Pneumatic Marine Boat Rubber Fender Bulkbuy Boat Parts Ship Fender
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.
Note: The floating pneumatic rubber fenders have sometimes been colloquially referred to as “Yokohama Fenders” or “Yokohama type fenders” – ISO 17357:2002 Ships and marine technology — High-pressure floating pneumatic rubber fenders.
Pneumatic rubber fenders are constructed from synthetic-cord-reinforced rubber sheets with compressed air inside, enabling them to float on water and serve as shock absorbers between ships (ship-to-ship) or between ships and berthing structures during docking operations.
These fenders consist of an outer rubber layer, reinforcement synthetic-tire-cord layer, and inner rubber layer, all vulcanized firmly together. Fenders with diameters of 2500mm and larger include safety valves to release excess internal pressure during accidental over-compression. The material properties comply with ISO 17357:2002 standards.
Pneumatic Fender Applications
■ In ports with extreme tidal variations
■ Ship-to-ship lightering operations
■ Oil & Gas (typically FSRU)
■ Temporary bething
Construction Components
■ Outer Rubber: Protects cord layers and inner rubber from abrasion and external forces. The compound offers excellent tensile and tear resistance to withstand harsh weather conditions and heavy usage.
■ Tire Cord Layers: Reinforcement layer designed to maintain internal air pressure integrity.
■ Inner Rubber: Seals the pressurized air within the fender structure.
Performance Specifications
Floating pneumatic rubber fender performance is measured by Guaranteed Energy Absorption (GEA), Reaction Force at GEA deflection, and Hull Pressure at GEA deflection.
Performance Data
| 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 |
Floating Pneumatic Rubber Fenders Advantages
Doowin-Marine pneumatic rubber fenders are manufactured and tested to comply with ISO 17357.
Our real Yokohama-type pneumatic fenders are made by mold based on Korean production technology.
■ ISO 17357 : 2002
All our pneumatic fenders are manufactured and tested comply with ISO 15375 latest edition.
■ Soft Reaction Force
The reaction force does not increase sharply, even under excess load conditions. Can protect ships and mooring facilities.
■ 15° Inclined Berthing
The pneumatic fender’s energy absorption does not decrease at inclined compression up to 15 degrees.
■ Against Shearing Force
Fenders are adequately reinforced using strong tire-cord to cope against combined shearing forces as well as internal.
■ Lower Mooring Forces
This fender safely protect ships and mooring facilities even under rough weather conditions.
■ Adaptable to The Tide
Float on the water in an unrestricted vertical plane corresponding to the tidal range and ship's vertical movement.
■ Low Cost Installation
Fender can be moored simply by means of a guy rope or chain. It can be removed easily to a suitable jetty or quay.
■ Low Maintenance Cost
Maintenance cost is very low. The air leakage is so minimal that it is sufficient to check the air pressure only once a year.
■ Ship Cost Minimization
The fenders are usually packed and shipped in containers or on pallets in vacuumed and folded down state.
