Netted Foam Filled Marine Fenders

Netted foam filled marine fenders are essential safety and protective devices used in the marine industry. These fenders are designed to absorb the impact and energy generated when ships come into contact with docks, piers, or other vessels.
The structure of these fenders consists of a netting outer layer and a foam core. The netting serves multiple purposes. Firstly, it provides structural integrity, holding the foam in place and preventing it from deforming or being displaced during use. Secondly, it offers some level of protection against external elements such as abrasion, sunlight, and minor physical damage. The foam core, on the other hand, is the key component responsible for energy absorption. It is carefully selected for its density, elasticity, and shock - absorbing properties.

A superior external chain and tire net, heavy-duty rubber tubing and chains that are connected at every intersection with a shackle. This is the key element in the Luhang marine fenders un-surpassed strength and resilience.
The fender has a heat laminated 100% closed cell and resilient foam core that is energy absorbing and cannot be ruptured. This fabrication process uses no adhesives, which decomposes after time therefore making the Luhang marine fenders superior in quality, durability and function. This resilient foam-filled construction provides an unsinkable fender body that permits high energy absorption with a relatively low reaction force compared to most other fendering systems.
In order to enhance the performance of foam fenders, the Luhang foam fenders skin is constructed of tough and thick nylon filament reinforced polyurethane skin. The skin also has a nylon tire cord applied in a helix pattern during the coating that embeds the filament into the skin. Special layers are applied to both ends where stresses are highest. This advanced process makes the foam fender skin extremely durable to all weather, forces and marine conditions.
Various optional fitting designs are available for different requirement. The integral swivel end fittings provide secure point of attachment without obstructing, even when the fender is compressed. The fittings and accessories are constructed of top quality steel (HDG).

Cylindrical netted foam filled marine fenders commonly come in a variety of diameters. Smaller fenders, often used for small boats or in less - demanding applications, may have diameters ranging from 100 mm to 300 mm. These are suitable for protecting small yachts, fishing boats, and personal watercraft when docking at small marinas or private docks.
For medium - sized vessels and more general - purpose use in commercial ports, diameters typically range from 300 mm to 800 mm. These fenders can handle the impact forces generated by medium - sized cargo ships, ferries, and coastal vessels.
Larger cylindrical fenders, designed for large ocean - going vessels such as container ships and oil tankers, can have diameters up to 1500 mm or even larger. These massive fenders are essential for absorbing the significant impact energy when these large ships dock at major ports.
Length Variations
The length of cylindrical fenders also varies according to their intended use. Shorter fenders, around 500 mm to 1000 mm in length, are often used for smaller boats where space is limited. They can still provide effective protection while being more compact.
Medium - length fenders, typically 1000 mm to 2500 mm long, are common for medium - sized vessels. They offer a good balance between energy absorption and ease of installation.
Longer fenders, with lengths exceeding 2500 mm, are used for larger ships. These longer fenders can distribute the impact force over a greater area, enhancing the protection of the vessel's hull.

• There is no ISO standard of foam filled fenders presently, we design the test methods according to USACE / NAVFAC / AFCESA demands.
• Fender Cyclic-Compression Test. Compress the fender along its diameter between two parallel flat plate surfaces to a compressed dimension of 40 percent of its original diameter. Repeat the compression and release cyclic loadings for a minimum of 10 full cycles of compression. Permanent deformation, cracking, or tearing of the fender skin, fender core, or end fittings shall constitute failure of this test.
• Fender Sustained-Load Test. Apply a rated compressive load and hold this load for 24 hours. Record load and deflection each hour. Immediately after release of the load, measure rebound of the fender. Continue to record fender rebound for 24 hours. Failure of the fender or foam core to rebound to 90 percent of its original diameter after 24 hours shall constitute failure of this test. If the foam core is not bonded to the skin of the fender, devise and execute a means for measuring rebound of the foam core and for measuring the void between the foam core and the skin. The maximum rate of compression per minute shall be 20 percent of the total reaction force at 60 percent compression. The full compression cycle, not including rebound, shall take a minimum of 5 minutes.
• Fender Pull-Through Test. Devise and perform a test which will measure the resistance of the end fittings and internal chain to pull through the longitudinal axis of the fender. Failure of the chain, end fittings, or skin to resist rated force of pull-through tension shall constitute failure of this test. After loading, evidence of permanent deformation, cracking, or tearing of the fender or end fittings shall also constitute failure of this test.
• Skin Thickness Core Test.

Fairy

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