Polyurethane Bend Restrictors for Submarine Cables and Umbilicals
Introduction: Safeguarding Subsea Connectivity
In the demanding environments of offshore wind, oil and gas, and telecommunications, submarine cables are the lifelines of global infrastructure. However, during installation and throughout their service life, these cables are highly vulnerable to over-bending, buckling, and structural fatigue.
Philson Intelligent Equipment Co., Ltd offers high-performance Polyurethane (PU) Bend Restrictors (BRs). Our solutions are specifically engineered to provide a robust mechanical limit, ensuring that your cables never exceed their minimum bending radius (MBR), even under the harshest tidal and current forces.
Core Working Principle: The Vertebrae Locking Mechanism
Our bend restrictors consist of a series of interlocking, identical "half-shell" segments.
Dynamic Flexibility: Under normal conditions, the restrictor allows the cable to move freely within safe limits.
Precision Locking: Once the cable reaches its pre-defined bending radius, the segments mechanically lock together to form a rigid, semi-circular arc.
Load Transfer: This "vertebrae" structure transfers hazardous bending loads from the cable to the restrictor housing, effectively preventing kinks, core damage, or insulation failure.
Technical Specifications
We provide standardized and customized units to fit a wide range of subsea applications:
Parameter | Description / Typical Value |
Primary Material | High-Grade Polyether-based Polyurethane (PU) |
Typical Application | J-Tubes, Monopiles, Wellheads, Cable Landings |
Locking Radius | Customized from 0.5m to 5.0m+ |
Water Depth Rating | Suitable for Deepwater (up to 3000m) |
Density | Approx. 1100 - 1200 kg/m³ |
Corrosion Resistance | 100% Resistant to Seawater, Microorganisms, and UV |
Applications: From Offshore Wind to Deep-Sea Oil
Offshore Wind: Protecting array and export cables at the entrance of J-tubes or monopile foundations.
Oil & Gas: Safeguarding umbilicals and flowlines during subsea wellhead connections.
Wave & Tidal Energy: Managing the dynamic stress on cables in high-energy coastal zones.
Telecommunications: Protecting fiber optic landings in rocky or high-current areas.
