Pneumatic fenders, also known as Yokohama fenders, use air as a medium to absorb impact forces, making docking operations more flexible and preventing collisions. These fenders are known for their high energy absorption, low reaction force, simple installation, good elasticity, no deformation, lightweight, and cost-effectiveness. They are widely used on oil tankers, container ships, luxury yachts, offshore platforms, large docks, and naval ports, becoming an indispensable part of ship and port protection.
Table of Contents
Basic Uses of Pneumatic Fenders
Pneumatic fenders are primarily used to reduce impact forces and protect both the ship and the dock. During docking or undocking, pneumatic fenders effectively absorb impact forces, minimizing damage to the ship and dock. Additionally, they provide flexible protection to the hull, preventing wear and damage caused by direct hard contact.Common applications are:
- Oil tankers
- High-speed ferries
- Temporary and permanent facilities
- Ports with significant tidal changes
- Ship-to-ship transfer operations
- Naval vessels
Choosing the Right Pneumatic Fender
When selecting the appropriate size and model of pneumatic fender, consider the type of ship and docking scenario. Here are the recommended fender sizes:
For Small and Medium Ships
Tonnage (T) | Recommended Size D x L (m) | Ship Type |
500 | 0.5 x 1.0 | Fishing Ship |
1000 | 0.7 x 1.5 ~ 1.0 x 1.5 | Fishing Ship |
2000 | 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 |
10000 | 1.5 x 2.5 ~ 1.5 x 3.0 | Towing Ship, Cargo Ship |
30000 | 2.0 x 3.0 ~ 2.0 x 3.5 | Cargo Ship, Ocean Trawler |
100000 | 2.0 x 3.5 ~ 2.5 x 4.0 | Cargo Ship |
For Large Ships
Tonnage (DWT) | Assumed Docking Speed (M/S) | Effective Energy (KN.M) | Fender Size D x L (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 | 0.2 | 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 |
Installation and Deployment
Inflation Procedure:
- Remove the inflation rod from the fender toolbox and connect it to the fender’s inflation valve.
- Use a wrench to remove the valve core.
- Connect the quick connector for inflation and inflate the fender to 0.05 MPa or 0.08 MPa according to its working pressure.
- After inflation, close the valve and check the pressure.
- Use a wrench to screw on the valve core, completing the inflation process.
Fixing Devices: Typically, anchor chains or ropes are used to connect the flanges at both ends of the fender, securing it to the dock or pier to prevent movement or drifting during use.
Inflation and Maintenance
Inflation:
- Follow the above inflation procedure to ensure the pressure is within the correct range.
Maintenance:
- Regularly check the inflation pressure, fixing devices, and surface wear or damage of the pneumatic fender.
- If wear is detected, use the repair tools in the toolbox for patching.
- Regularly clean the fender surface to maintain optimal performance.
Coordination with Other Protective Equipment
In different ship and port scenarios, pneumatic fenders can be used in conjunction with other protective equipment (such as ropes and pier protection) to enhance overall protection.
- Using ropes with pneumatic fenders can enhance stability during docking, preventing ship displacement due to strong winds and waves, and protecting the dock.
- When used with pier protection facilities, pneumatic fenders can serve as the first line of defense, absorbing most of the impact energy and extending the lifespan of pier protection facilities.
Conclusion
Key Steps and Precautions for Proper Use of Pneumatic Fenders:
- Select the appropriate fender size and internal pressure.
- Inflate the fender before installation and check for air tightness.
- Inspect the fender surface for wear or punctures before installation.
- Follow correct procedures for inflation and installation.
- Regularly maintain and inspect the pneumatic fender.
Precautions:
- Avoid damaging the inflation valve during inflation.
- Prevent the fender from contacting sharp objects during use.
- Keep the fender away from acids, alkalis, greases, and organic solvents.
Pneumatic fenders not only enhance the safety and efficiency of port management but also reduce maintenance costs, promoting sustainable development of ports. As a professional pneumatic fender manufacturer, Henger Shipping Supplies is committed to providing the most reliable protection solutions for our customers.