The BV Certificated Gray D-Type Rubber Fender DD350 is a top-tier marine protection product engineered to safeguard vessels, docks, and marine structures from collision damage. As a flagship model in the DD-series (double-D center bore) of extruded rubber fenders, it combines a compact, robust design with exceptional impact absorption—making it a preferred choice for frame docks, tugs, workboats, and small craft operations. Manufactured by China Marine Rubber (Qingdao) Industrial Co., Ltd., a specialist in rubber fender systems, this product adheres to international marine standards and delivers reliable performance in harsh saltwater, freshwater, and industrial marine environments. Whether for inland waterways, marinas, or commercial ports, the DD350 D-Type Rubber Fender balances functionality, durability, and ease of use to meet the diverse needs of marine protection projects.
Specification | Details (Unit: mm/kg/m) |
Model | DD350 |
A (Core Dimension) | 350 |
B (Core Dimension) | 350 |
C (Thickness) | 175 |
D (Center Bore) | 175 |
h (Height) | 87.5 |
øE (Outer Hole Diameter) | 80 |
øF (Inner Hole Diameter) | 38 |
G (Mounting Range) | 100-250 |
H (Installation Span) | 300-600 |
Flat Bar | 130x16 |
Bolt Size | M33 |
Weight | 107 |
Note: The DD-series also includes models like DD100, DD200, and DD500, while the DC-series (cylindrical center bore) offers additional options for different load requirements.
Align the DD350 fender with the mounting surface (dock edge, vessel hull, or pontoon).
Secure the fender using the provided 130x16 mm flat bar and M33 bolts, ensuring a tight fit within the 100-250 mm mounting range.
Verify that the installation span (300-600 mm) matches the project’s structural requirements to optimize impact absorption.
Clean the fender surface quarterly to remove marine growth, debris, or chemical residues.
Inspect bolts annually for tightness and replace any corroded hardware promptly.
Avoid contact with sharp objects or abrasive materials that may damage the rubber surface.
For custom pre-curved fenders, check for structural deformation annually and contact the manufacturer for repairs if needed.
Beyond BV Certification, the DD350 D-Type Rubber Fender complies with ISO marine rubber standards, ensuring consistency in material quality and performance. China Marine Rubber maintains strict quality control throughout the production process—from raw material selection to extrusion and finishing—guaranteeing that every unit meets or exceeds customer expectations. The product also comes with a 12-month warranty against manufacturing defects, providing additional peace of mind for buyers.
Standard colors are black and gray (Navy). Custom colors are available upon request with a minimum order quantity.
Yes. The high-grade synthetic rubber material is resistant to saltwater corrosion, UV radiation, and marine chemicals, making it ideal for coastal ports and saltwater applications.
Absolutely. Pre-curved designs are available for custom orders—simply provide your dock’s curvature radius, and our team will engineer a fender that fits perfectly.
More Details about D Fender
At the core of the DD350’s credibility is its BV Certificated status, awarded by Bureau Veritas—one of the world’s leading marine certification bodies. This certification validates that the fender meets strict international standards for material quality, impact resistance, and structural integrity, giving buyers confidence in its reliability for critical marine applications. Every unit undergoes rigorous pre-delivery inspections to ensure consistency and performance.
Designed with practicality in mind, the DD350 D-Type Rubber Fender features a smaller bottom width that simplifies mounting on frame docks, vessel hulls, and pontoons. It comes with pre-specified flat bar (130x16 mm) and bolt size (M33) for seamless installation, requiring no complex tools or specialized labor. Routine maintenance is equally straightforward—regular cleaning to remove marine debris and annual bolt checks ensure long-term performance, reducing operational downtime and costs.
Crafted from high-grade synthetic rubber, the DD350 resists corrosion, aging, UV radiation, and chemical exposure—critical for withstanding the harsh conditions of marine environments. Its dense rubber texture and D-shaped outer form enhance impact absorption, effectively dispersing collision forces to minimize damage to vessels and structures. The standard gray (Navy) color is not only aesthetically suited for marine settings but also resistant to fading, maintaining the fender’s appearance over years of use.
While the DD350 follows standard specifications (350x350 mm core dimensions, 107 kg/m weight), it offers extensive customization to fit unique project requirements. Options include pre-curved designs for curved docks or vessel hulls, special sizes beyond standard ranges, and custom colors (available upon request) to match branding or environmental needs. This flexibility makes the D-Type Rubber Fender DD350 adaptable to a wide range of marine protection scenarios.
The compact design and robust impact resistance of the DD350 make it ideal for frame docks and wharves, where space is often limited and frequent vessel berthing requires reliable protection. It safeguards dock edges from scratches, dents, and structural damage caused by tugs, workboats, and small commercial vessels.
Tugs and workboats operate in dynamic, high-collision environments—whether assisting larger ships or navigating narrow inland waterways. The BV Certificated DD350 provides essential hull protection, absorbing impacts during maneuvering, towing, and berthing without adding excessive weight or bulk to the vessel.
Marinas and pontoons cater to recreational boats, yachts, and small craft, where gentle yet effective protection is key. The DD350’s balanced impact absorption prevents damage to delicate hulls while maintaining stability for berthing vessels. Its customizable colors also allow marinas to align the fenders with their aesthetic guidelines.
Inland waterways—such as rivers, canals, and lakes—present unique challenges, including shallow waters and frequent vessel traffic. The DD350’s durable material resists silting and freshwater corrosion, while its easy installation makes it suitable for temporary or permanent marine protection in these settings.