the company's active business of the group's development strategy. 

The bunkering operation after the firm completed the first bonded biofuel bunkering operation of a domestic ship on 7 September. 

Disclaimer: The above article published by Manifold Times was sourced from China’s domestic market through a local correspondent. While considerable efforts have been taken to verify its accuracy through a professional translator and processed from sources believed to be reliable, no warranty is made regarding the accuracy, completeness and reliability of any information.

Photo credit: China Shipping & Sinopec Suppliers
Published: 8 December, 2023

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Alternative Fuels

Singapore, Tianjin to pilot and trial alternative bunker fuels following shipping corridor MoU

Singapore – Tianjin Green and Digital Shipping Corridor will serve as a valuable testbed for both countries to pilot and trial digital solutions, alternative fuels and technologies, amongst others.

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Singapore, Tianjin to pilot and trial alternative bunker fuels following shipping corridor MoU

The Maritime and Port Authority of Singapore (MPA) and the People’s Republic of China’s Tianjin Municipal Transportation Commission on Wednesday (6 December) signed a memorandum of understanding (MoU) to establish the Singapore – Tianjin Green and Digital Shipping Corridor.

Mr Teo Eng Dih, Chief Executive, MPA, and Mr Wang Zhinan, Director General, Tianjin Municipal Transportation Commission, signed this MoU.

The MoU marked the first Green and Digital Shipping Corridor established between Singapore and China to support the decarbonisation, digitalisation and growth of the maritime industry between Singapore and the Bohai Region. 

The Singapore – Tianjin Green and Digital Shipping Corridor will serve as a valuable testbed for both countries to pilot and trial digital solutions, alternative bunker fuels and technologies, and facilitate talent development to support the decarbonisation and digitalisation of shipping. 

Singapore and Tianjin will work with the research community, the  institutes of higher learning, and industry stakeholders such as shipping lines, port operators, shipbuilders, classification societies, and bunker suppliers to enable more efficient port clearance through digital exchanges, encourage the offtake of zero or near-zero greenhouse gas emission fuels and adoption of new fuel technologies, spur innovation and support the growth of the maritime startups community, and facilitate manpower training and professional development.

The establishment of the Singapore – Tianjin Green and Digital Shipping Corridor reaffirms the strong commitment by Singapore and Tianjin to accelerate maritime decarbonisation and digitalisation. Singapore will also be exploring the establishment of similar collaboration with other maritime and port ecosystems within China.

Photo credit: Maritime and Port Authority of Singapore
Published: 8 December, 2023

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Decarbonisation

Report highlights routes-based action plan methodology to accelerate uptake of clean bunker fuels

NextGEN Connect-GreenVoyage2050 collaboration, which includes Singapore, emphasises the important role of regional energy hubs in enabling the inclusive adoption of clean marine fuels.

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Report highlights routes-based action plan methodology to accelerate uptake of clean bunker fuels

The Maritime and Port Authority of Singapore (MPA) on Thursday (7 December) said the NextGEN Connect-Green Voyage2050 Project identified a key role for regional hubs to help connect large demand clusters and remote locations, with regional fuel supply sources, in order to enable a more inclusive and effective transition to a low-carbon maritime future. 

The project is a collaboration between Singapore, Norway and the International Maritime Organization (IMO). 

These findings were unveiled in the Lloyd’s Register Maritime Decarbonisation Hub (LR MDH) report titled Routes-based Action Plans: A Toolkit launched at the Voyage to Net-Zero Forum, which was organised by MPA, at the 28th United Nations Climate Change Conference (COP28/CMP8/CMA5) yesterday.  

The report was developed following a workshop discussion that was held from 5 to 6 October 2023 in Singapore, with the participation of 40 stakeholders representing ports and National Administrations across Asia, based on the concept of the LR MDH’s First Movers Framework for green corridors. The workshop simulated the process steps of the routes-based action plan methodology, addressing the limitations in its application in the wider Asian context. Additional engagements with stakeholders from the Pacific are envisaged to further refine the methodology. 

“One of the key findings in our report highlighted the varying pace of decarbonisation efforts across the Asian region and the need for regional coordination among governments to establish energy clusters that will serve both as demand centres and energy producing hubs” said Charles Haskell, Director at LR MDH. 

The creation of energy producing hubs includes defining a strategy that brings together demand from different countries at different developmental stages across the region to build up investment cases for implementing energy infrastructure at scale, all the while taking into consideration the economic and social benefits for local communities. 

The report also emphasised that routes-based action plans should be steered by national governments to give confidence to the industry’s infrastructure investment decisions, with development banks and regional funds needing to play a part to help tailor financing solutions to support infrastructure development. 

“If we truly want to achieve a net-zero future where no one is left behind, we cannot focus only on existing first mover initiatives. We must also study locations where the energy infrastructure is still in its infancy”, added Charles Haskell. 

Essential to driving the implementation of routes-based action plans, as highlighted in the report, is the pooling of resources and capacity building to develop the business case for building the necessary infrastructure for regional hubs that include Least Developed Countries (LDCs) and Small Island Developing States (SIDS). This will require regional coordination and collaboration involving governments and all stakeholders across the maritime supply chain.

Mr. Teo Eng Dih, Chief Executive of MPA, said: “As we steer toward a sustainable maritime future, fostering a collective and inclusive approach is imperative in the development of green corridors and the energy transition to decarbonise international shipping.”

“The NextGEN Connect-GreenVoyage2050 collaboration emphasises the important role of regional energy hubs in enabling the inclusive adoption of clean marine fuels, particularly for LDCs and SIDSs. MPA looks forward to continuing its collaboration with IMO, Ministry of Climate and Environment of Norway and LR MDH to pilot solutions to reduce GHG emissions from ships and drive innovative transformations in the maritime industry.”

Sveinung Oftedal, Chief Negotiator of the Norwegian Ministry of Climate and Environment, said: “Separate routes for emission-free ferries and ships can play an essential role in stimulating early action to adopt zero or near-zero emission technologies and fuels, and hence are an important step towards decarbonising shipping. There is currently a significant volume of maritime traffic between Asian countries, and our workshop was a great forum to discuss opportunities the decarbonisation of maritime shipping can bring and how efforts can be linked to countries’ wider energy transition.”

Jose Matheickal, IMO Director of Partnerships and Projects, said: “Supporting developing countries, including SIDS and LDCs, in their efforts to implement the 2023 IMO Strategy on the Reduction of GHG Emissions from Ships is imperative to the decarbonisation of the maritime sector. IMO is pleased to provide, through this collaboration, practical support around the development and subsequent implementation of National Action Plans and route-based actions in line with IMO’s MEPC RESOLUTION.366(79) that encourages Member States to undertake these voluntary actions to facilitate the achievement of greener shipping and reduced emissions.” 

Note: ‘Routes-based action Plans: a toolkit’ can be found here

Photo credit: Maritime and Port Authority of Singapore
Published: 8 December, 2023

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