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Q-Fleet Q-Flex and Q-Max

Qatargas pioneered the development of two new classes of Liquefied Natural Gas (LNG) tankers. Referred to as Q-Flex and Q-Max, the ships were designed by a team of engineers who have made a quantum leap in the capacities of LNG carriers. Each ship has a cargo capacity of between 210,000 and 266,000 cubic metres and are 80% larger than the Q-Fleet ships.

These new vessels will have many innovative features to maximize cargo deliveries and to ensure the highest levels of safety and reliability, some of which include:

  • “Membrane” type cargo containment system.
  • Twin engines and shafts to ensure maximum propulsion safety and reliability, with reduced environmental footprint and twin rudders to ensure safety of navigation and maneuverability in confined waters.
  • Slow speed diesel engines which are more thermally efficient than steam turbines and therefore burn less fuel, which will produce 30% lower overall emissions compared to traditional existing LNG carriers.
  • Cargo re-liquefaction plants will return cargo boil off to the cargo tanks and therefore maximise the cargo delivery at the discharge port.
  • Power generation plant has also been enhanced to provide sufficient reserve and thus ensure integrity of supply under all operating circumstances.
  • Underwater coatings using the latest technology silicon anti-fouling system, which not only enhances the speed and performance of the vessel, but is also “friendly” to the marine environment since it does not release any biocides into the sea to prevent marine growth on the hull.
  • Fire fighting specification calling for combinations of Hi-Ex foam, Hi-fog water systems and safer and cleaner fire extinguishing agents to eliminate the need for CO2 – a first for LNG ships.

The Q-Flex vessels have a cargo capacity ranging from 210,000 m3 to 217,000 m3 while the Q-Max can transport between 263,000 m3 to 266,000 m3 of LNG.  The vessels were constructed at three ship building yards in South Korea: Hyundai Heavy Industries (HHI) at Ulsan, Samsung Heavy Industries (SHI) on Geoje Island and Daewoo Shipbuilding & Marine Engineering (DSME) on Geoje Island.

These new vessles will be used to transport LNG from Qatargas 2, Qatargas 3 and Qatargas 4 to markets around the globe.  A total of 32 vessels (19 Q-Flex and 13 Q-Max) have been built.




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