Cylindrical Fender

Cylindrical Fender is commonly used for all applications, bulk cargo berths, fishing and workboat berths, general cargo quays, pontoons and floating structures, roro and ferry terminals, tugboats and havens, etc. It is well capable of absorbing forces and loads and easy to install and maintain.

Core Highlights:

Classic & Economic Protection: The most time-tested, cost-effective, and versatile marine fender system globally.

Low Reaction Force: Gradual increase in reaction force combined with steady energy absorption protects both the vessel hull and quay wall.

Bi-directional Versatility: Equal performance in both longitudinal and transverse directions, highly adaptable to various ship sizes.

Flexible Installation: Easily mounted horizontally, vertically, or diagonally using chains, bars, or brackets.

Cylindrical Fender has the features as follows: 

1.Low reaction force and surface pressure, reasonable rated energy absorption; 

2.Strong adaptability transverse and vertical shake when the ship berths; 

3.Easy to deploy. Size : OD0.15 m x ID0.075m ~ OD2.0 x ID1.0m. 

Cylindrical Fender Features:

Economical solution to protect most berthing structures;

Less surface pressure, reasonable energy absorption;

Less reaction force at lower deflection;

Thick wall resists abrasion and wear;

Linear load-deflection curve;

Easy to install and maintain.

Cylindrical Fender Specification:

Cylindrical Fender Characteristic：

Cylindrical Fender has low reaction forces, little surface pressure and reasonable energy absorption.

Cylindrical fender is especially applicable for upper part of integral docks and heavy style docks.

Cylindrical fender is applicable for ships with different size.

Various installations styles such as horizontal, vertical and diagonal etc.

Accessories: Steel Bar, Chain, Shackle and U-Ring.

Cylindrical Fender Description:

Excellent resistance to sunlight and UV radiation

Excellent resistance to alkalis and acids, chemicals, steam and seawater.

Good resistance to high and low temperature, -60℉ to +150℉

Minimum tensile strength is 2000PSI

Compression resilience is 90% to 95%

Excellent resistance to impact

Negligible water absorption

Product Overview & Installation Methods

Cylindrical fenders feature a hollow circular cross-section, offering excellent resilience and durability. They are primarily deployed on quay walls, general cargo berths, tugboats, and bow/stern protection. Depending on the size and structure, three primary fixing methods are applied:

Chain Suspension (for large diameters): Supported by a central steel bar and suspended by chains to allow the fender to float and roll with the vessel's movement.

U-Anchors & Brackets (for medium diameters): Fixed tightly against the quay wall using heavy-duty brackets on both ends.

Longitudinal Bars (for small diameters): Mounted onto the hull or dock using an internal flat bar, common for tugboats and workboats.

Cylindrical Fender FAQ :

Q1: How do I choose the right ratio between the Outer Diameter (OD) and Inner Diameter (ID)?

A1: The standard ratio is typically ID= 0.5×OD. A thicker wall( smaller ID) increases the stiffness and reaction force, providing higher energy absorption for heavier vessels, while a thinner wall offers a softer cushioning effect.

Q2: Why are Cylindrical Fenders still preferred over newer designs like Cone or Cell Fenders for general cargo berths?

A2: While Cone and Cell fenders offer higher energy-to-reaction ratios, Cylindrical fenders excel in versatility and cost-efficiency. They can easily accommodate vessels of vastly different sizes and are much easier to install and maintain, making them highly economical for multi-purpose docks.

Q3: Can Cylindrical Fenders be installed on a curved quay or a tugboat bow?

A3: Yes. Small to medium-sized cylindrical fenders can be pre-curved or naturally bent to fit the profile of a tug's bow or a curved dolphin. For sharp radii, we recommend factory-pre-curved sections to avoid excessive internal stress.

Q4: What is the expected service life of your Cylindrical Fenders?

A4: With proper installation and routine inspection, our fenders have a service life of 10 to 15 years in harsh marine environments, thanks to our advanced anti-ozone and anti-UV compounding.

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