Jerryborg Marine,safe docking,safe mooring

Certificated 50KPa Yokohama Type Floating Pneumatic Rubber Fender for STS Operation

Group CTN Pneumatic Rubber Fender
Min. Order 1 piece
Terms of Payment L/C, Western Union, T/T, Paypal
Update Time 2019-12-02
Item specifics
Colorblack, white, grey
Production StandardISO17357-1:2014
Rubber Materialvulcanized natural rubber
Fender Diameter500mm-4500mm
Fender Length500mm-12000mm
CertificateCCS, ABS, LRS, BV, GL, DNV, NK
Cage/Nettire & chain net
Fender TypeType I pneumatic fender
Certificated 50KPa Yokohama Type Floating Pneumatic Rubber Fender for STS Operation

1. Background & History 

The "Yokohama  Fender" was developed in 1958. Progress in the development of such floating pneumatic rubber fenders is closely related to the progress and development of ship technology, and has to continuously cope with progressively larger oil tankers such as VLCC's, ULCC's, large gas carriers, bulk carriers and floating structures. Yokohama Fenders are used world wide for ship-to-ship (STS) transfer operations, terminals, and for all kinds of ships. 


In 2006, Chinese company invented new manufacturing method of pneumatic fender based on the manufacturing technique of marine rubber ship launching airbag. Jerryborg Marine is one of the earliest manufacturers in China to produce Yokohama type pneumatic rubber fenders with marine airbag technology.


2. Advantages of Jerryborg Marine Pneumatic Fender

2.1  Safety and Reliability

2.2 Patented Active Protecting Safety Valve Design
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2.3  No Deterioration or Variation in Performance
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2.4  Advantages at Inclined Berthing
Energy absorption of Jerryborg Marine pneumatic fender does not decrease at inclined compression up to 15 degrees.

2.5 Most Cost Competitive System
The utilization of the compressive elasticity of air provides completely uniform surface pressure on contact, making Yokohama Pneumatic Rubber Fenders ideal. The surface pressure of the Yokohama Pneumatic Rubber Fenders is equal to the internal air pressure. 
Due to low and uniform surface pressure properties, the Yokohama Pneumatic Rubber Fenders are popular at LNG-ship terminals. Soft Reaction Force for Ship and Jetty Structure the reaction force of Yokohama Pneumatic Rubber Fenders does not increase sharply, even under excess load conditions. Therefore, the Pneumatic Rubber Fenders perform well in such cases, and protect ships and mooring facilities. 

2.6  Lower Mooring Forces under Rough Weather Conditions
the reaction force and deflection of Yokohama Pneumatic Rubber Fenders do not easily reach the maximum because the reaction force increases slowly and allowable deflection is wide. Thus, the Yokohama Pneumatic Rubber Fenders safely protect ships and mooring facilities even under rough weather.
3. Pneumatic Fender Types
Type I: tire and chain net type
Type II: sling type pneumatic fender
Type III: ribbed type pneumatic fender
Type IV: rubber tape type 
Type V: rubber tube net type
Type VI: hydropneumatic rubber fender
4. Tire & chain net type pneumatic fender structure
5. How to choose select pneumatic fender models ?

Model Selection of Pneumatic Fender for Small & Middle Size Ship

Ship TonnageT

Recommendation Size D x L m

Ship Type

50

0.5 x1.0

Fishing ship

100

0.7 x 1.5~1.0 x 1.5

Fishing ship

200

1.0 x 1.5~1.2 x 2.0

Fishing ship, towing ship

300-500

1.2 x 2.0~1.5 x 2.5

Fishing ship, towing ship

1000

1.5 x 2.5~1.5 x 3.0

Towing ship, cargo ship

3000

2.0 x 3.0~2.0 x 3.5

cargo ship, ocean ships

10000

2.0 x 3.5~2.5 x 4.0

cargo 


Model Selection of Pneumatic Fender for Large-tonnage Ship

Ship Tonnage

DWT)

Assumed Boarding Speed

M/S

Effective Kinetic Energy

KN.M)

Fender Size

D X Lm

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

6. Test and inspection for commercial fenders

Acceptance testing and inspection for purchased fenders shall be based on the tests and inspections indicated in this clause.

 

6.1  Material test of rubber

The material test of the outer rubber and the inner rubber shall be conducted in accordance with the specifications and the results shall satisfy the requirements.

 

6.2 Dimensional inspection

The dimensions of all the fenders shall be inspected at the initial internal pressure and the results shall be within the following tolerances:

a) length: +10 %, −5 % ;

b) diameter: +10 %, −5 %.

The diameter shall be obtained from the average of at least two different measurements taken at the middle of the cylindrical section of the fender.

The diameters of bead ring or other steel material around the flange opening shall be inspected, and the results shall be less than 0,20 D (D: fender diameter).

 

6.3 Air-leakage test

The air-leakage test shall be conducted on all fenders at initial pressure for more than 30 min, and the test results shall confirm that there is no air leakage.

 

6.4 Hydrostatic-pressure test

The hydrostatic-pressure test shall be performed for 10 min at the hydrostatic pressure shown as “Test pressure at 0 % deflection” and there shall be no leakage of water and no defects during the test. The frequency of the test shall be one per 20 fenders of each size and pressure. If the customer so requests, one per order of each size and pressure if the quantity is less than 20. Circumferential and longitudinal lengths shall be measured at 10 kPa pressure and at the test pressure.


7. Pneumatic fender performance