Chain Through Buoys

Category Offshore Surface Buoys

Additional information

Chain Through Buoys

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

General surface 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 ultraviolet ray degradation. For the extreme service environment, the polyurethane elastomer skin can be reinforced by nylon to protective coating with higher tear strength, making the buoy long-lasting and virtually maintenance-free.

Chain Through Buoys Specification

Type	Length (mm)	Overall Length (mm)	Diameter (mm)	Weight (kg)	Net Buoyancy (kg)	Net Buoayncy (lbs)
CTB-1500	2000	2660	1195	520	1500	3333
CTB-1700	2000	2660	1260	545	1700	3778
CTB-2000	2000	2660	1325	560	2000	4445
CTB-2250	2000	2660	1395	580	2250	5000
CTB-2500	2000	2660	1450	610	2500	5556
CTB-2750	2000	2660	1505	630	2750	6111
CTB-3000	2000	2660	1565	658	3000	6667
CTB-3500	2000	2660	1680	750	3500	7778
CTB-4500	2000	2660	1900	880	4500	10000

Chain Through Buoys Features

Chain through buoys have significant advantages, lier easier to handle, better corrosion resistance, low maintenance, never sink or burst, self-fendering that withstands vessel impact.

PU Protective Outer Skin – Reinforced urethane elastomer skin
Self-fendering – High impact absorption capacity
Inner Foam – Unskinable closed-cell rigid foam core
Upper-End Fitting – Various end fitting options available
Internal Steel Core – For better support and balance
Lower End Fitting – Mooring eye used for anchor connecting

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.