Single Point Mooring System Chain Support Buoys
General surface chain support buoys are extensively used in single-point mooring (SPM) systems. These specialized buoys include cylindrical buoys, chain-through buoys, and pick-up buoys designed for various marine applications.
Constructed with resilient closed-cell polyethylene/EVA foam around the inner central steelwork and covered by a polyurethane (PU) outer skin, these buoys offer exceptional durability. The closed-cell foam core ensures self-fendering and unsinkable performance even in case of damage. The self-colored polyurethane elastomer skin provides excellent resistance to abrasion and UV degradation. For extreme service environments, the polyurethane elastomer skin can be reinforced with nylon to enhance tear strength, resulting in long-lasting, virtually maintenance-free operation.
Key Features
PU Protective Outer Skin (Polyurethane elastomer skin with 3~10mm thickness)
Self-fendering (High impact absorption capacity)
Inner Polyethylene Foam (Unsinkable closed cell rigid foam core, never absorbs water even if PU outer skin is damaged)
Upper End Fitting (Various end fitting options available: swivel ends, pad-eye, crucifix)
Internal Steel Core (For superior support and balance)
Reinforcement Layer (Reinforced nylon filament ensures polyurethane elastomer protective coating has higher tear strength)
Three Types of Chain Support Buoys
Cylindrical Utility Buoys Specification
Cylindrical foam-filled chain support buoys ranging from 1 Ton to 4 Tons (or more) - Fitted on each end with mooring pad eye, swivel, or mixed configurations depending on application requirements.
| Type |
Length (mm) |
Overall Length (mm) |
Diameter (mm) |
Weight (kg) |
Net Buoyancy (kg) |
Net Buoyancy (lbs) |
| CUB-1000 | 1500 | 2100 | 1080 | 375 | 1000 | 2222 |
| CUB-1250 | 1550 | 2100 | 1160 | 380 | 1250 | 2778 |
| CUB-1500 | 2000 | 2500 | 1130 | 445 | 1500 | 3333 |
| CUB-1700 | 2000 | 2500 | 1180 | 455 | 1700 | 3778 |
| CUB-1750 | 2000 | 2500 | 1190 | 460 | 1750 | 3889 |
| CUB-1850 | 2000 | 2500 | 1230 | 470 | 1850 | 4111 |
| CUB-2000 | 2000 | 2500 | 1290 | 485 | 2000 | 4445 |
| CUB-2250 | 2000 | 2500 | 1340 | 500 | 2250 | 5000 |
| CUB-2500 | 2000 | 2500 | 1400 | 515 | 2500 | 5556 |
| CUB-2800 | 2000 | 2500 | 1510 | 595 | 2800 | 6222 |
| CUB-3000 | 2000 | 2500 | 1520 | 550 | 3000 | 6667 |
| CUB-3200 | 2000 | 2500 | 1560 | 560 | 3200 | 7111 |
| CUB-3500 | 2000 | 2500 | 1630 | 580 | 3500 | 7778 |
| CUB-3900 | 2000 | 2500 | 1705 | 605 | 3900 | 8667 |
Foam Filled Chain Through Buoys Specification
Foam-filled chain support buoys with chain passing through the buoy, from 1.5 Tons to 4.5 Tons (or more) - Available in cylindrical or rectangular shapes - Fitted with chain locking plate or chain locking pin on one or both ends.
| Type |
Length (mm) |
Overall Length (mm) |
Diameter (mm) |
Weight (kg) |
Net Buoyancy (kg) |
Net Buoyancy (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 |
Foam Filled Pick Up Buoys Specification
Small buoyancy units from 90kg to 1 ton designed to support a small length of rope or cable wire for line pickup operations. Available in cylindrical or spherical shapes. Fitted with swivels on each end.
| Type |
Length (mm) |
Overall Length (mm) |
Diameter (mm) |
Weight (kg) |
Net Buoyancy (kg) |
Net Buoyancy (lbs) |
| PUB-90 | 660 | 1000 | 515 | 42 | 90 | 200 |
| PUB-225 | 910 | 1570 | 690 | 120 | 225 | 500 |
| PUB-400 | 910 | 1570 | 900 | 155 | 400 | 889 |
| PUB-800 | 910 | 1570 | 1150 | 180 | 800 | 1778 |