Buoy benefits

The CALM Buoy Swivel, which is fully certified by DNV GL includes new swivel technology which allows the buoy to rotate while maintaining a leak-free joint between the subsea pipe lines and vessel during the transfer of fluid


Flexible Engineered Solutions International (FES) has developed new technology for a major manufacturer of marine equipment, based in China. The CALM Buoy Swivel, which is fully certified by CALM BouyDNV GL includes new swivel technology which allows the buoy to rotate while maintaining a leak-free joint between the subsea pipe lines and vessel during the transfer of fluid. Because it enables the replacement of seals on board without the requirement to bring the main buoy into a repair yard, the new swivel will significantly reduce maintenance downtime for the CALM Buoy, avoiding it being offline for long periods of time.

Other benefits of the FES Calm Buoy Swivel are:

  • It has a leak detection system complete with instrumentation to allow the user to monitor the seal performance of the Calm Buoy Swivel;
  • It has an integrated pressure transmitter to monitor the pressure during loading; and
  • It has an integrated electrical slip ring to allow electrical cable connections from subsea to topside.

The new-patented technology will be delivered in January 2017 to China as part of a contract awarded to FES 12 months previously. Speaking about the contract, Ian Latimer, technical director at FES International, said: “This new technology is the result of heavy investment in research and development by FES so it is really pleasing to be on the eve of its first installation where we believe it will make a significant contribution to keeping costs down by reducing maintenance downtime.”