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DNV GL issues class notation for ship-to-ship gas bunkering operations

CLASSIFICATION society DNV GL has developed a new class notation for gas bunker vessels that ensures safe fuel transfer operations from one ship to another, it has announced. 

DNV GL issues class notation for ship-to-ship gas bunkering operations

CLASSIFICATION society DNV GL has developed a new class notation for gas bunker vessels that ensures safe fuel transfer operations from one ship to another, it has announced. 

DNV GL issues class notation for ship-to-ship gas bunkering operations
25 August 2015 - 21:10

DNV GL issues class notation for ship-to-ship gas bunkering operations

CLASSIFICATION society DNV GL has developed a new class notation for gas bunker vessels that ensures safe fuel transfer operations from one ship to another, it has announced. 

Until now, the development of standards guiding gas fuel transfer operations in ports has lagged behind, as the maritime industry focussed on developing standards for gas fuelled ships rather than bunkering arrangements, said the DNV GL statement. 

But tougher limits on the sulphur content of marine fuels (0.1 per cent) in Emissions Control Areas (ECAs), which entered into force in January 2015, have increased the demand for port infrastructure dedicated to bunkering alternative fuels such as liquefied natural gas (LNG). 

From 2020 onwards, vessels sailing in all European waters will need to comply with a 0.5 per cent sulphur cap. In addition, the UN's International Maritime Organisation's (IMO) global sulphur limit of 0.5 per cent is expected to come into force in 2020 or 2025, depending on the outcome of a review as to the availability of the required fuel oil.

This new DNV GL notation addresses safety concerns in this field and covers gas bunker vessels design and additional requirements to support the development of gas fuelled shipping and bunker operations in ports. 

The rules are flexible and include a variety of gas fuels as well as the configuration of bunker transfer systems, the statement said.

Many port authorities still deem ship-to-ship bunker operations as being too risky and oppose efforts to increase the availability of gas fuels in ports. 

"Complying with DNV GL's new class notation increases the acceptance of safe gas fuel bunkering operations by ports and local authorities and puts bunker ship owners in a stronger position in the market," said DNV GL principal engineer Yury Ilchenko.

In places with limited infrastructure and with demands for short turn-over times in ports, flexible ship-to-ship bunkering transfer operations are an efficient solution, said DNV GL. 

DNV GL's new class notation outlines requirements for liquefied gas carriers and barges that are equipped for carrying liquefied gas and supplying it to gas fuelled ships on a regular basis. 

"The class notation covers safety issues on the gas bunker vessel, its gas bunker related equipment and installations on board. It includes requirements for design, construction and operational procedures with regard to the connection and disconnection of transfer arrangements, bunker transfer and vapour return," Mr Ilchenko said.

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