Gas Applications

Optimize FSRU and FLNG projects with APL’s versatile mooring, loading, and offloading solutions


APL has developed cost-effective mooring and gas transfer technologies for both offshore floating storage and regasification unit (FSRU) terminals and floating liquified natural gas (FLNG) production vessels. Based on the proven Submerged Turret Loading (STL™) technology, APL deployed the world's first offshore liquified natural gas (LNG) terminal in 2005 and has since developed a suite of related technologies. Our systems are suitable for shallow and deep-water applications and can moor your floater in water depths ranging from 20 to 3000 m.

  • APL Mooring and Loading Systems Brochure

Gas import solutions (FSRU)

A number of technologies have been developed to moor an FSRU and transfer gas to powerplants or to gas grids onshore. Our turret mooring systems keep the FSRU on station while receiving LNG from incoming LNG carriers. The systems, which typically replace more costly jetty and breakwater solutions, are designed to accommodate shallow-water applications, providing pipeline capital-expenditure savings and lower installation costs.

Render of an LNG Cutin Connect

LNG loading and offloading features

  • Cost-effective energy import
  • FSRUs faster to deploy versus costly onshore receiving facility
  • No need for jetties
  • Plug and play system allows for easy relocation
  • Reliable in both benign and harsh environments with quick disconnection functions

Gas processing and export solutions (FLNG)

We provide a number of turret mooring technologies suited to moor FLNG units offshore. These are well-proven solutions and suitable for a variety of water depths, metocean data and gas flow/pressure regimes.

Render of two Hilli barges, side-by-side

FLNG features

  • Enables schedule decoupling of the offshore installation and shipyard work
  • Can be designed for permanent or disconnectable service
  • Proven and reliable in both benign and harsh environments
  • No need for jetties
  • High safety due to its offshore location

Power barges for power/energy transfer

With a high-voltage power swivel included in our turret mooring systems, APL can provide solutions for power barges/floaters, transferring power rather than gas to shore.

Carbon capture and storage

As part of our extended green energy initiative, we have developed turret mooring systems that allow project owners to export and inject CO2 into the reservoir offshore. Our systems will allow transfer of CO2 from a CO2 carrier to a floating or fixed structure (which, in turn, injects the CO2 into the reservoir) as well as direct injection from the CO2 carrier.

A rendering of two ships side by side at sea with an underwater view of the left one connecting to an APL tool

Related Products

Submerged Turret Production

The Submerged Turret Production is a turret mooring system for FPSO vessels suitable for seas as high as 16 m Hs and water depths to 2600 m.

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External Turret Production

Minimize turret integration work with the External Turret Production.

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Submerged Swivel and Yoke

Optimize your regasification projects with the Submerged Swivel and Yoke system.

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Submerged Turret Loading

The Submerged Turret Loading system enables scheduled decoupling between offshore and shipyard work.

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Single Anchor Loading

A lower-cost alternative to the STL system for use in situations in which traditional catenary anchor leg mooring (CALM) buoys cannot be used. 

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APL designs and manufactures cost-efficient and innovative technology with a focus on products in the interface between the seabed and the floating units.

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