Bend Stiffeners
Dynamic flexible risers, power cables and umbilicals may be connected to a rigid structure such as a subsea riser base or the turret exit of a floating production vessel. The presence of environmental loads subsequently causes the riser to flex about this fixed loaction. This movement, in combination with large axial loads may cause damage to the riser structure due to overbending and fatigue.
We produce individually designed integral bending stiffeners for rigid riser end fittings. These conically shaped polyurethane mouldings add local stiffness to a riser, flowline, cable or umbilical to limit the bending stresses and curvature to acceptable levels.
The bending stiffener has a conical external profile and a central hollow cylindrical section allowing it to slide over the end of the riser.
Each bending stiffener is designed individually to protect the riser minimum bend radius (MBR) under the defined tension and angle combinations, meeting the loadcases (tension vs angle) of each application and are specified as either dynamic or static depending on their intended use.