Urethane Subsea Cable Bend Stiffener

Urethane subsea cable bend stiffeners are flexible yet durable components designed to reinforce and protect underwater cables. Typically made from high-strength polyurethane, they provide structural support to cables and prevent excessive bending, kinking, or damage during installation and service. Polyurethane bending stiffeners help maintain the integrity of the cable by distributing mechanical stresses and enhancing its resistance to abrasion, impact, and environmental factors such as pressure and temperature changes. Additionally, they are resistant to chemicals and seawater, ensuring submarine cable systems' long-term reliability and performance, which are crucial for telecommunications, energy, and data transmission.

Features of cable bend stiffeners

• Provides additional local stiffness to the umbilical or flowline

• Limits bending stresses and curvature

• Prevents structure damage from over bending

• Polyurethane elastomeric material

• Tapered shape

• Pressure resistance

• Hydrodynamic design

• Abrasion resistance

• Flexibility and elasticity

• Environmental durability

• Pre-installed fittings or interfaces easy installation

• Provides gradual increases in the overall stiffness 

• Split and single piece designs available

Application

In offshore wind power

• J-tube and I-tube exits

Protects export and array cables as they transition from the flexible seabed section into the rigid foundation (monopile, jacket, or substation).

• Dynamic cable connections on floating wind turbines

At the tower entry point, bend stiffeners prevent over-bending from wave and platform motions.

• Substation cable terminations

Protects high-voltage export cables where they enter the offshore substation.

In offshore oil & gas platforms

• Risers and umbilicals at subsea wellheads and manifolds

Installed at the connection point to avoid sharp bends under current and vessel motions.

• Dynamic riser connections to FPSOs, semisubs, or TLPs

Bend stiffeners/restrictors are placed at the hang-off point to reduce cyclic fatigue.

• Flowline and umbilical touchdown zones

Used where flexible pipes or cables contact the seabed, preventing excessive curvature.

• Pipeline end terminations (PLETs) or subsea structures

Reinforcement at the tie-in point for control umbilicals or jumper cables.

Custom polyurethane bending stiffeners

Bend stiffeners can be used for offshore or subsea devices such as cables, umbilicals, flexible pipes, or pipes connected to drillings. Some can use bend restrictors. The design of bend stiffeners needs to be combined with ambient temperature and usage scenarios. You can contact us for relevant consultation. Providing standard or customized models according to your needs.