What is the use of pneumatic rubber fender?
06/26/2025
Inflated Innovation: Ship Airbags in Heavy Lifts
06/26/2025
What is the use of pneumatic rubber fender?
06/26/2025
Inflated Innovation: Ship Airbags in Heavy Lifts
06/26/2025

Why Choose Pneumatic Rubber Fenders for Marine Safety

You want your vessel to be very safe. Pneumatic rubber fenders absorb energy well and keep hull pressure low. This helps keep you safe when you dock or move cargo. Many marine professionals trust NANHAI for good quality and strong performance. When you need to keep your ship and crew safe, you can trust this solution.

Key Takeaways

  • Pneumatic rubber fenders keep ships safe by absorbing impact energy and spreading the force out. This helps stop damage to the ship’s hull and the dock. These fenders have a tough but bendy design with air inside. This makes them soft on ships and still works well in bad weather or hard docking spots. They last for many years, can handle cold weather, and only need easy care like checking air pressure once a year. When you compare them to solid rubber and foam fenders, pneumatic fenders give a good mix of safety, price, and easy use. Picking the right size and caring for your fender the right way helps it work well and keeps your ship safe for a long time.

What Is a Pneumatic Rubber Fender

pneumatic fenders

Structure

When you look at a pneumatic rubber fender, you see a tough, air-filled bumper made for the sea. The main body uses strong rubber and layers of cord to keep it flexible but sturdy. You will find two main flange types that connect the fender to chains and other hardware:

  • Ball Type Flange
    • Rotating ring
    • Inner flange (inside the fender)
    • Outer flange (bolted outside)
    • Nuts and bolts
    • Chains
    • Shackles
  • Cage Type Flange
    • Outer flange connects to a tire-chain mesh
    • Load spreads through a cage-like net

If you use a smaller fender, you might see the ball type. For bigger jobs, the cage type gives you more strength and safety. The fender’s diameter, often 1 meter or more, helps decide which flange fits best.

How It Works

A pneumatic rubber fender protects your ship by absorbing energy when things get rough. When a vessel bumps against a dock or another ship, the fender squishes and spreads out the force. This keeps your hull safe and lowers the risk of damage. Here’s a simple look at how it works:

AspectWhat Happens
Energy AbsorptionThe fender turns the ship’s movement into strain energy inside the rubber. The rubber stretches and bounces back, soaking up the impact.
Material FactorsThe rubber’s stretchiness, the shape, and the layers all help the fender absorb more energy.
Impact ForceThe fender changes shape to spread the force, so no single spot takes all the pressure.
SafetyThis design keeps your ship and the dock safe, even during hard landings.

Applications

You can use a pneumatic rubber fender in many places. Ships use them when docking at ports, oil terminals, or during ship-to-ship transfers. They work well for both small boats and giant tankers. You will also see them at busy harbors and offshore platforms. Their strong build and easy setup make them a favorite for anyone who wants to keep vessels and docks safe.

Benefits

Energy Absorption

When you use a pneumatic rubber fender, you get top-notch energy absorption. This fender acts like a cushion between your ship and the dock. It takes the force from a moving vessel and spreads it out. You do not have to worry about sudden jolts or hard impacts. The air-filled core and flexible rubber layers work together to soak up kinetic energy. This means less stress on your ship and the dock.

Tip: The fender’s design lets it handle impacts from different angles, even up to 15 degrees. So, you stay protected during tricky berthing situations.

Low Surface Pressure

You want to keep your ship’s hull safe. A pneumatic rubber fender does this by spreading out the force over a large area. The soft, air-filled body presses gently against the hull. This keeps the surface pressure low and prevents dents or scratches. Even when your vessel is heavy or the sea is rough, the fender keeps the pressure steady and safe.

  • The fender’s elasticity helps it mold to the shape of your ship.
  • You avoid sharp points of contact that can cause damage.
  • This makes it perfect for both small boats and giant tankers.

Durability

You need a fender that lasts. Pneumatic rubber fenders have a strong, multi-layer build. They use tire-cord reinforcement to resist cuts, pressure, and shearing. These fenders keep working even in freezing cold, down to -50°C. You can count on them for 7 to 10 years under normal use. They also meet top certifications like ISO 17357:2014 , CCS, DNV, and LR.

Here’s a quick look at how different sizes perform:

Fender Size (Diameter x Length)Compression Amount (60%)Reaction Force (kN)Energy Absorption (kNm)Lifespan (Years)Certifications
500mm x 1000mm60% compression6467-10ISO17357:2014, CCS, DNV, LR
1000mm x 1500mm60% compression182327-10ISO17357:2014, CCS, DNV, LR
1500mm x 3000mm60% compression5791537-10ISO17357:2014, CCS, DNV, LR
2500mm x 4000mm60% compression113816637-10ISO17357:2014, CCS, DNV, LR
3300mm x 6500mm60% compression301518147-10ISO17357:2014, CCS, DNV, LR

You also get extra peace of mind with these features:

  • Advanced rubber stays flexible in cold weather and does not crack.
  • Hybrid materials boost energy absorption and resilience.
  • Protective coatings keep out moisture and ice.
  • Smart fenders can even monitor their own condition with sensors.
  • Modular parts make repairs easy if you ever need them.

Easy Maintenance

You do not want to spend all your time fixing equipment. Pneumatic rubber fenders make your life easier. You only need to check the air pressure once a year. If your fender has a chain net, you might replace it every 3-4 years. The fender’s tough build means you do not have to worry about small bumps or rough weather. Most problems are easy to spot and fix.

Note: Regular checks help your fender last longer and keep your ship safe.

With a pneumatic rubber fender, you get strong protection, long life, and simple care. You can focus on your work, knowing your vessel and dock are safe.

Comparison with Other Fenders

cone fenders

Solid Rubber Fenders

Solid rubber fenders are made from strong rubber blocks or cylinders. They do not have air inside like pneumatic rubber fenders. These fenders are tough and simple. They protect your ship by taking hits, but they push back hard. This can put more pressure on your ship’s hull. If you dock at an angle, the force does not spread out well. Over time, these fenders can change shape. When this happens, they do not protect as well. You do not need to check air pressure. But if they lose their shape, you might need to get new ones.

Here is a table that shows how solid rubber fenders and pneumatic rubber fenders compare:

Performance MetricSolid Rubber FendersPneumatic Rubber Fenders
Energy Absorption CapacityCan take up to 40% more energy*Absorb energy with air, spreading force gently, even at angles
Reaction Force BehaviorPuts different pressure on the hullSpreads energy slowly because of air inside
Durability under DamageDo not lose air, but work less well if bentLose air and stop working if they get a hole
Deformation TendenciesCan bend and stop working as wellKeep their shape unless they get a hole
Maintenance NeedsNeed less care, no air checksNeed air checks sometimes

*How well they work depends on who made them and how they are used.


foam fenders

Foam Fenders

Foam fenders have a foam core covered by a strong skin. You see them floating at docks and on ships that need extra safety. If foam fenders get cut, they do not lose air. They keep working, but if the foam gets hurt, they do not absorb energy as well. You do not need to check air pressure with foam fenders. They need less care than pneumatic rubber fenders. But foam fenders can cost more, especially if they are big. They are also heavier, so putting them in place can be harder.

Here is a table to show how foam fenders and pneumatic rubber fenders are different:

FeaturePneumatic FendersFoam-Filled Fenders
Energy AbsorptionTake in lots of energy with low pressure on the hullEnergy absorption changes with foam type; usually good
Risk of DeflationCan lose air or sink if damagedNo risk of losing air because of the foam
MaintenanceNeed air checks and sometimes more airNeed less care, no air checks needed
CostUsually cheaper for big sizesCost more, especially if they are big
DurabilityLast long but can get holesVery strong, skin resists damage and rust

Note: Foam fenders can take in more energy sometimes, but if the foam gets crushed or torn, they do not work as well.

Why Choose Pneumatic Rubber Fender

You want your ship and dock to be safe. A pneumatic rubber fender gives you safety, flexibility, and good value. Here is why you should pick this kind:

  • Gentle on Your Hull: The air inside spreads out the force. Your ship does not get dents or scratches. Even if docking is rough, the pressure stays low.
  • Handles Tough Jobs: You can use it for big tankers, small boats, and more. It works well in bad weather and busy ports.
  • Easy to Move and Install: These fenders are lighter than foam fenders of the same size. You can move them by hand or with simple tools.
  • Cost-Effective: For big ships, you save money because pneumatic rubber fenders cost less than foam fenders. You get strong protection without spending too much.
  • Simple Maintenance: You only need to check the air once a year. If there is a problem, you can fix or change parts fast.

Here is a table to help you see the main differences:

AspectPneumatic FendersFoam-Filled Fenders
Energy AbsorptionTake in energy with air, spreading force evenlyTake in energy with foam; sometimes up to 40% more
Reaction ForceSpreads energy slowly, even at anglesPuts different pressure on the hull
Durability and DamageLose air and stop working if they get a holeDo not lose air, but work less well after damage
MaintenanceNeed air checks and refills once a yearNeed very little care, no air checks
CostUsually cheaper because they use airCan cost up to three times more than pneumatic fenders

If you want a fender that is safe, easy to care for, and a good deal, a pneumatic rubber fender is a smart choice for marine safety.

Selection & Maintenance

Choosing the Right Pneumatic rubber Fenders

Picking the best fender for your vessel keeps your ship and dock safe. You want to look at your ship’s size, weight, and where you plan to use the fender. Think about the weather, water depth, and how much space you have. Here are some things you should check:

  • Ship dimensions and weight
  • Water conditions and dock structure
  • Load capacity and pressure ratings
  • Safety margins for extra protection
  • Material quality and durability
  • Compliance with ISO, CCS, or DNV standards

You also want to match the fender’s size to your ship. Most fenders range from 300 mm to 4,700 mm in diameter and 500 mm to 12,000 mm in length. For smaller fenders, you get them already inflated. Larger ones come deflated for easy transport. Always check that your fender meets ISO17357-1:2014. This standard covers air tightness and pressure checks.

AspectDetails
Industry StandardISO17357-1:2014
Inspection BodiesCCS, BV, ABS
Fender Size RangeDiameter: 300 mm – 4,500 mm; Length: 500 mm – 9,000 mm
Delivery MethodSmall: Inflated; Large: Deflated
Key AdvantageHigh energy absorption, light weight, easy installation

Tip: Ask your supplier for help if you are not sure which fender fits your needs.

Maintenance Tips

You want your pneumatic rubber fender to last as long as possible. Good care starts with proper handling. Always unload and unpack your fender with care. Use lifting slings and avoid sharp objects or hot surfaces. When you inflate your fender, keep the pressure between 4 and 7 kg/cm². Never over-inflate. For storage, keep your fender inflated. This helps it keep its shape and last longer.

Here are some simple steps to follow:

  1. Check air pressure once a year.
  2. Inspect for cuts, cracks, or leaks.
  3. Use galvanized chains for chain-tire-net fenders to stop rust.
  4. Clean off dirt and salt after use.
  5. Follow ISO 17357-1:2014 for all checks.

Note: Most fenders need very little care, but regular checks help you spot problems early.

NANHAI Support

You do not have to figure everything out alone. NANHAI has nearly 20 years of experience with marine fenders. Their team helps you pick the right fender and gives you tips for care and repair. They offer a wide range of products and know how to match the right fender to your ship and port. If you have questions, you can reach out for expert advice. Many ship owners trust NANHAI for their deep knowledge and strong support. You get peace of mind knowing you have a partner who cares about your safety and success.


You want the best protection for your ship. A pneumatic rubber fender gives you strong safety, easy care, and long-lasting use. You can trust NANHAI to help you pick the right fender for your needs. If you want to keep your crew and dock safe, try a pneumatic rubber fender on your next marine project.

Ready to upgrade your marine safety? Reach out to NANHAI for expert advice!

FAQ

How often should you check the air pressure in a pneumatic rubber fender?

You should check the air pressure once a year. This helps your fender work well and last longer. If you notice any leaks or damage, check it right away.

Can you use pneumatic rubber fenders in cold weather?

Yes! Pneumatic rubber fenders work well in freezing temperatures, even down to -50°C. The rubber stays flexible, so you get strong protection all year.

What should you do if your fender gets a hole?

If your fender gets a hole, you should repair it as soon as possible. Most small holes can be patched. For bigger damage, you might need to replace the fender.

Are pneumatic rubber fenders hard to install?

No, you can install them easily. Most fenders are light enough to move by hand or with simple tools. You can also deflate large fenders for easy transport and setup.

💡 Tip: Always follow the manufacturer’s instructions for the best results!