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LINER SHIPPING MOVES TO WATER LUBRICATED SHAFTS

Tuesday, August 11, 2020 

The two Super Eco 2700 containerships which China’s Zhoushan Changhong Shipyard is building for Singapore-headquartered X-Press Feeders have launched with a complete water lubricated propeller shaft arrangement supplied by Thordon Bearings.

CY Engineering, Thordon’s distributor in China, completed the installation and commissioning of the Thordon scope of supply aboard X-Press Mekong (Hull Number CHB085) and X-Press Pearl (Hull Number CHB084). Both Maric-designed, DNV GL-classed vessels feature Thordon’s Compac propeller shaft bearings, bronze shaft liners, a Water Quality Package, ThorShield shaft protection coating and the company’s proprietary bearing condition monitoring system (BCM). Due for delivery later this year, the vessels were ordered in 2018 with options for an additional two plus two.

Sam Williams, Thordon Bearings’ Regional Manager for Asia and Greece said that X-Press Feeders, the world’s largest independent common carrier with a fleet of more than 110 Panamax vessels, specified the Thordon system after operating a Compac-installed vessel acquired two years ago under a Sale & Purchase agreement. “Based on their experience with the system installed aboard the 2018-built X-Press Kabru [formerly Washington Trader], which is based on the same Super Eco 2700 design, the owner specifically wanted the arrangement for its newbuilds. This is a testament not only to the success of the Maric design, but also to the environmental performance and cost-saving benefits of a water lubricated system,” said Williams. Indeed, a key factor in the shipowner’s decision to specify the arrangement was to further enhance a design already optimised for 'clean shipping'.

Williams said: “With a hull form designed for maximum fuel-efficiency and reduced emissions, the move away from an oil-lubricated shaft to a more environmentally acceptable solution was a significant motivation. The experience the owner had with X-Press Kabru proved the Compac system’s operational and environmental performance but also showed that long-term operational savings can be achieved with water lubricated tailshaft bearings. A very cost-effective alternative.”

X-Press Mekong and X-Press Pearl are the fourth and fifth ships to be built based on the Super Eco 2700 design to use Thordon's proven water lubricated system. All vessels in this series have been designed to meet DNV GL’s stringent tailshaft monitoring notation TMON, which means a water-lubricated shaft has the same extended shaft withdrawal inspection periods as an oil-lubricated system.

Terry McGowan, President and CEO, Thordon Bearings, said: “X-Press Feeders has a clearly defined set of environmental sustainability standards, so we are delighted it has incorporated Compac into the design and build of these super eco-friendly newbuilds. The first Compac newbuilds in the X-Press fleet is a further indication of the container shipping segment’s commitment to improving the ocean environment.”

It does appear that liner shipping companies, in particular, are avoiding oil-lubricated propeller shaft bearings in favour of a seawater-lubricated system. In 2015, Thordon inked a milestone agreement to supply the water lubricated bearing system to two 3600 TEU Jones Act boxships. And in 2019 the Compac-operating Log-In Polaris was delivered to a Brazilian shipowner. That same year China’s Guangzhou Wenchong Shipyard delivered the final vessel in a series of two newbuild containerships to a Greek owner. All three of these vessels are based on the Super Eco 2700 design incorporating a Compac shaft line.

Alex Li, MD CY Engineering, said: “The Zhoushan Changhong Shipyard is well equipped to install water-lubricated systems. The Thordon system is one of a number of environmentally sustainable solutions now widely adopted across Chinese yards to meet environmental sustainability goals. About 40 shipyards are experienced with the arrangement and are enthusiastic about the Compac system.”

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