Polyurethane Bend Restrictors for Subsea Cables
Interlock polyurethane bend restrictors are essential components used in subsea cable protection systems to prevent excessive bending and mechanical stress at critical transition points. Designed with a durable interlocking structure, these restrictors are commonly used in offshore wind farms, subsea oil and gas fields, and marine renewable energy projects to enhance the lifespan and safety of power or communication cables.
What are polyurethane bend restrictors?
A polyurethane bend restrictor is a modular assembly made from high-performance marine-grade polyurethane segments. Its interlocking “vertebra” design provides flexibility in controlled directions while limiting the cable’s minimum bending radius, thereby preventing kinking, cracking, or fatigue damage. These restrictors are especially important where cables exit j-tubes, lie on uneven seabeds, or interface with hang-off systems.
Key features of interlock bend limiters
High strength & durability: Made from abrasion-resistant and corrosion-resistant polyurethane, these restrictors withstand high mechanical loads and harsh underwater environments.
Interlocking segment design: The modular, symmetrical segments ensure efficient load distribution and allow easy adaptation to various cable diameters.
Customizable configurations: Can be tailored for specific cable sizes (e.g., 3x95 mm², 3x185 mm², 3x300 mm²) and project needs.
Easy installation: The snap-together interlock structure simplifies offshore installation, saving time and labor.
Long-term protection: Provides over 25 years of service life with minimal maintenance.
Applications
Subsea power and fiber optic cables
Offshore wind farm cable transitions
Floating and fixed oil platforms
J-tube cable exit points
Cable touchdown areas on the seabed
The interlock polyurethane bend limiter is a proven solution for subsea cable integrity, combining mechanical reliability, resistance to environmental degradation, and installation efficiency. Whether you're protecting export cables in offshore wind projects or umbilicals in deepwater energy fields, these restrictors ensure your subsea infrastructure remains secure and efficient throughout its operational life.
