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Wed 22 Jan 2014 14:46

DNV GL to class methanol-fuelled tankers


Classification society says it sees methanol as part of the future energy mix for shipping.

The first four vessels to use DNV GL's rules for low flash point fuels will be a series of 50,000 dwt tankers ordered by the owners Marinvest and Westfal-Larsen. According to DNV GL, the ships are "the very first to be fuelled by methanol".

The product carriers will be built at Hyundai Mipo Dockyards and are scheduled for delivery in 2016.

Methanol is a low flash point liquid (LFL) fuel that is gaining interest in the market because it does not contain sulphur and is therefore suitable for meeting the upcoming 0.1 per cent SOx Emission Control Area requirements.

Methanol has a flash point of about 12 degrees Celsius and the new vessels will be assigned the additional notation 'LFL FUELLED' to demonstrate their compliance with the safety requirements set out in the industry-first rules published by DNV GL in June 2013.

"Some important safety measures that will be incorporated into these vessels relate to the location of tanks and piping to prevent energy impact from sources such as grounding or cargo operations, a full secondary fuel containment system, leakage detection, automatic shutdown functions and ignition prevention. The safety philosophy is similar to that of gas-fuelled ships," said Håkon Skaret, DNV GL Business Director Tankers.

DNV GL was the first classification society to publish LFL rules and sees methanol as part of the future energy mix for shipping. As well as having low SOx and NOx emissions, a methanol fuel system is easy to retrofit on a ship.

DNV GL has been involved in the newbuilding project from the early design stage, working together with the ship owner, engine maker and yard to ensure an equivalent level of safety to that of a conventional fuel oil system. DNV GL has made use of its long experience with LFL cargo handling on chemical tankers and offshore supply vessels designed to transport low flash point cargo and its experience with alternative fuels from 15 years of working with gas-fuelled ship installations.

Image: Mariline fuel tanker ship, owned by Marinvest and operated by Waterfront Shipping.

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