D Type Marine Rubber Fender

ISO Approved Marine D Type Rubber Fenders

Florescence offers an extensive range of standard rubber fenders, amongst others: Custom Marine D Fender, delta fender, wing fender, M fender and W fender. They absorb impacts and are used to protect amongst others ships, docks, loading docks, trucks and trailers. Also, Florescence supplies custom-made fenders.

Custom-made dock fenders

We can produce your dock fenders customized. This can be done simply based on a drawing or model. In addition, the fender can be produced in the desired radius, so it can easily follow the contour of a bow or stern.

Custom Marine D Fender

D rubber dock fenders are the most commonly used dock bumpers. The D dock fenders has a flat back, which makes it easy to install on various surfaces. This can be done by means of bolts and/or strips in various manners: horizontally, vertically or diagonally. Mounting holes are made through the top and bottom of the fender, or through the sides.

There are three different types of D bumpers available:

With an inner chamber, D-shaped;

With an inner chamber, O-shaped;

D Wing fender

The wing fender is usually mounted on the inside of a profile, which creates a dock bumper that is highly resistant to all kinds of forces. This type of fender has an o-shaped inner chamber (standard), but can also be produced without an inner O shape.

Features of D rubber fender

1.Anti-ozone, anti-aging
2.Good elasticity
3.Convenient installation
4.Shiny appearance
5. Extruded or co-extruded seal;
6. OEM and ODM service supply

Application

DD Rubber Bumper Fenders are used for tugs, barges, work boats, and pilot boats as side belting and protective fenders against
heavy rubbing, brushing and pushing forces. It can be pre-curved, chamfered and drilled to aid installation at a relatively low
cost and can also be cut to the length required.

Core Structural Advantages

1.Flexible Bore Optimization: Available in D-bore and O-bore geometries to allow contractors to perfectly match the harbor's deflection and load-bearing requirements.

2.Flat-Back Seamless Mounting: The wide, flat base fits tightly against concrete quays, steel piles, or vessel hulls, significantly reducing torque stress on mounting bolts.

3.Easy Pre-Curved Customization: Can be pre-curved, cut, or chamfered at our factory to seamlessly wrap around rounded tugboat bows or tight port corners without structural buckling.

4.Internal Flat-Bar Anchoring: Fastened securely using internal steel flat-bars running through the bore, providing massive resistance against tearing and aggressive vertical shear friction.

5.Excellent Marine Compound Resiliency: Formulated from high-content natural rubber, delivering superior tensile strength (>15 MPa), excellent UV resistance, and lifelong ozone endurance.

Our Company

Qingdao Florescence Marine Supply Co., Ltd is a comprehensive marine supply enterprise, integrating the scientific research design, product development with technical services since 1992. We are a specialized manufacturer of pneumatic rubber fenders, foam fenders, a wide range of marine rubber fenders, and ship launch airbags. Our fender products are designed, produced, and validated in full compliance with ISO 17357 and ISO 9001:2000 standards, and each unit is constructed to meet the strict certification requirements of leading ship classification societies such as BV and CCS. With over 30 years experiences, our high quality products sell well worldwide,while delivering the highest levels of customer service and product reliability in the industry. Our highly trained staff are able to travel to your site to undertake repair or refurbishment work on pneumatic or foam filled fenders.

Qingdao Florescence Marine Supply Co., Ltd. is fully committed to promoting our customers development and exceeding our customers expectations in services quality. All the Florescence staff work carefully and treat people honestly. We expect to cooperate with more customers worldwide and create a better future together.

FAQ

Q1: What is the technical difference between a D-Bore and an O-Bore D fender?

A1: A D-bore inner cavity deflects more easily, resulting in a lower initial reaction force. An O-bore cavity is stiffer, providing higher energy absorption but creating a higher reaction force against the hull.

Q2: How is a D type rubber fender fastened to a quay wall or vessel?

A2: It is typically secured by inserting a long steel flat-bar inside the inner bore, which is then tightly fastened directly to the wall or hull using hot-dip galvanized anchor bolts through pre-drilled holes.

Q3: What is the standard design deflection limit for an extruded D fender?

A3: The standard maximum calculation deflection is 50% of its height. Compressing the fender past this threshold can cause permanent rubber flattening and over-stress the anchor bolts.

Q4: Can D fenders be pre-drilled and cut at the factory?

A4: Yes. We provide complete customization, including pre-drilled bolt holes (centered or staggered), custom lengths, and custom chamfered ends to match your exact layout drawings.

Q5: Can D rubber fenders bend around a sharp tugboat bow radius?

A5: For tight radiuses, standard linear extrusion will buckle. We supply specialized pre-curved D fenders molded to your ship's specific bow or stern radius to ensure a seamless flush fit.

Q6: Are your D type dock fenders resistant to crack propagation from ozone?

A6: Yes. Our raw compounding formula contains highly active anti-ozone and anti-aging chemical agents, preventing surface cracking under prolonged, harsh seaside tropical sunlight.

Q7: What anchor bolt materials are recommended for saltwater installations?

A7: We highly recommend using Hot-Dip Galvanized (HDG) steel (Grade 8.8) or premium marine-grade Stainless Steel (SS316) anchors to prevent rusting in aggressive marine splash zones.

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