Pneumatic Rubber Fenders Construction and Performance Insights


In marine safety and infrastructure, pneumatic rubber fenders are key. They protect ships and docks from damage during mooring or berthing. They use compressed air as a cushion. These fenders change how ships interact with each other and with ports. They cut the risk of collisions. Collisions can cause big damage.

Jerryborg Marine is widely recognized for its excellence in manufacturing and supplying top-notch pneumatic rubber fenders. These fenders are known for their durability and high performance. They also comply with the tough ISO 17357 standards. These standards ensure that they meet global quality and safety benchmarks. These fenders have unique structural features. They include rubber panels reinforced with synthetic cords. The panels can absorb lots of kinetic energy. This happens during ship-to-ship contact or when the ship is berthing.

Jerryborg Marine Pneumatic Rubber Fenders

Table of Contents

Construction Features and Benefits

Pneumatic rubber fenders have construction features and benefits. These are especially true for those offered by Jerryborg Marine. They integrate engineering precision and innovative materials. These traits set these marine safety devices apart. The fender unit has one core function. It absorbs and dissipates the kinetic energy from boat-to-boat or boat-to-dock hits. It achieves this using our advanced materials and design. This ensures that ships and dock structures are protected even under the most demanding conditions.

Structural Features

At the heart of the pneumatic rubber fender is a synthetic cord-reinforced rubber sheet. We chose this material for its toughness, flexibility, and abrasion resistance. The rubber has a synthetic cord that adds strength. It lets the fender withstand huge pressure without breaking. This support keeps the fender’s shape and strength. It works even under extreme conditions.

Compressed air acts as a spring. It absorbs impact energy well. This reduces the force sent to the hull or dock. This mechanism is critical to reducing damage during berthing. It provides a soft but strong barrier against hard contact between large structures.


Ease of Installation: The fender is light and buoyant due to the air inside it. So, it can be easily positioned and secured with ropes or chains. This ease of installation makes them versatile. They are a good choice for many marine applications. These range from temporary moorings to permanent installations in marinas and harbors.

High Performance Under Compression: The panels are made of rubber reinforced with synthetic cord. They are designed for compression. They provide stable energy absorption at many impact angles. This is especially important in rough sea conditions where vessels may approach the dock at less-than-ideal angles. In such situations, the ability of fenders to absorb energy and reduce reaction forces helps prevent damage to vessels and mooring structures.

Classification according to internal pressure: Pneumatic rubber fenders have internal pressure levels. They are typically 50kPa (Pneumatic 50) and 80kPa (Pneumatic 80). They can be customized to suit the application. Higher-pressure fenders are used where more energy absorption is needed. By selecting the appropriate level of fender, operators can ensure optimum performance and protection for their specific needs.

Jerryborg Marine Pneumatic Rubber Fenders Structural Drawing

Performance Insights

Understanding pneumatic rubber fender performance is critical. It helps us evaluate their effectiveness in maritime safety. Metrics such as Guaranteed Energy Absorption (GEA), reaction force during GEA deformation, and hull pressure during GEA deformation are key. They show how well a fender can protect ships and mooring structures during docking or ship-to-ship interaction. Jerryborg Marine Marine Marine fenders adhere to the ISO 17357 standard and are committed to providing fenders that meet these critical performance benchmarks.

Guaranteed Energy Absorption (GEA)

GEA indicates the maximum amount of energy a fender can absorb during compression. This is a critical indicator. It shows a fender’s ability to reduce the energy of a docked vessel. This lessens potential damage. A higher GEA means the fender can absorb more energy. This makes it suitable for larger vessels or those carrying valuable cargo.

GEA Reaction force during deformation

This indicator measures the force exerted by the fender on the vessel at the point of maximum energy absorption. Fenders should ideally have a low reaction force during GEA deformation. This reduces stress on the hull and keeps the hull and its cargo safe. Jerryborg Marine marine fenders are designed to optimize this balance. They absorb energy well while creating minimal reaction forces.

GEA Hull Pressure during Deformation

GEA Hull Pressure at Deflection is the pressure on the hull. It happens when the fender is compressed to its maximum energy absorption. A lower hull pressure reduces the risk of external damage to the vessel and is therefore a key factor in fender performance. Jerryborg Marine marine fenders use advanced materials and design. They ensure even pressure distribution. This protects the hull’s integrity during impact.

ISO 17357 Compliance

The ISO 17357 standard specifies the material, performance, and size needs for high-pressure pneumatic rubber fenders. Compliance with these standards ensures optimum performance and safety of fender installations. Jerryborg Marine achieves this with tough testing and quality control. They use these measures from material selection to final production. Our fenders comply with the ISO 17357 standard. They work reliably in a wide range of conditions and provide predictable, reliable protection.

Selection Guide

When choosing the right pneumatic rubber fender for your marine needs, you must consider the vessel’s size, its needs, and the environmental conditions it will face. As a leading supplier in this field, Jerryborg Marine offers a wide range of pneumatic rubber fenders to meet these various needs. Below is a concise guide to help you select the right product:

For small to medium-sized vessels: Smaller vessels, like fishing boats and tugboats, need fenders with less energy absorption but more durability. Jerryborg Marine’s 50kPa fenders fit these vessels well. They provide the needed protection without being too bulky. The fenders come in many sizes to fit all types of small and medium vessels.

For Large Commercial Vessels: Vessels like container ships, tankers, and bulk carriers need fenders with high Guaranteed Energy Absorption (GEA). They cope with the large forces when berthing. Jerryborg Marine’s 80kPa fenders are for heavy-duty use to ensure maximum protection.

Customization options

Jerryborg Marine understands that off-the-shelf solutions may not meet all requirements. We offer customization services that allow fenders to be designed to accommodate unique vessel designs, unusual mooring conditions, or specific environmental challenges.

Key Considerations

Operating Environment: Tougher conditions require fender products with higher resilience and performance under varying pressures.

Berthing Frequency and Energy: High-frequency berthing and high energy impacts require fenders with superior energy absorption.

Marina Compatibility: Make sure the fender’s size and type fit the marina. This will increase safety and efficiency.

By picking rubber fenders that fit the vessel’s size and needs, marine operations can greatly improve safety. They can also reduce damage during docking and mooring.

Jerryborg Marine Pneumatic Rubber Fenders Structural Drawing


Jerryborg Marine’s pneumatic rubber fenders combine durability, performance, and ISO 17357 standards. By integrating synthetic cord-reinforced rubber and optimizing internal air pressure, we manufacture fenders with excellent energy absorption to protect ships and docking structures from impact. Customization can also be catered for, so feel free to contact our team for any customization needs.


Jerryborg Marine complies with ISO 17357 through rigorous quality control measures, starting with material selection and continuing throughout the manufacturing process. The standards set out in ISO 17357 ensure that pneumatic rubber fender products are durable, reliable, and able to perform under specific conditions. Jerryborg Marine ensures compliance through the use of high-quality synthetic cord Compliance is ensured through the use of high-quality synthetic cord reinforced rubber and by maintaining precise control of the air pressure inside the fender, which is essential for optimum energy absorption and performance.

The durability and performance of Jerryborg Marine pneumatic rubber fenders are a direct result of their construction features. The use of synthetic core-reinforced rubber sheets provides superior strength and toughness, allowing the fender to withstand harsh marine conditions and heavy impacts without noticeable wear. In addition, careful calibration of the internal air pressure enhances the fender’s ability to absorb energy, ensuring effective protection for vessels and mooring structures.

Yes, we offer customized options for our marine pneumatic rubber fenders. Understanding that offshore operations and vessel requirements vary greatly, we have the flexibility to customize the size and specification of the fenders to meet specific needs.


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