YOKOHAMA Floating Fenders

Features

1. Soft Reaction Force for Ship and Jetty Structure

Although all fenders should be used within their maximum load limit, it often happens that fenders accidentally receive excess load. The reaction force of Yokohama Pneumatic Rubber Fenders does not increase sharply, even under excess load conditions. Therefore, the Yokohama Pneumatic Rubber Fenders perform well in such cases, and protect ships and mooring facilities. In contrast, the reaction force of solid rubber fenders, including buckling-type fenders, increases sharply under excess load conditions. The excess load turns the solid-type fender into a solid rubber block, which cannot perform as a fender. This often leads to damage of the ship and mooring facilities.

Soft Reaction Force for Ship and Jetty Structure

Soft Reaction Force for Ship and Jetty Structure

2. 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.

(a) Pneumatic Fender

(a) Pneumatic Fender

(b) Solid Fender

(b) Solid Fender

(c) Foam Fender

(c) Foam Fender

Reduction of Energy Absorption at Inclined Berthing for Pneumatic, Solid and Foam Fender

In the case of Yokohama Pneumatic Rubber Fenders, energy absorption does not decrease at inclined compression up to 15 degrees.

(a) Pneumatic Fender

(a) Pneumatic Fender

(b) Solid Fender

(b) Solid Fender

(c) Foam Fender

(c) Foam Fender

Load Distribution at Inclined Berthing for Pneumatic, Solid and Foam Fender

Distribution of load is also comparatively even because of the molecular freedom of air and high flexibility of the multi-layered cord-reinforced rubber membrane. This makes the body of a pneumatic rubber fender more shape conformant compared to solid or foam fenders, and thus able to better distribute the load along the hull of a ship or jetty structure during inclined compression.

Floating Fender Products

Type I (Net Type)

Net-type fenders (TypeⅠ) are covered with a chain net, wire net or fiber net for small size fenders. Usually these nets have used-tires together with rubber sleeves for additional protection, except fiber net which has only rubber sleeves. Chain nets last longer against corrosion, while wire nets are light and more easily repaired.

Type II (Sling Type)

Sling-type fenders (TypeⅡ)Φ500×1000L - Φ4500×9000L have an attachment eye on each end for lifting and installation. Handling of sling type fenders is easy due to their lightweight.

Rubber Sleeve Net

Rubber sleeve nets cover the chain net completely by strong rubber sleeves. The rubber sleeve is made of rubber reinforced with synthetic-tire-cord. The standard colors of the rubber sleeve are black and orange.

Aircraft Tire Chain Net

Aircraft tire chain nets use air craft tires, instead of automobile tires, to keep larger stand-off distance and enough protection for the fender body.

Double Cover (DC)

Double cover consists of a single cover with an extra tyre cord layer and outer rubber.
It is better resistance to operational damage such as abrasion, cuts and gauges.

Single Cover Construction

Single Cover Construction

Double Cover Construction

Double Cover Construction

Grey Rubber

Grey rubber is a specially formulated rubber with color compound added. Creamy white color can be requested instead of grey color as an alternative.

Grey Rubber

Vertical

Vertical-Pneumatic Rubber fenders arespecially designed pneumatic fenders that can be water-ballasted and installed vertically.
They are popular with vessels whose berthing point is below the water line such as catamaran ships, semi-submersibles platforms or other submersibles.

Vertical

ISO17357-1 : 2014 : Certified

COMPLIANCE WITH ISO17357-1:2014

The new ISO standard for the high pressure pneumatic fender was published in 2014. ISO17357-1:2014 “Ships and marine technology - Floating pneumatic rubber fenders - Part 1: High pressure”, which supersedes the former standard published in 2002, has set the new requirements with respect to design, material and the mandatory performance testing to enhance product reliability. As an industry leader of the pneumatic fenders, Yokohama has contributed in establishing a new standard by providing technical expertise derived from our long years of experience.

Needless to say, all Yokohama fenders are in full compliance with ISO17357-1:2014.

For your information, the followings are the new requirements:

Structure of ISO17357-1:2014

Structure of ISO17357-1:2014

New Requirement

(1) Diameter of the bead ring or other steel material around the flange opening shall be less than 0.20 D (D: fender diameter) to make metal parts safe from permanent deformation when it gets over compression near to 80%.

(1)

(2) The performance confirmation of prototype fender test shall be done every ten years.

(3) Layer made of synthetic-tyre-cord fabric, which maintains the internal air pressure of the fender. The canvas fabric shall not be used for the high pressure pneumatic floating fender.

Synthetic-tyre-cord

Synthetic-tyre-cord

Synthetic-tyre-cord
Canvas fabric

Canvas fabric

Size and Performance Table

Performance Table

Pneumatic 50 Standard Sizes

* Click the size to see the performance curve

Nominal
Size
Diameter x
Length
Initial
Internal
Pressure
Guaranteed
Energy
Absorption
(GEA)
Reaction
Force
at GEA
Hull
Pressure
at GEA
Safety
Valve
Setting
pressure
Testing
Pressure
Weight of Net Type(TypeI) Weight
of
Sling
Type
(TypeII)
Approx.
Fender
Body
Weight
Approx. Weight
of Net
E R P Chain
Net
Wire
Net
Synthetic
Fiber
Net
(mm x mm) (kPa) (kNm) (kN) (kPa) (kPa) (kPa) (kg) (kg) (kg) (kg) (kg)
500 x 1000 50 6 64 132 - 200 22 110 30 20 28
600 x 1000 50 8 74 126 - 200 25 120 30 22 32
700 x 1500 50 17 137 135 - 200 45 150 40 37 51
1000 x 1500 50 32 182 122 - 200 73 200 80 51 89
1000 x 2000 50 45 257 132 - 200 88 220 140 57 104
1200 x 2000 50 63 297 126 - 200 131 320 190 68 147
1350 x 2500 50 102 427 130 - 200 200 350 200 - 229
1500 x 3000 50 153 579 132 - 200 250 530 350 - 279
1700 x 3000 50 191 639 128 - 200 290 580 440 - 320
2000 x 3500 50 308 875 128 - 200 405 960 640 - 459
2500 x 4000 50 663 1381 137 175 250 902 1240 910 - 1080
2500 x 5500 50 943 2019 148 175 250 1090 1850 1160 - 1320
3300 x 4500 50 1175 1884 130 175 250 1460 1710 1270 - 1800
3300 x 6500 50 1814 3015 146 175 250 1870 2570 1910 - 2180
3300 x 10600 50 3067 5257 158 175 250 2560 4660 3300 - 3060
4500 x 9000 50 4752 5747 146 175 250 3940 5390 3520 - 4560
4500 x 12000 50 6473 7984 154 175 250 4790 6990 5190 - -

Pneumatic 80 Standard Sizes

* Click the size to see the performance curve

Nominal
Size
Diameter x
Length
Initial
Internal
Pressure
Guaranteed
Energy
Absorption
(GEA)
Reaction
Force
at GEA
Hull
Pressure
at GEA
Safety
Valve
Setting
pressure
Testing
Pressure
Weight of Net Type(TypeI) Weight
of
Sling
Type
(TypeII)
Approx.
Fender
Body
Weight
Approx. Weight
of Net
E R P Chain
Net
Wire
Net
Synthetic
Fiber
Net
(mm x mm) (kPa) (kNm) (kN) (kPa) (kPa) (kPa) (kg) (kg) (kg) (kg) (kg)
500 x 1000 80 8 85 174 - 250 24 110 30 20 30
600 x 1000 80 11 98 166 - 250 27 120 30 22 34
700 x 1500 80 24 180 177 - 250 47 150 40 37 53
1000 x 1500 80 45 239 160 - 250 76 200 80 51 92
1000 x 2000 80 63 338 174 - 250 92 220 140 57 108
1200 x 2000 80 88 390 166 - 250 135 320 190 68 151
1350 x 2500 80 142 561 170 - 250 205 350 200 - 234
1500 x 3000 80 761 174 - 250 277 530 350 - 306
1700 x 3000 80 267 840 168 - 250 316 580 440 - 346
2000 x 3500 80 430 1150 168 - 250 413 970 690 - 467
2500 x 4000 80 925 1815 180 230 300 1010 1250 910 - 1190
2500 x 5500 80 1317 2653 195 230 300 1230 1860 1170 - 1460
3300 x 4500 80 1640 2476 171 230 300 1720 1720 1280 - 2050
3300 x 6500 80 2532 3961 191 230 300 2200 2580 1990 - 2530
3300 x 10600 80 4281 6907 208 230 300 3030 4660 3300 - 3520
4500 x 9000 80 6633 7551 192 230 300 4380 5440 3580 - -
4500 x 12000 80 9037 10490 202 230 300 5330 7030 5230 - -

Vertical-Pneumatic

Nominal Size
Diameter x Length
Initial Internal Pressure Weight of Fender Body
(mm x mm) (kPa) (kg)
2000 x 6000 50 1000
2500 x 9100 50 2200
3300 x 6500 50 3000
3300 x 8600 50 3600
3300 x 10600 50 4100
4500 x 9000 50 5810
4500 x 12000 50 7680

Low-Pressure

Nominal Size
Diameter x Length
Initial
Internal
Pressure
Guaranteed
Energy
Absorption
GEA
Reaction
Force at
GEA
Hull
Pressure
at GEA
Testing
Pressure
Weight of
Sling Type
(TypeII)
E R p
(mm x mm) (kPa) (kNm) (kN) (kPa) (kPa) (kg)
2500 x 9100 10 676 1901 88 40 1190
3300 x 12700 10 1565 3439 89 40 1930

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