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INTEGRAL FLOTATION

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Hawser Flotation
SPM Hawsers typically manufactured from nylon (SG 1.14) will not fload naturally in sea water. A hawser wich sinks will foul the catenary moorings of a CALM buoy or other subsea equipment. We have a range of flotation methods.
  • Lace-on hawser floats
  • Tubular floats
  • Intergral hawser flotation
Please ask us for detailed data sheets on the below flotation types.
                                                                                                                                   
Integral Flotation
It has been reported by operators using mooring hawsers with conventional lace-on floats, that during the lifetime of the hawsers the floats tend to suffer damage and can be ripped away from the rope. This can be costly to the operator having to secure replacement floats and organise maintenance crews to replaced damaged/ missing floats. Our Integral Flotation systems overcomes these issues, and in addition offers many other operational benefits.
Mooring hawsers incorporating our Intergral floating system are wrapped in closed cell buoyancy foam, ensuring sufficient reserve buoyancy is calculated into the construction to support the hawser in seawater. This is covered with an over braided jacket. Additionally this can be polyurethane elatstomer coated to enhance abrasion characterestics of the assembly.
     

 Benefits of Intergral Flotation :
  • Intergral Flotation systems does not need to be replaced / maintained during the hawser lifetime, eliminating the need for spare floats and expensive maintenance crews.
  • The construction of the Intergral Flotation systems enhances the abrasion resistance of the hawser to external mechanical damage, i.e. Floating hose flanges.
  • At CALM buoys where the hawsers maybe left floating in the water between offtakes, the Intergral Flotation system reduces the amount the rope will flex with the wave action. This reduces internal yarn-on-yarn abrasion damage and can help to increase retirement programmes.
  • Ropes left floating in the water between offtakes are subject to ' water wash ' through the rope, which over time will remove the unique marine finishes applied to modern day synthetic fibres to reduce abrasion / fatigue damage internally. The Integral Flotation systems with polyurethane elastomer coating restricts water wash.
 

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