Foam Filled Marine Fenders
What is Floating Foam Filled Marine Fenders?
Foam filled fenders is type marine fenders and floating fenders system for ships mooring/berth. Foam fenders adopt pure polyurea technology combined with foam, plastic to ensure it float on water, widely applied to construction fields and marine industry. Foam filled marine fenders is constructed with closed cell EVA/PE foam core, sprayed pure polyrea polyurethane elastomer PU skin, reinforced with tough middle nylon layers, with a higher buoyancy itself. Foam filled fenders come with low hull pressure and maintenance, performed better for light weight ships.
Foam Filled Fenders
Foam Filled Fenders Construction
Guard netless marine foam filled fenders is in sling type, with customized colorful polyurea elastomer skin outside. They are more lighter than netted cushion foam fenders. Used for STS docking, STQ berthing in the ships and marine industry as a protection warnning foam fendering system.
Marine cushion netted foam fenders are particular for heavy marine and construction field due to its tough constructions. Netted polyurethane skin can protect foam fender bodies from external sharps scratches like steel constructions. It has a higher energy absorption performed in a better solutions among the buoyancy floats.
Foam Fenders-RONSEN MARINE
Pile donut fenders are installed on a pile, floating as tidal changes, up or down. Donut foam fenders are more ideal for large tidal wings area. It is designed to protect corners while vessels are ready to dock or playing as a turning dolphin. Foam donut fenders perform as good as guard foam fenders but different design.
Small standard duty shipboard portable fenders are for quick use of navy ships, boats, marines. Their range from 0.3 m in diameter to 1.5 m etc. Normally, Portable foam fenders are installed by fibre ropes at two sides of ships. Shipboard fenders can be equipped with fibres nets outside also.
Floating foam filled rubber coated fenders is a new foam filled fenders developed by Chinese. It has same appearance, shapes as guard foam filled fenders and cushion netted foam fender. The difference is it’s coated with rubber outer skin. Floating foam rubber fenders are the best proven choice of fendering systems for heavy construction marine field especially in hardest conditions.
Foam Filled Fenders Performance Table
We manufacture foam fenders as per PIANC standard and industry standard. Foam filled fenders can be tested by BV, ABS, SGS, Lioyds and CCS.
Application & Installation of Foam Fenders
Applications: foam filled fenders are widely applied to cruise ships, container vessels, bulk cargo, roro ferries, oil&gas tankers, as well as general cargos, navy berths for ship to ship transfers.
Floating Foam Fenders-RONSEN MARINE
Installations: our foam filled fenders can be deployed either in floating or suspended status. These marine fenders are installed against a quay wall or placed side of ships hung by chains or ropes for ship to ship operations and protection. The solid foam filled fenders are suitable for both small and large tidal changes due to its special construction features.
Foam Filled Fenders Inspection
RONSEN FOAM FILLED FENDERS INSPECTION
Official inspection of foam filled fenders is the best guarantee of foam filled fenders quality. Foam filled fenders can be inspected by third parties from classification socity like CCS, ABS, LR, BV, DNV-GL etc., and appointed testing organizations from TUV etc. The tests can be proceed upon clients requirements either for each piece while bulk order or sample inspect. The inspections include visual appearance, dimensions, quantities etc. Our company is available to proceed this tests and we welcome third parties representatives to come to our factory for the inspection.
FAQ
What is Foam Filled Fenders Construction & working principle?
The polyurethane floating fender is a compression-type fender, with a polyurea material serving as the outer protective layer and closed-cell rubber-plastic foam as the cushioning medium. Its interior features a closed-cell polyethylene foam core, and the fender surface is coated with polyurethane elastomer. The foam fender incorporates a spiral reinforcement layer (ZL201120207212.9), with the exterior made of polyurethane elastomer. Based on external assembly, it is categorized into sleeve-type, sleeveless-type, and rotating ear-type.
R1: “Foam” must be translated as foam. Foam fenders can absorb impact energy through compressive deformation like a sponge [8]. By compressive deformation, they absorb the impact energy of vessels, thereby reducing damage to docks and ships [12]. When compressed by 60%, the reaction force increases significantly from small to large, and the energy absorption capacity is substantial.
What is Foam Fenders Manufacturer Technology?
The core of the solid polyurethane fender is made of EPU and a new type of polymer material with adjustable high elastic modulus. The internal buffer medium is high-density closed cell rubber plastic foaming material, such as polyethylene or EVA foam. Some products use 100% closed cell EVA foam hot lamination technology, which does not use adhesives. To enhance toughness and puncture resistance, some fenders use spiral wound embedded nylon tire cords or spiral reinforcement layers inside.
The external protective layer is formed by spraying polyurethane or polyurea elastomer onto the surface using high-pressure airless spraying equipment. After manufacturing, the fender needs to undergo inspection and pressure testing to ensure compliance with relevant standards.
What is Foam Fenders Certification?
The products of mainstream manufacturers have passed quality certifications from multiple international classification societies, including China Classification Society (CCS), French Classification Society (BV), Det Norske Veritas (DNV), American Bureau of Shipping (ABS), etc.
What is Foam Fender Effect of Temperature?
Polyolefin foams are used in foam filled fenders. When subjected to high temperatures, these foams can lose some of their compression resistance, and therefore lose some energy absorption capacity. Likwise, when these foams are subjected to low temperatures, they become stiffer and gain energy capacity. This effect is temporary in both cases, if not carried to the extreme.
The graph above shows the effect of temperature on the various types of foam used in foam fenders. The energy absorption is shown relative to the foam in a standard fender compressed at a rate of 2 in/min(51 mm/min) at 75 (24 degree), which is assigned a rating of 100. This does not reflect the performance of the fender as a whole, because other factors come into play in determining the energy absorption capacity, such as skin thickness and the confining effect of the skin on the foam.
However, the general trend will be evident. In general, if a fender will be constantly exposed to elevated temperatures, such as in installations in hot climates, a slightly larger fender size than normal may be recommended.
What is Foam Filled Marine Fenders Effect of Compression Speed?
At a given percent compression, foam compressed at a high strain rate will absorb more energy than foam compressed at a low strain rate. Polyolefin foams compressed at high strain rates are stiffer than when compressed at low strain rates, where strain rate is defined as the fraction of the foam thickness compressed in a given time interval. This trend shows up in fender performance, although other factors come into play in determining fender energy absorption, such as skin thickness, temperature, and the confining effect of the skin on the foam.
What is the Advantage of Foam Filled Fenders Comparing With Marine Rubber Fenders?
Compared with DA type, SA type and other traditional rubber fenders, foam filled fenders have significant advantages in energy absorption performance, reaction control, installation convenience, maintenance cost and environmental protection.
Closed cell foam materials such as polyurethane and EVA are used for foam filled fenders, whose energy absorption can reach 1.2-1.5 times of inflatable fenders. When a ship berths, foam fenders can absorb impact energy through compression deformation like sponges, reducing the reaction force on the hull and the wharf.
The reaction coefficient of the traditional DA type rubber fender is usually 60-80Kn/m, while the foam fender can be as low as 40-60kN/m, reducing the reaction by about 30%.
The closed cell structure of foam fender can uniformly disperse the stress and avoid local stress concentration when it is pressed. In contrast, the DA fender is equipped with a fender to reduce the surface pressure, but the overall stress dispersion effect is still weaker than the foam fender.
Guard foam marine fender – Marine cushion foam fender
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