FLNG: the combination of our know-how

FLNG (Floating Liquefied Natural Gas) is the first project type which involves so many of Technip’s skills.

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FlareAn elevated flare for the safe disposal of hydrocarbons released for short periods during startup or as the consequence of the action of one of the many overpressure protection systems. LNG loading systemThe next generation of systems is expected to use cryogenic flexible pipes for which Technip has developed an industry leading product. The two FLNGs under construction are using side by side offloading with articulated arms. LiquefactionMassive refrigeration systems with large compressors are required to liquefy the gas. Pre-treatmentMany large modules containing everything needed to manage the wells, separate the gas from hydrocarbon condensate and water and clean up the gas. Power generation and utilitiesThe FLNG is completely autonomous in electrical power and other utilities. SwivelThe FLNG deck rotates around the turret. The swivel allows the transfer of multiple well streams and hydraulic and control signals, from the turret to the deck. Storage inside the hullThe storage tanks are specially designed to resist the sloshing of LNG in partially filled tanks and rough seas. Cooling waterCold water, taken deep below the surface, helps reduce refrigeration power consumption. Safety gaps between the hydrocarbon modules and inhabited areas. TurretA fixed point firmly anchored to the seabed allows the FLNG to weathervane to face into the wind and waves in a way that minimizes deck movement. Stern thrusters may be additionally installed to facilitate LNG carrier mooring and cargo transfer. Control room and living quartersAn accommodation block with several hundred beds and a rooftop helideck for all personnel movements.

© Stéphane Jungers


FLNG (Floating Liquefied Natural Gas) is the first project type which involves so many of Technip’s skills. It is the concretization of decades of work for the Group in LNG process plant, floating offshore facilities and subsea infrastructure. FLNG is also an excellent example of differen­tiation through the integration of multiple, core activities to produce something new.

FLNG design requires prior knowledge of: natural gas liquefaction; the design and construction of large FPSOs (Floating Production Storage and Offloading) that up until now have been used only for oil production; and the design of the riser and mooring systems that link offshore gas fields with floating platforms. Technip has the unique ability to provide expertise in all these key areas, with recent successful references through projects such as Yemen LNG, Akpo FPSO in Nigeria and the subsea project MAD6 in India. Many new design challenges have been overcome by our teams to have:

  • compact and motion resistant processes that produce high quality LNG;
  • layout features and passive and active safety systems that safeguard life and property;
  • piping and structural elements that resist the long term fatigue from the battering of wind and waves.

In July 2009, Shell signed a 15 year umbrella contract with the Technip Samsung Consortium for a program of generic FLNGs. Today, the construction of Prelude FLNG is well underway in our partner’s shipyard in Goeje, South Korea, while the original agreement has been extended to cover innovations for the next generation of Shell FLNGs that are at design stage in Paris La Défense in France.

Then, in June 2012, a contract to supply Petronas with a small capacity FLNG was signed with Technip and Daewoo, a project jointly managed by the Kuala Lumpur and Paris centers. These are the only two FLNGs under execution to date in the world, making Technip the uncontested market leader.