SUB-LINK™ Buoyant Vertebrae Bend Restrictors

Product Overview

SUB-LINK™ Buoyant Vertebrae Bend Restrictors comprises a number of interlocking elements which articulate when subject to an external load and lock together to form a smooth curved "locking" radius. This radius is chosen to be equal to or greater than the minimum bend radius of the pipe that it is applied to. Once the elements have locked together the bending moment present is transferred into the elements and back through a specially designed steel interface structure into the adjacent rigid connection, therefore protecting the pipe / cable from potentially damaging loads. Flexible pipes, flowlines, power cables and umbilicals are usually connected to a rigid structure such as a subsea riser base, PLEM or wellhead. To prevent these pipes from overbending at the interface between flexible and rigid structures, Vertebrae Bending Restrictors are often installed on the pipe. The VBR is specifically used where static or quasi-static loads act on a pipe, rather than dynamic loads when a Bending Stiffener would be more suited. We are able to offer either a bespoke design or make use of a vast array of existing designs of bending restrictor elements to suit a wide range of pipes, umbilicals and cables. We are also able to design and manufacture the steel interface structure required.

Product Images
  • Buoyant Vertebrae Bend Restrictors
  • Buoyant Vertebrae Bend Restrictors
  • Buoyant Vertebrae Bend Restrictors
  • Buoyant Vertebrae Bend Restrictors
  • Buoyant Vertebrae Bend Restrictors
  • Buoyant Vertebrae Bend Restrictors
  • Buoyant Vertebrae Bend Restrictors
  • Buoyant Vertebrae Bend Restrictors
Technical Specifications
Description Specification
Design Forces To Suit Project
Design Life As Required
Cable Size As Required
Materials Carbon Steel, Stainless Steel, Super Duplex
Fasteners Carbon Steel, Stainless Steel, Super Duplex, Inconel, Titanium
Features
  • A split design allows installation of the restrictor after pipe termination
  • Ease of installation onshore and offshore
  • Buoyant in water, eliminating self weight loading on pipe
Clients & Track Record
Subsea Buoyant Vertebrae Bend Restrictors
Offshore Buoyant Vertebrae Bend Restrictors
Deepwater Buoyant Vertebrae Bend Restrictors
Cable Buoyant Vertebrae Bend Restrictors
High Voltage Buoyant Vertebrae Bend Restrictors
Polyurethane Buoyant Vertebrae Bend Restrictors
Interlocking Buoyant Vertebrae Bend Restrictors
Marine Buoyant Vertebrae Bend Restrictors
Windfarm Buoyant Vertebrae Bend Restrictors
Large Buoyant Vertebrae Bend Restrictors
Small Buoyant Vertebrae Bend Restrictors