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HFLs & STFLs

HFLs & STFLs

HFL/STFL assemblies are used to interconnect subsea equipment. HFL’s provide the transmission of hydraulic fluid, chemical, and service line connections between subsea equipment.

Each end of the HFL is terminated to a ROV Free ‘Fly to Place’ stabplate which house self-sealing female hydraulic couplings, connecting each of the lines contained within the HFL bundle. Replaceable seals are contained within the female couplings of the stabplates for easy retrieval.

HFL’s are installed from deployment frames with ROV assistance, but they are also capable of being installed through the clump weight method.

HFL’s are sufficiently flexible to allow handling by ROV and are negatively buoyant when the lines are filled with their normal operating fluids. The overall construction is sufficiently robust which allows the components to withstand the exerted forces during manufacture, transportation, installation and service life.

All materials used in the HFL’s and ancillary equipment are compatible with each other, and with most fluids, suitable for subsea use under normal service conditions for the life of field.

Coupling Population Up to 26
Coupling Size Various
Design Depth 3000m

Lockdown Mechanism Separation Force

 218 kN
Maximum Pressure Up to 15000psi
Design Life 30 Years
Applicable Standard ISO13628-6/7/8
Male & Female Stabplates UNS S31803
Lock Down Interaction – Drive Screw HIDURON 130
Lock Down Interaction – Recepticle UNS S318103 / UNS S32760
ROV Buckets
OD of Stabplate Ø300 / Ø350
Length Up to 250m
  • Strain wire (up to 3T load capacity)
  • Transportation frame
  • Multi Lifting points designed and tested in accordance with DNV 2.7-3
  • Variable minimum installation height to suit client requirements
  • Bend restrictor / limiter
  • Bend stiffener
  • HFL on bottom stability analysis using DNV RPF109
  • Butt welded hose fittings
  • Anti-rotation hose fittings
  • Hoses in
 
Vertical / Lateral ± 75mm
Orientation Z Axis ± 10⁰
Azimuth / Elevation Y Axis ± 10⁰
Bearing X Axis ± 10⁰

 

  • Fully qualified
  • Full project list available on request