Yokohama Inflatable Rubber Fender Boat Mooring Fenders
Floating pneumatic rubber fenders are known as Yokohama fenders or Yokohama-type pneumatic fenders. Floating pneumatic rubber fenders are made of the synthetic-cord-reinforced rubber sheet with compressed air inside. The insider air can enable it to float on the water and work as a shock absorbed between two ships (ship-to-ship), or between ships and berthing structures when they come alongside each other on the water. All Doowin Marine Yokohama type floating pneumatic rubber fenders are manufactured and tested fully compliant with ISO 17357
Floating pneumatic rubber fenders can be easily handled and installed with guy-rope or guy-chain because of their lightweight. It can resist the shearing force and maintain energy absorption level under inclined compression up to 15 degrees. Meanwhile, provide low and comparatively even hull pressure.
Consisted of several synthetic-cord layers and tough abrasion-resistant rubber, they have consistent performance even under rough conditions and cyclic load. The maintenance cost and damage risk are minimized too. The best material also ensures self-buoyancy and extremely long service life.
Pneumatic fenders are available from 500 mm to 4,500 mm in diameters, and from 500 mm to 9,000 mm in length. All sizes of pneumatic rubber fenders are available as sling-type or with a heavy-duty chain & tire net. We also supply vertical hydropneumatic fenders for submarines. Foam filled fenders are floating fenders too.
- Lightweight design for easy handling and installation with guy-rope or guy-chain
- Maintains energy absorption level under inclined compression up to 15 degrees
- Provides low and even hull pressure distribution
- Multiple synthetic-cord layers with tough abrasion-resistant rubber for consistent performance
- Minimized maintenance costs and damage risk
- Self-buoyancy and long service life
- Outer Rubber: Protects cord layers and inner rubber from abrasion with excellent tensile and tear resistance
- Tire Cord Layers: Reinforcement layer that maintains internal air pressure integrity
- Inner Rubber: Seals the pressurized air within the fender structure

- Pneumatic 50 (P50): Initial internal pressure 50kPa
- Pneumatic 80 (P80): Initial internal pressure 80kPa
- Type I - Net Type: Covered with chain net, wire net, or fiber net for small size fenders
- Type II - Sling Type: Features lifting devices on each end for connection with guy chain or rope, without protection net

| D x L (mm) | P50 GEA (kNm) | P50 Reaction Force (kN) | P50 Hull Pressure (kN/m²) | P80 GEA (kNm) | P80 Reaction Force (kN) | P80 Hull Pressure (kN/m²) |
|---|---|---|---|---|---|---|
| 500x1000 | 6 | 64 | 132 | 8 | 85 | 174 |
| 600x1000 | 8 | 74 | 126 | 11 | 98 | 166 |
| 1000x1500 | 32 | 182 | 122 | 45 | 239 | 160 |
| 1000x2000 | 45 | 257 | 132 | 63 | 338 | 174 |
| 1200x2000 | 63 | 297 | 126 | 88 | 390 | 166 |
| 1350x2500 | 102 | 427 | 130 | 142 | 561 | 170 |
| 1500x3000 | 153 | 579 | 132 | 214 | 761 | 174 |
| 1700x3000 | 191 | 639 | 128 | 267 | 840 | 168 |
| 2000x3500 | 208 | 875 | 128 | 430 | 1150 | 168 |
| 2500x4000 | 663 | 1381 | 137 | 925 | 1815 | 180 |
| 2500x5500 | 943 | 2019 | 148 | 1317 | 2653 | 195 |
| 3300x4500 | 1175 | 1884 | 130 | 1640 | 2476 | 171 |
| 3300x6500 | 1814 | 3015 | 146 | 2532 | 3961 | 179 |
- Ports with extreme tidal variations
- Ship-to-ship lightering operations
- Oil & Gas (typically FSRU)
- Temporary berthing
- ISO 17357:2002 Compliant: Manufactured and tested to meet international standards
- Soft Reaction Force: Doesn't increase sharply under excess load conditions
- 15° Inclined Berthing: Maintains energy absorption at angles up to 15 degrees
- Shear Force Resistance: Reinforced with strong tire-cord for combined force resistance
- Tide Adaptability: Floats freely to accommodate tidal range and ship movement
- Low Maintenance: Minimal air leakage requires only annual pressure checks
- Cost Effective: Simple installation and low maintenance requirements


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