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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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Legal

Singapore withdraws remaining 127 charges against Hin Leong founder OK Lim

Lim Oon Kuin, also known as OK Lim, was issued a stern warning and a district court granted him a discharge amounting to an acquittal for these charges on 17 July.

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July 21, 2026

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RESIZED Sora Shimazaki on Pexels

Founder of collapsed oil trader Hin Leong Trading, Lim Oon Kuin, also known as OK Lim, has had the remaining 127 charges against him withdrawn, according to The Straits Times on Monday (20 July). 

OK Lim was issued a stern warning and a district court granted him a discharge amounting to an acquittal for these charges, including those for cheating, on 17 July. The discharge means Lim cannot be prosecuted again for the same offences.

Lim, 84, is currently serving a 13½-year prison sentence after the High Court reduced his original 17½-year jail term in March 2026. He was convicted in 2024 on two cheating charges and one count of abetting forgery in a case prosecutors described as one of Singapore’s most serious trade finance frauds.

Lim was convicted in May 2024 of two charges of cheating the Hongkong and Shanghai Banking Corporation (HSBC) and one count of abetting forgery that proceeded to trial out of a total of 130 criminal charges.

He was first charged in court on 14 August 2020, and was subsequently handed further charges in court on 25 September 2020, 30 April 2021 and 24 June 2021 for his role in perpetuating fraud on various financial institutions. 

A total of 130 charges were eventually brought against him for cheating and forgery-related offences.

Related: Singapore: Hin Leong Founder OK Lim gets jail term slashed to 13.5 years

 

Photo credit: Sora Shimazaki
Published: 21 July, 2026

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Winding up

Singapore: Coastal Logistics Pte Ltd to be wound up voluntarily

Coastal Logistics was reportedly affiliated with troubled Singapore bunker player Coastal Oil (Singapore) Pte Ltd.

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July 21, 2026

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RESIZED Drew Beamer

Several resolutions for Coastal Logistics Pte Ltd were made during an extraordinary general meeting held on 14 July, according to a notice in the Government Gazette on Friday (4 July).

The following resolutions were duly passed during the meeting:

As Special Resolution

  • That it has been proved to the satisfaction of the meeting that the Company cannot by reason of its liabilities continue its business and accordingly the Company be wound up voluntarily pursuant to Section 160(1)(b) of the Insolvency, Restructuring and Dissolution Act 2018 (No. 40 of 2018);

As Ordinary Resolutions

  • that Mr. Wong Pheng Cheong Martin and Ms. Koay May Yee, both care of FTI Consulting (Singapore) Pte Ltd, One Raffles Quay, #27-10 South Tower, Singapore 048583 be appointed as the joint and several Liquidators of the Company for the purpose of such winding up; and
  • that the Liquidators be at liberty to open, maintain and operate any bank account(s) or account(s) for monies received by them as Liquidators with such bank(s) as they deem fit; and
  • that a Committee of Inspection will not be formed.

Manifold Times previously reported Nicholas James Gronow, director of Heng Tong Fuels & Shipping and Coastal Logistics, filed statutory declarations for both companies stating the firms cannot continue their businesses due to liabilities.

Both companies were reportedly affiliated with troubled Singapore bunker player Coastal Oil (Singapore) Pte Ltd. 

In 2019, several vessels owned by both firms entered the sale & purchase (S&P) market in Singapore.

Related: Singapore: Director declares Heng Tong Fuels & Shipping’s inability to continue business
Related: Heng Tong Fuels & Shipping in court over DBS Bank bunker tanker loan
Related: Singapore: Bunker tanker “Coastal Neptune” arrested
Related: Heng Tong Fuels & Shipping, Coastal Logistics tankers enter S&P market

 

Photo credit: Drew Beamer
Published: 21 July, 2026

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LNG Bunkering

PIL’s LNG dual-fuel boxship “Kota Elok” arrives in Singapore on maiden call

As the first of 13 new 13,000 TEU vessels joining its fleet, Kota Elok is equipped to operate on LNG and low-sulphur fuel oil that helps reduce our greenhouse gas emissions.

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July 21, 2026

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PIL's LNG dual-fuel boxship “Kota Elok” arrives in Singapore on maiden call

Singapore-based Pacific International Lines Pte Ltd on Monday (20 July) said its first 13,000 TEU LNG dual-fuel container vessel, Kota Elok, recently made her maiden call to Singapore on 15 July.

As the first of 13 new 13,000 TEU vessels joining its fleet, Kota Elok is equipped to operate on liquefied natural gas (LNG) and low-sulphur fuel oil that helps reduce our greenhouse gas emissions. 

The vessel also incorporated energy-saving features and digital technologies to reduce fuel consumption and enhance operational performance, as well as a bow windshield to improve aerodynamics, contributing to improved fuel efficiency and lower emissions over the course of long-haul voyages.

“Following Singapore, Kota Elok will continue her voyage on our East Coast Service 1 (ES1) route to South America, calling at ports in Brazil, Uruguay, and Argentina before returning to Asia,” the company said in a social media post. 

Kota Elok also became PIL’s first vessel to receive Lloyd’s Register certification for compliance with the IACS UR E26 and UR E27 cyber security requirements.

Developed by the International Association of Classification Societies (IACS), UR E26 and UR E27 are mandatory cyber resilience requirements for newbuild vessels contracted from 1 July 2024. 

 

Photo credit: Pacific International Lines
Published: 21 July, 2026

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