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Floating Pneumatic Fender With Compressed Air For Ship To Dock Protection
Floating pneumatic rubber fenders are known as Yokohama fenders or inflatable pneumatic fenders. Floating pneumatic rubber fenders is made of the synthetic-cord-reinforced rubber sheet with compressed air inside to 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 Marine Yokohama type floating pneumatic rubber fenders are manufactured and tested fully compliant with ISO 17357.
Fender structure
Outer Rubber
The tough abrasion resistant outer rubber is designed to protect the inner rubber and tyre-cord layers from damaging external forces. The material has mechanical properties to withstand the arduous operational conditions for which it is designed.
The diagram below shows the actual properties as specified in ISO 17357. Generally, the outer rubber is black, but other colours such as grey and off-white can be supplied upon request.
Tyre-cord Layer
Synthetic tyre-cord layers have proven to be the best option for
strong, efficient reinforcement for pneumatic rubber fenders. Each
layer is coated with a rubber compound on both sides that prevents
contact between the layers, reducing friction and
wear during bending, compression and stretching. The same compound
isolates each thread within the layer.
This greatly improves the ability of the fender to hold pressure,
fatigue resistance and endurance life. Other reinforcing layer
materials such as canvas have wear points that significantly reduce
the life off the fender.
Inner Rubber
The inner rubber seals pressurised air inside the fender. It is usually constructed of a compound similar to that of an inner tube in a truck or car tyre to ensure a good level of air tightness.
Pneumatic Fender Applications
In ports with extreme tidal variations
Ship-to-ship lightering operations
Oil & Gas (typically FSRU
Temporary bething
How to choose the right size fender
A船舶(DWT) A vessel(DWT) | B船舶(DWT) B vessel(DWT) | 假定接舷速度(m/s) ASSumed speed Access side(m/s) | 有效运动能量(kJ) Effectirve kinetic energy
| 护舷尺寸(D*L) Fender Dimension (D*L) |
| 300,000 | 200,000 | 0.15 | 1230 | 3.3*6.5 |
| 150,000 | 0.15 | 1030 | 3.3*6.5 | |
| 100,000 | 0.15 | 781 | 3.3*6.5 | |
| 200,000 | 150,000 | 0.15 | 882 | 3.3*6.5 |
| 100,000 | 0.15 | 693 | 3.3*6.0 | |
| 85,000 | 0.15 | 618 | 3.0*5.0 | |
| 100,000 | 85,000 | 0.17 | 617 | 3.0*5.0 |
| 50,000 | 0.18 | 511 | 3.0*5.0 | |
| 40,000 | 0.20 | 544 | 3.0*5.0 | |
| 50,000 | 40,000 | 0.20 | 425 | 2.5*5.5 |
| 30,000 | 0.22 | 437 | 2.5*5.5 | |
| 20,000 | 0.25 | 443 | 2.5*5.5 | |
| 20,000 | 15,000 | 0.27 | 318 | 2.5*4.0 |
| 10,000 | 0.30 | 309 | 2.2*3.5 | |
| 5,000 | 0.35 | 253 | 2.0*3.5 | |
| 10,000 | 5,000 | 0.35 | 212 | 2.0*3.5 |
| 3,000 | 0.40 | 196 | 2.0*3.5 | |
| 1,000 | 0.50 | 137 | 2.0*3.0 |
Pneumatic Marine Fenders Questions
What is a pneumatic fender?
What is a Yokohama fender?
How much does a Yokohama fender weight?
What are marine fenders?
Why is it called Yokohama fender?
What are ship fenders?
