Due to commercial advantages LMC embarked on an in-house research and development program, starting in 2010, to fully design and supply toroidal and axial swivels to the turret and buoy market.

By offering a complete turret or buoy and swivel assembly, LMC can apply economies of scale that enable extremely competitive “turn-key” solutions considering both cost and schedule.

By incorporating an LMC-designed and fabricated swivel into its mooring solution, inherent interface issues can be much reduced, allowing for a more streamlined integration and installation. The swivel team works very closely with the mooring system, structural, piping, and electrical teams to ensure that the design iterations of the turret and swivel loadings and deflections are fully coupled between these two major components.

LMC’s fluid transfer systems are type approved and project approved by DNV and ABS (depending on the project CLASS).

LMC fluid transfer system experience

  • Toroidal Swivels
  • 12” Toroid (3000psi)
  • 8” Toroid (5000psi) – in service
  • 4” Toroid (5000psi)

  • Inline Swivels
  • 8” Inline Swivel (3000psi) – in service
  • 8” Inline Swivel (5000psi)
  • 12” Axial Swivel (5000psi)
  • 8” Inline Swivel (435psi) – in service

  • Utility Swivels
  • 5 x ¾” Unit (5000psi) – in service
  • 2 x 2” Unit (5000psi)
  • 10 x ½” Unit (5000psi)
  • 3 x ½” Unit (290psi) – in service
  • 3 x ¾” Unit (1500psi) – in service

  • CALM Buoy Swivels
  • 2 x 6” Unit (290psi) – in service
  • 2 x 24” Unit (435psi)


LMC is well versed in the design, integration and supply of High Voltage and Medium Voltage Power Swivels, Junction Boxes and Dynamic Power Cable Terminations. LMCs experience includes expert knowledge of current and voltage ratings, Hazardous Area and Explosion proof ratings, and IP ratings suitable for offshore and harsh environments. LMC is working together with the leading power swivel and dynamic cable installation and connection equipment suppliers, to ensure the supply chain is ready for the requirements of floating wind for 33kV, 66kV and beyond for power transfer and connection systems.


AS the hydrogen industry develops, it is clear that there will be two locations to generate the hydrogen through electrolysis, that being on-shore or offshore. When the hydrogen is generated offshore, there will be a requirement for transportation back to shore for connection into the onshore network. In some locations, this can be via new or existing subsea piping networks, but for other locations, the transportation will rely on hydrogen cargo vessels, in the same way as it has relied on LNG carriers to date.

This will therefore require a hydrogen transfer system, be it a buoy loading station, or a quayside or jetty loading arm to be able to load and offload the hydrogen.

Given LMC’s experience of fluid transfer systems, jetty mooring systems, and loading and offloading buoy design, LMC sees this future market as an opportunity for development.


Through our established and approved supply chain, LMC is able to procure and supply production, water injection and gas injection risers, gas export risers, subsea umbilicals, and power cables, including all installation and pull in aids, hang off clamps, seabed stability and anchoring equipment.

To support the supply of the equipment, LMC take full project responsibility for the following design requirements:

  • Global Field and Site Layout Optimisation Studies
  • Global Riser and / or Power Cable Dynamic Analysis
  • Global System Clash Check Analysis
  • Riser and Dynamic Power Cable Specifications
  • Technical and Commercial Bid Evaluations
  • Procurement
  • Expediting
  • Monitoring
  • Inspection
  • Witnessing
  • Installation and Pull in Analysis and Equipment Design
  • Interface Analysis
  • Structural Design of Hang -off locations, balconies, deck and hull reinforcements
  • Seabed and on-bottom stability analysis
  • Geotechnical analysis, trenching and burial assessments


One interface location in the offshore industry is typically the Pipeline End Manifold (PLEM). With this in mind, LMC offer to the market the design, procurement, and fabrication of the complete PLEM system as part of the riser system design and / or supply, thus reducing the interface risk to the client.
Engineering design typically includes:

• Geotechnical analysis of embedment and skirt requirements
• Structural design and fabrication
• Pipe Stress
• Specification and Procurement of Subsea Valves
• Dynamic Riser Interface Analysis at the local interface
• Offshore Installation Engineering