EVA / PE Foam Filled Offshore Mooring Buoys General Surface Chain Support Buoy

General surface chain support buoys are extensively used in single-point mooring (SPM) systems. The chain support buoys include cylindrical buoys, chain-through buoys, and pick-up buoys.

General surface chain support buoys are constructed by resilient closed cell polyethylene /EVA foam around the inner central steelwork, covered by polyurethane (PU) outer kin. The resilient closed cell polyethylene/EVA foam core guarantees self-fendering and unsinkable even in case of damage. And self-colored polyurethane elastomer skin is resistant to abrasion and ultra violet rays degradation. For extreme service environment, the polyurethane elastomer skin can be reinforced by nylon to protective coating has higher tear strength, making the buoy long lasting and virtually maintenance free.

Construction of Chain Through Buoys
The general surface chain through buoys is manufactured with high-quality closed-cell PE/EVA resilient foam, encapsulated with self-colored tough polyurethane elastomer skin.

• Tough reinforce polyurethane outer skin – General surface support buoy’s skin is constructed of polyurethane elastomer, which also can be reinforced with nylon filament. The polyurethane skin is a unique elastomer specifically for offshore applications. It is high resistance to abrasion, fatigue, and ultraviolet degradation and is significantly more durable.
• Laminated closed cell resilient foam core, unsinkable design – General surface support buoys are made with the highest quality closed-cell PE/EVA foam. This resilient foam makes the buoys self-fendering with high impact absorption capacity. Even the skin was punctured, it also is unsinkable without absorbing water. With our unique laminating process, each foam core is integrity. The foam core cannot be reputed after a long time of service.
• Steelwork and end assembly – Through central steel tube with longitudinal gussets and external load distribution flanges at each end, epoxy coated or hot-dipped galvanized, are encased in a closed-cell urethane foam central body. Optional bail eye, clevis eye, swivel, chain locking plate, single locking pin end fitting are available.

The mooring buoys can be installed with various fittings on the top. And the mooring buoys can be designed to meet different requests. It has the same design as common mooring buoys.

The large mooring tube with 82.5mm ID will accept mooring chain of up to 20mm in diameter. The mooring tube is not molded into the buoy but slides into a tubular section that runs down the center of the buoy enabling the tube to be replaced at any stage during the product's service life.

Customized size are available upon request.

1. Resilient out foam (available upon request)
2. Rigid inner foam
3. Internal steel core
4. Load distribution plates
5. Lower end fitting (mooring eye shown)
6. Reinforced urethane elastomer skin

This drawing shows a typical specification only. For the specific design of each buoy, please feel free to contact us.