Marine D Fender Lightweight Flexible Design Provides Reliable Collision Safety

Product Specification

Marine D Fender Lightweight Flexible Design Provides Reliable Collision Safety

Description

The D Type Fender by Hongruntong Marine is a robust and efficient fendering solution specially developed for modern port and terminal infrastructure. Designed to absorb impact energy during berthing and mooring, it provides reliable protection for quay walls, piers, and concrete structures exposed to constant contact with vessels of various sizes. The D-shape configuration, featuring a solid mounting base and semi-circular compression surface, allows the fender to distribute collision forces evenly while minimizing reaction load on both the structure and vessel hull.

Manufactured using high-quality natural and synthetic rubber blends, the D Type Fender exhibits excellent resilience, weather resistance, and mechanical stability. The extrusion process ensures uniform wall thickness and high dimensional accuracy, which is critical in large-scale port installations where performance consistency across hundreds of meters of fendering is essential. The product’s modular design allows easy replacement of worn sections, significantly reducing maintenance time and operational downtime.

Case Study – Port of Busan, South Korea

At one of Asia’s busiest container terminals, existing concrete-edge bumpers suffered rapid deterioration due to continuous berthing of 2,000–4,000 DWT feeder vessels. Frequent replacement and surface cracking increased operational costs and downtime. Hongruntong Marine proposed a full conversion to Heavy-Duty D Type Fenders along the quay wall.

The installation included 420 meters of continuous D300 fender sections mounted with galvanized steel bolts and pre-fabricated backing plates. The fenders provided consistent compression performance and high energy absorption even during repeated impacts from loaded cargo ships.

After three years of continuous operation, inspections confirmed no visible material cracking, over 45% reduction in structure impact stress, and zero unplanned replacements. The port authority estimated annual maintenance savings of over USD 120,000, while vessel operators reported smoother docking and faster turnaround times.

This project validated Hongruntong’s D Type Fender as a high-value, low-maintenance solution for major commercial ports.

Specifications

Features

Uniform Energy Absorption Across Long Installations
Advanced extrusion techniques ensure dimensional uniformity, delivering consistent performance over long quay wall installations. Each section provides reliable energy absorption without local stress points or uneven deflection.

Excellent Environmental and UV Resistance
The fender material is treated with anti-ozone, anti-aging, and UV stabilizing compounds, ensuring long-term resilience under sunlight, seawater, and chemical exposure typical of coastal installations.

High Structural Integrity and Impact Strength
Designed for repeated berthing operations, the rubber compound resists compression fatigue and cracking. The D Type Fender maintains performance across temperature fluctuations from -40°C to +80°C, making it suitable for global port climates.

Ease of Installation and Modular Maintenance
Standardized mounting holes and lengths simplify installation along concrete or steel structures. Worn sections can be replaced individually, minimizing dock closure time during maintenance.

Applications

Container Terminals and Quay Walls
Protects high-traffic docking areas from vessel impact, reducing maintenance on concrete or steel edges.

Bulk Cargo and Ro Ro Ports
Ensures safe and smooth berthing during loading operations where frequent contact occurs.

Fishing Harbors and Public Piers
Provides long-lasting impact protection for small vessels, ferries, and coastal workboats.

Why Choose Hongruntong Marine

Engineering Level Design Expertise
Hongruntong Marine collaborates with port authorities, civil contractors, and shipyard engineers to deliver customized fendering systems that meet exact performance criteria, including energy absorption, deflection rates, and load resistance.

Comprehensive Quality Management
Each D Type Fender is subjected to mechanical property testing—tensile, elongation, hardness, and compression recovery. Our manufacturing process adheres to ISO 9001 and PIANC recommendations, ensuring international compliance.

Field Proven Longevity
Installations across major ports in Asia, Europe, and the Middle East have demonstrated fender lifespans exceeding ten years with minimal maintenance. Hongruntong products have become synonymous with reliability in high-frequency docking environments.

Global Logistics and Support
We provide full project support—from technical drawings and custom steel accessories to on-site installation assistance and post-installation inspection. Global clients benefit from fast delivery and responsive after-sales service.

FAQ

1. What fender sizes are recommended for container terminals?
Sizes typically range from D300 to D500 depending on vessel displacement and quay structure strength.

2. Can Hongruntong provide installation hardware?
Yes, complete mounting kits, including bolts, backing plates, and anchor templates, are available.

3. What is the typical replacement interval?
Average service life exceeds 10 years, depending on berthing frequency and environmental exposure.

4. Are D Type Fenders suitable for concrete and steel structures alike?
Yes, both surface types can be equipped with appropriate mounting systems.

5. How does the fender perform under low-temperature conditions?
The rubber maintains flexibility and energy absorption down to -40°C without surface cracking or stiffness loss.