Natural Rubber Yokohama Pneumatic Fender 50kpa 80kpa 2.5m*3.5m
What’s Yokohama Pneumatic Fender?
Marine rubber bumper is an upgraded product of boat fender widely used worldwide, which
is filled with high pressure air to withstand berthing impacts.
Compared with normal elastic rubber fenders (such as waste tires,
solid rubber fenders, etc.), it has high guaranteed energy
absorption, low surface impact, combining high abrasion resistance
with low friction and quick installation. Since its application,
pneumatic rubber fender has been used as a buffer due to its high
performance, and it has been widely used in ship-to-ship operation
and ship-to-jetty operation.
Type of the yokohama fender
Advantages of the pneumatic fender
1.Great Safety and Reliability
2.No Deterioration or Variation in Performance
3.Numerous Advantages at Inclined Berthing
4.Cost-effective System
5.Softer Reaction Force for Ship and Jetty Structure
6.Stronger against Shearing Force
7.Adaptable to the Tide
8.Simple and Cost-competitive Installation,Low Maintenance Cost
Detailed Imagine
Specifications of Marine Rubber Bumper
| Pneumatic 50 Standard Sizes |
| Dimension | Deflection (60%) |
| D (mm) | L (mm) | Reaction Force (KN) | Guaranteed Energy Absorption (KNm) |
| 500 | 1000 | 64 | 6 |
| 600 | 1000 | 74 | 8 |
| 700 | 1000 | 137 | 17 |
| 1000 | 1500 | 182 | 32 |
| 1000 | 2000 | 257 | 45 |
| 1200 | 2000 | 297 | 63 |
| 1350 | 2500 | 427 | 102 |
| 1500 | 2500 | 499 | 134 |
| 1500 | 3000 | 579 | 153 |
| 1700 | 3000 | 639 | 191 |
| 2000 | 3500 | 875 | 308 |
| 2000 | 4000 | 1000 | 352 |
| 2500 | 4000 | 1381 | 663 |
| 2500 | 5500 | 2019 | 1131 |
| 3000 | 5000 | 2422 | 1357 |
| 3000 | 6000 | 2906 | 1293 |
| 3300 | 4500 | 1884 | 1175 |
| 3300 | 6500 | 3015 | 1814 |
| 3300 | 10600 | 5257 | 3067 |
| 4500 | 9000 | 5747 | 4752 |
| 4500 | 12000 | 7984 | 6473 |
| Pneumatic 80 Standard Sizes |
| Dimension | Deflection (60%) |
| D (mm) | L (mm) | Reaction Force (KN) | Guaranteed Energy Absorption (KNm) |
| 500 | 1000 | 84 | 9 |
| 600 | 1000 | 94 | 12 |
| 700 | 1000 | 179 | 25 |
| 1000 | 1500 | 236 | 47 |
| 1000 | 2000 | 337 | 66 |
| 1200 | 2000 | 386 | 89 |
| 1350 | 2500 | 554 | 143 |
| 1500 | 2500 | 630 | 179 |
| 1500 | 3000 | 756 | 215 |
| 1700 | 3000 | 829 | 262 |
| 2000 | 3500 | 1126 | 424 |
| 2000 | 4000 | 1453 | 740 |
| 2500 | 4000 | 1817 | 925 |
| 2500 | 5500 | 2653 | 1327 |
| 3000 | 5000 | 2689 | 1558 |
| 3000 | 6000 | 3275 | 1878 |
| 3300 | 4500 | 3476 | 1640 |
| 3300 | 6500 | 3829 | 2508 |
| 3300 | 10600 | 6907 | 4281 |
| 4500 | 9000 | 7551 | 6633 |
| 4500 | 12000 | 10490 | 9037 |
Note :
1. Figures on the table comply with requirements of
ISO17357-1:2014.
2. Weight of fender body and net may vary ±10%.
3. Special sizes are available upon request.
How to Chose Marine Rubber Bumper?
Selection of docking bumpers for small and medium-sized ships:
Tonnage(T) | Recommended Dimension:Diameter x Length(m) | Types of Ship |
| 50 | 0.5 × 1.0 | fishing boat |
| 100 | 0.7 × 1.5~1.0 × 1.5 | fishing boat |
| 200 | 1.0 × 1.5~1.2 × 2.0 | fishing boat, towboat |
| 300-500 | 1.2 × 2.0~1.5 × 2.5 | fishing vessel, towboat |
| 1000 | 1.5 × 2.5~1.5 × 3.0 | towboat, cargo ship |
| 3000 | 2.0 × 3.0~2.0 × 3.5 | cargo ship, marine fishing boat |
| 10000 | 2.0 × 3.5~2.5 × 4.0 | freighter |
Selection of docking bumpers for large tonnage ships:
Dead Weight Tonnage (DWT) | Assumed Landing Speed(M/S) | Effective Kinetic Energy (KN.M) | Dimension: Diameter×Length(m) |
| 200000 | 0.15 | 1890 | 3.3 x 6.5 |
| 150000 | 0.15 | 1417 | 3.3 x 6.5 |
| 100000 | 0.15 | 945 | 3.0 x 5.0 |
| 85000 | 0.17 | 1031 | 3.0 x 6.0 |
| 50000 | 0.18 | 680 | 2.5 x 5.5 |
| 40000 | 0.20 | 672 | 2.5 x 5.5 |
| 30000 | 0.22 | 609 | 2.5 x 4.0 |
| 20000 | 0.25 | 525 | 2.5 x 4.0 |
| 15000 | 0.26 | 425 | 2.5 x 4.0 |
| 10000 | 0.28 | 329 | 2.0 x 4.0 |
| 5000 | 0.33 | 228 | 2.0 x 3.5 |
Safety and Reliability
Yokohama Pneumatic Rubber Fenders are constructed of several layers
of strong tire-cord, and are thus resistant to pressure and
cutting. The safety factor adopted in the design of this fender is
based on accepted theory and has been proven by extensive
experimentation. Operational experience over a long period of time
attests to its high safety and reliability, and hydraulic pressure
tests have proven the strength to be suitable. Furthermore,
large-size fenders are equipped with a safety valve to release the
inside air in the event of accidental over-pressure. The figure
below shows data obtained from many destructive pressure tests at
various percentage compressions. Such data are used to establish a
basic minimum endurable pressure (MEP) curve for pneumatic rubber
fenders.
Advantages at Inclined Berthing
Ships usually make initial contact with the dock or another ship on
STS operations at an oblique angle. In the case of solid rubber
fenders or foam fenders, rated reaction force and energy absorption
decreases considerably at inclined compressions compared with
parallel compression. In order to compensate for the decrease of
energy absorption at inclined compression, it is necessary to use
larger sizes in the case of solid rubber fenders or foam fenders.
Adaptable to the Tide
Yokohama Pneumatic Rubber Fenders basically float on the water in
an unrestricted vertical plane corresponding to the tidal range and
ship's vertical movement. This means that energy absorption always
takes place at the most suitable position, and that only one fender
is required per dolphin.
Applications
►In ports with extreme tidal variations
►Ship-to-ship operations
►Oil & Gas (typically FSRU)
►Temporary berthing
