D Rubber Fender Strong Compression Strength Long Lasting Elasticity Reliable Dock Protection
Description
The D Type Fender is a heavy-duty rubber protection system designed to absorb high energy impacts during vessel-to-vessel and vessel-to-dock contact. Its signature “D” shape combines a flat mounting base with a semi-circular compression surface, providing excellent energy absorption with minimal hull pressure. Manufactured from high-performance marine rubber, this fender demonstrates superior resistance to impact fatigue, ozone, seawater corrosion, and mechanical wear.
For tugboats and offshore support vessels, D Type Fenders are critical components that safeguard hulls during pushing, towing, or mooring operations. Hongruntong Marine’s advanced compounding and extrusion technology ensures uniform rubber density, exceptional tensile strength, and excellent resilience under dynamic loading.
Case Study – Offshore Supply Fleet, Singapore
An offshore logistics company in Singapore reported excessive hull damage on its supply vessels due to constant berthing and side-pushing during cargo transfers. The existing flat fenders deformed unevenly and failed prematurely under continuous impact. Hongruntong Marine supplied a customized Heavy-Duty D Type Fender with reinforced internal structure and synthetic rubber compound designed to operate in tropical marine conditions.
After 24 months of service, no structural cracks or performance loss were recorded. Inspection data indicated a 42% improvement in compression recovery, 35% reduction in hull paint damage, and zero unscheduled replacements compared to the previous setup. The client standardized Hongruntong’s D Type Fender design across its entire fleet, citing superior resilience, simplified mounting, and reduced maintenance costs.
Specifications
| Product Name | D Type Fenders |
| Brand Name | Hongruntong Marine |
| Material | High Performance Natural Rubber |
| Color | Black and Customers' Requirements |
| Type | Fixed D Rubber Fenders |
| Standard | HGT2866-2016, PIANC2002 |
| Energy Absorption | 147kN to 920kN |
| Reaction Force | 5.1KN-M to 64KN-M |
| Application | Port, Dock, Quay, etc |
| A | B | C | D | E | F | H | K |
| [mm] | [mm] | [mm] | [mm] | [mm] | [mm] | [mm] | [mm] |
| 70 | 30 | 15 | 30 | 45 | 80 | 90 - 130 | 200 - 300 |
| 100 | 45 | 15 | 30 | 50 | 100 | 90 - 130 | 200 - 300 |
| 125 | 60 | 20 | 40 | 60 | 125 | 110 - 150 | 250 - 300 |
| 150 | 75 | 20 | 40 | 75 | 150 | 110 - 150 | 250 - 300 |
| 150 | 80 | 25 | 50 | 100 | 200 | 130 - 180 | 300 - 400 |
| 200 | 100 | 25 | 50 | 100 | 200 | 130 - 180 | 300 - 400 |
| 200 | 100 | 30 | 60 | 125 | 250 | 140 - 200 | 350 - 450 |
| 250 | 125 | 30 | 60 | 125 | 250 | 140 - 200 | 350 - 450 |
| 300 | 150 | 30 | 60 | 150 | 300 | 140 - 200 | 350 - 450 |
| 350 | 175 | 35 | 75 | 175 | 350 | 140 - 200 | 350 - 450 |
| 380 | 190 | 35 | 75 | 190 | 380 | 140 - 200 | 350 - 450 |
| 300 | 150 | 35 | 75 | 175 | 400 | 140 - 200 | 350 - 450 |
| 400 | 200 | 35 | 75 | 200 | 400 | 140 - 200 | 350 - 450 |
| 500 | 250 | 45 | 90 | 250 | 500 | 160 - 230 | 400 - 500 |
| *Note: Other sizes can be customized according to the requirements. | |||||||
| A | B | C | D | E | F | G | H | K |
| [mm] | [mm] | [mm] | [mm] | [mm] | [mm] | [mm] | [mm] | [mm] |
| 100 | 25 | 10 | 30 | 15 | 100 | 50 | 90 - 130 | 200 - 300 |
| 150 | 30 | 12 | 65 | 20 | 150 | 75 | 110 - 150 | 250 - 350 |
| 200 | 45 | 15 | 75 | 25 | 200 | 100 | 130 - 180 | 300 - 400 |
| 250 | 50 | 20 | 100 | 30 | 250 | 125 | 140 - 200 | 350 - 450 |
| 300 | 60 | 25 | 125 | 30 | 300 | 150 | 140 - 200 | 350 - 450 |
| 350 | 70 | 25 | 150 | 35 | 350 | 175 | 140 - 200 | 350 - 450 |
| 400 | 80 | 30 | 175 | 35 | 400 | 200 | 140 - 200 | 350 - 450 |
| 400 | 80 | 30 | 200 | 35 | 400 | 200 | 140 - 200 | 350 - 450 |
| 500 | 100 | 30 | 250 | 35 | 500 | 250 | 140 - 200 | 350 - 450 |
Features
Reinforced Compression Strength
Engineered with optimized rubber compounds and thick wall geometry, the D Type Fender withstands heavy lateral pressure from tugs and support vessels. The internal hollow design balances flexibility and rigidity, ensuring consistent energy absorption even under repeated high-load cycles.
Superior Fatigue and Tear Resistance
The rubber formulation includes reinforcing fillers that enhance resistance to tearing and permanent deformation. The fender retains its original shape and elasticity even after prolonged exposure to tidal movements and vessel impacts.
Customizable Lengths and Profiles
Hongruntong Marine offers a wide range of D Fender profiles and sizes (D100–D800) to match hull curvature or dock dimensions. Continuous extrusion options allow long-length installation with minimal joint gaps, improving structural integrity.
Ease of Installation and Replacement
The fender’s flat back surface simplifies bolting or welding to vessel sides or quay walls. Modular segments can be replaced individually, minimizing downtime during maintenance or retrofit.
Applications
Tugboats and Push Boats
Installed along bow and sides to absorb repeated impact during berthing, pushing, and towing.
Offshore Supply and Support Vessels
Provides reliable hull protection during supply transfers and side contact with rigs or barges.
Cargo Barges and Workboats
Ensures smooth berthing and prevents structural stress in frequent loading operations.
Why Choose Hongruntong Marine
Marine Grade Rubber Compounding Expertise
Each fender uses a specialized blend of natural and synthetic rubbers formulated for maximum tensile and tear strength. Laboratory testing ensures stable hardness, impact elasticity, and deformation recovery.
Precision Extrusion and Curing Process
Hongruntong utilizes advanced continuous extrusion and high-pressure curing to achieve uniform wall thickness, ensuring even deflection behavior and reliable energy absorption.
Proven Offshore Application Record
Our D Type Fenders are in service on offshore fleets in Southeast Asia, the Middle East, and Europe. Customers report extended service life and lower maintenance costs compared to conventional products.
Comprehensive After-Sales Support
From design consultation to mounting guidance and lifecycle monitoring, Hongruntong provides complete technical support. Clients receive detailed drawings, inspection reports, and performance documentation.
FAQ
1. Can D Type Fenders be installed on curved hull surfaces?
Yes, the flexible structure and customized profiles allow mounting on both flat and curved vessel surfaces.
2. What materials are used in the fender?
A blend of high-grade natural and synthetic rubber ensures excellent impact resistance and long-term elasticity.
3. How are the fenders attached to tugboats?
Common methods include bolting, U-channel steel inserts, or welded mounting brackets, depending on hull design.
4. Do they require regular maintenance?
Only periodic inspection and cleaning. The material resists oil, salt, and UV, minimizing upkeep.
5. Can Hongruntong customize colors or dimensions?
Yes, lengths, diameters, and colors can be customized according to vessel or dock requirements.
