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Pneumatic Rubber Fender

Pneumatic Rubber Fenders have been in use for around 50 years. It is the leading anti-collision device for marine application in the world. This compressed air filled rubber fender is used as a protective medium for ship-to-ship contact (STS), ship to quay (STQ) and ship-to-berthing (STB).




Pneumatic Rubber Fender can be delivered in various sizes and types. Chain and tyre net (CTN) type is usually recommended to protect the pneumatic rubber fender body, but sling type or body only is also available.




Pneumatic Rubber Fender Performance


The guaranteed energy absorption of Pneumatic Rubber fenders are the energy absorption at 60% deflection. This value can be use in engineering design and actual operation. Table gives the sizes, weights and technical performance of floating-type Pneumatic rubber fenders.

 Nominal size 
(DxL)meter
 Initial internal pressure Po=0.05Mpa   Initial internal pressure Po=0.08Mpa 
Load
(kg)
R
(KN)
Energy
(KJ)
Load
(kg)
R
(KN)
Energy
(KJ)
0.5x1.0 25 64 6 25 83 8
0.6x1.0 32 74 8 32 96 11
0.7x1.5 50 137 17 50 178 24
1.0x1.5 80 182 32 80 235 44
1.0x2.0 100 257 45 125 335 63
1.2x2.0 120 297 63 165 386 86
1.35x2.5 165 427 102 226 554 140
1.5x3.0 315 597 153 370 751 211
1.7x3.0 405 639 191 436 830 263
2.0x3.5 590 875 308 632 1138 424
2.5x4.0 1050 1381 663 1110 1815 925
2.5x5.5 1333 2019 943 1410 2653 1317
3.0x5.0 1880 2104 1210 2155 2700 1571
3.0x6.0 2160 2583 1485 2470 3292 1888
3.3x4.5 2020 1884 1175 2300 2476 1640
3.3x6.0 2300 2783 1675 2600 3652 2338
3.3x6.5 2700 3015 1814 3080 3961 2532

Note : 

1 Energy represents s the Guarantee energy absorption at 60% deflection.
2 The weight is fender’s body weight without protective net may vary ± 10%
3 Reaction Force, R ± 10%; Deflection: ± 5% and each of the reaction force and energy absorptionare measured under static condition.
4 Special Sizes of others dimension are available upon request. 

Four large-size PneumaticRubber Fenders are usually floated at the water line as primary fenders to absorb impact energy at berthing and keep proper stand-off distance between two ships. Two small-size pneumatic fenders (secondary fenders) are hung high on the hull at both bow and stern of smaller ship to prevent contact from rolling of ships due to swell and wind. "STS Transfer Guide", published by the International Chamber of Shipping (OCIMF), is a good reference for further information.


Test and Inspection for Commercial Floating Pneumatic Rubber Fenders

Acceptance testing and inspection for purchased Pneumatic Rubber Fenders shall be based on the tests and inspections indicated below:

● Material test of rubber — Conducted in accordance with the Physical properties of inner and outer rubber required by ISO 17357:2002
● Dimensional inspection — shall be inspected at the initial internal pressure. Tolerance: +10%, -5%.
● Air-leakage test — shall be conducted at initial pressure for more than 30 min
● Hydrostatic-pressure test — shall be performed for 10 min at the hydrostatic pressure shown in “test pressure at 0% deflection”. Maximum temporary elongation: 10%

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