Port Fenders Robust Design High Energy Dissipation Superior Weather Resistance

Port Fenders Robust Design High Energy Dissipation Superior Weather Resistance

Description

The Cylindrical Marine Fender remains one of the most trusted and widely applied fender types in the maritime industry due to its simple structure, excellent performance, and flexible mounting options. Designed for high energy absorption and low reaction force, this fender effectively minimizes damage during berthing operations for a wide variety of vessels.

Hongruntong’s Cylindrical Fenders are produced from top-grade natural and synthetic rubber blends through advanced extrusion and continuous vulcanization. Each fender undergoes strict dimensional and hardness testing to ensure stable compression response and long-term performance in both cold and tropical marine environments. The result is a durable, cost-efficient solution for shipyards, offshore terminals, and heavy-duty berths.

Unlike flat-type fenders, cylindrical fenders deform uniformly along their length, creating a gentle contact area that reduces pressure on the ship hull. Their rounded design allows for smooth rolling motion during contact, making them ideal for berths that accommodate vessels of varying freeboard levels.

Case Study – Zhoushan Shipyard, China

In 2022, a major shipyard in Zhoushan carried out a drydock upgrade project to accommodate a new series of 50,000 DWT bulk carriers. The existing square panel fenders could not handle repeated berthing impacts during repair and launching cycles, causing hull scratches and requiring frequent replacement.

Hongruntong Marine was contracted to design and supply a custom cylindrical fender system for the shipyard’s refit docks. The selected fenders (Ø1200 × 4000 mm) were made with enhanced wear-resistant rubber compounds and fitted with galvanized mounting chains for vertical suspension. The installation was completed within two weeks with minimal structural modification.

After six months of operation, the shipyard reported a 55% reduction in hull contact damage and a significant decrease in maintenance costs. The flexible fender design allowed smooth hull alignment during launching operations, improving safety and efficiency.

This project demonstrated how Hongruntong’s engineering expertise and customized fender systems can optimize shipyard productivity and reduce operational risks while maintaining long-term reliability.

Specifications

Features

High Resilience Rubber Structure
Hongruntong’s Cylindrical Fenders are made from a balanced composition of natural and synthetic rubbers, ensuring superior tensile strength, elongation, and tear resistance. The vulcanized surface layer protects against seawater, UV, and ozone degradation, ensuring performance stability over years of continuous use.

Adaptable Design and Mounting Options
These fenders can be installed horizontally or vertically depending on berth requirements. Chain-suspended systems allow for rolling motion during vessel contact, reducing shear stress. The modular design also enables easy replacement or extension, providing flexibility in both permanent and temporary installations.

Outstanding Energy Absorption with Minimal Hull Stress
The circular profile distributes load evenly and deforms predictably under pressure, providing controlled energy absorption and reducing localized hull damage. This makes them particularly suitable for shipyards where multiple vessel types frequently berth at the same dock.

Cost Efficient Operation and Longevity
With their simple structure and high durability, Cylindrical Fenders require little maintenance over their service life. The absence of metal inserts eliminates corrosion risk, while the homogeneous rubber body ensures uniform performance even after thousands of impact cycles.

Applications

Shipyards and Repair Docks
Ideal for protecting vessels during maintenance, retrofitting, and launching operations.

Bulk Carrier and Ro Ro Berths
Provides consistent energy absorption for high-berthing-frequency environments.

Floating and Temporary Berthing Facilities
Lightweight, easily suspended, and quickly installed for multipurpose docking areas.

Why Choose Hongruntong Marine

Precision Engineering and Material Control
All fenders are produced in ISO-certified facilities using automated extrusion systems. Each batch of rubber compound is tested for hardness, tensile strength, and aging resistance to ensure consistent mechanical properties.

Tailor-Made Fender Solutions
Our design team collaborates closely with shipyards and port engineers to tailor fender dimensions, mounting structures, and hardware configurations. Hongruntong’s customization ensures optimal performance even in non-standard berth designs or retrofitted facilities.

Strong Global Supply and Fast Delivery
With production bases in Northern China and partnerships across Asia and Europe, we maintain a large stock of standard fender sizes and accessories. Efficient logistics enable on-time delivery for urgent marine projects worldwide.

Professional After-Sales and Inspection Support
Hongruntong provides complete lifecycle service—from technical drawing to installation supervision and post-delivery inspection. Clients receive continuous support to maintain fender performance and compliance with safety standards.

FAQ

1. What is the main difference between cylindrical and arch-type fenders?
Cylindrical fenders provide more uniform pressure distribution and are easier to install in multiple orientations.

2. Can the fenders be used in cold-weather ports?
Yes, the rubber compounds maintain elasticity and performance in temperatures as low as -40°C.

3. What maintenance is recommended?
Periodic cleaning and chain inspection are sufficient. Rubber surfaces should be kept free from sharp debris.

4. Is customization available for color or mounting system?
Yes, both black and colored fenders are available, and mounting accessories can be fully customized.

5. How long is the typical service life?
With normal use and inspection, Hongruntong Cylindrical Fenders typically last 10–15 years.