Port Rubber Fender High Performance Anti Aging Corrosion Proof Invariant Type
Description
D Type Fenders serve as dependable protective systems in shipbuilding and dry dock environments where controlled contact and structural safeguarding are essential during vessel construction and maintenance phases.
Manufactured with high-elasticity rubber and reinforced density control, these fenders prevent steel-to-steel contact damage during hull alignment, outfitting operations, and maneuvering within confined dock spaces.
Case Study – Large Vessel Dry Dock Protection
A shipyard constructing 85,000 DWT bulk carriers required durable side protection inside dry dock chambers. After installing 400 mm D Type Fenders along dock walls, hull coating damage during positioning was significantly reduced. Maintenance teams confirmed improved operational safety and minimized repainting requirements, resulting in measurable time savings per vessel cycle.
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
High Elastic Recovery for Low Speed Maneuvering
In shipyard and dry dock operations, vessel movements typically occur at controlled but continuous low speeds. The D Type Fender’s geometry allows gradual compression under these conditions, providing sufficient cushioning without generating excessive rebound force that could destabilize alignment. The rubber’s molecular cross-link structure ensures rapid elastic recovery after each compression cycle, preventing cumulative deformation and maintaining consistent performance over time.
Superior Tear and Abrasion Resistance
During vessel alignment, lateral friction often occurs along the fender surface. Hongruntong Marine utilizes rubber compounds formulated with enhanced tear resistance and high tensile strength to prevent surface splitting or edge cracking. Laboratory abrasion simulations confirm that the material retains structural integrity even after prolonged mechanical contact with steel hull plating, anchor chains, or docking equipment.
Dimensional Stability Under Sustained Load
Dry dock operations sometimes involve prolonged static contact between vessel hull and dock wall. The internal density and compound composition of our D Type Fenders minimize creep deformation during extended compression periods. This ensures that the fender maintains its original geometry and continues to provide uniform load distribution without flattening or hardening.
Optimized Mounting Interface for Structural Safety
The flat rear surface enables secure bolting against reinforced concrete or steel dock walls. Pre-drilled mounting holes are precisely aligned to reduce installation stress and prevent uneven compression. Optional stainless-steel washers or backing plates enhance structural reliability in high-load installations.
Applications
Dry Dock Chambers
D Type Fenders are widely installed along chamber walls where vessels are positioned for construction or maintenance. They prevent structural damage during hull shifting and provide stable protective contact during extended repair periods.
Shipbuilding Outfitting Platforms
During final outfitting stages, vessels are frequently repositioned for equipment installation. Fender systems protect both hull coating and dock infrastructure from unintended impact.
Vessel Maintenance and Retrofit Facilities
In repair yards where ships undergo structural reinforcement or repainting, D Type Fenders safeguard critical hull surfaces, reducing rework costs and enhancing overall efficiency.
Why Choose Hongruntong Marine
Specialized Experience in Shipyard Engineering Environments
Hongruntong Marine understands the operational complexity of shipbuilding and maintenance facilities. Our engineering team evaluates dock dimensions, vessel displacement, maneuvering frequency, and contact zones to recommend optimized fender specifications. This ensures precise compatibility with shipyard workflows and operational constraints.
Advanced Rubber Compounding Technology
Our rubber formulations are developed through controlled vulcanization processes that balance hardness, tensile strength, and elongation properties. Each production batch undergoes strict quality testing, including tensile stress analysis, elongation at break measurement, hardness verification, and accelerated aging simulation. This scientific approach guarantees consistent mechanical performance across large-scale installations.
Precision Manufacturing and Quality Assurance
Dimensional accuracy is essential in dry dock applications. Our production lines maintain tight tolerances to ensure correct alignment and easy installation. Comprehensive inspection procedures confirm uniform density and structural integrity before shipment.
Long Term Technical Support and Project Collaboration
We provide detailed installation drawings, mounting recommendations, and on-site consultation when required. Our after-sales support ensures that replacement sections, technical documentation, and engineering assistance are readily available throughout the product lifecycle.
FAQ
1. Are D Type Fenders suitable for continuous static contact in dry docks?
Yes, they are designed to maintain dimensional stability and elasticity even under prolonged compression conditions.
2. Can the hardness be adjusted for low-speed operations?
Yes, Shore A hardness can be customized to optimize cushioning performance.
3. What mounting hardware is recommended?
Corrosion-resistant anchor bolts and reinforced backing plates are recommended for heavy-duty installations.
4. How often should they be inspected?
Annual inspection is generally sufficient unless subjected to extreme operational stress.
5. Can damaged sections be replaced individually?
Yes, modular installation allows selective replacement without removing the entire system.
