Polyurethane vertebrae bend restrictors (VBRs) are typically installed at the interface between flexible and rigid structures (such as J-tubes) to protect power cables and umbilicals from damage caused by external stress.
Design and installation features
The VBRs feature a split-piece design, allowing for easy installation on deck and direct assembly to cables and umbilicals onboard laying vessels or barges. This modular design not only improves installation efficiency but also ensures safety in complex sea conditions.
Application scenarios
Flexible pipelines, flowlines, power cables, and umbilicals often need to be connected to solid structures, such as subsea riser bases, plems (manifold terminals), or wellheads. At these connection points, flexible structures are susceptible to damage from excessive bending without protective measures. Therefore, VBRs are often installed on the pipelines to provide necessary support and protection.
Features and benefits
Prevents excessive bending: Effectively limits the bend radius of flexible pipes or cables, preventing structural fatigue and damage.
Adapts to different loads: When subjected to static or quasi-static loads, VBRs (velastic rigidity limiters) are typically used; when subjected to dynamic loads, bend stiffeners are more suitable.
High-strength polyurethane material: Excellent resistance to seawater, corrosion, and wear, ensuring long-term service life.
Customization and extension services
We not only provide standardized polyurethane vertebrae bend limiters, but also customize them to meet specific project requirements. We can also design and manufacture the required steel interface structures to ensure efficient and reliable connection between the bend limiter and the piping system.
Specifications of Polyurethane Vertebrae Bending Restrictors
Model Number | Storage Country | Color | Warranty | Engineering Support | Price |
Bending restrictor | China | Yellow | One year | Yes | Call for price |
Technical Specifications of Polyurethane Vertebrae Bend Restrictors
The main advantage of polymer bend restrictors over metallic ones is that they do not require local cathodic protection, and due to the low density of the polyurethane material, they typically add less weight to the system.
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 |
With a large technical and engineering capability, Philson provides a comprehensive solution for cable protection, including design, steelwork components, polyurethane molding, testing, and validation. To find out more about how our Polyurethane Vertebrae Bending Restrictor, get in contact with Philson today.
