What is Pneumatic Fenders and Why Do We Use Them?

Pneumatic Fenders are the ideal choice for inter ship dealings and port accessories. It&#;s made of the strong rubber sheet with synthetic-cords. The compressed air inside can keep pneumatic fender to float on water. It&#;s also as a shock absorber when ship to ship or ship to dock operations. Their deployment is quick and robust. At the time of docking, the pneumatic fenders minimize the risk of damage and safeguard both people and cargo.

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Types of Pneumatic Fenders&#;

There are four common types of pneumatic fenders applied in ships including chain-tire net (CTN) pneumatic fenders; Sling type fenders; low-pressure pneumatic fenders; hydro-pneumatic fenders.

1.CTN pneumatic fender has a network of tires connected with chains in horizontal as well as vertical direction to protect the fender body. As the chains remain in the water all the time so must be made up of corrosion-resistant galvanized materials. These are the simplest and cheaper types of marine fenders which increase the clearance between the structure and the hull to a larger extent.

2.Sling type pneumatic fenders: These are similar to chain type fenders with the only difference that fenders can be slung with even ropes made up of meshed wire strands than chains.

3.Low-pressure pneumatic fenders: These are the type of pneumatic fenders that deliver minimum pressure to the hull by absorbing kinetic energy to a maximum extent by providing maximum contact surface. It has these performances: lightweight, portable fender, low developed pressure upon the hull structure of vessels and easily inflated and deflated.

4.Hydro-pneumatic Fenders: These are the pneumatic fenders that are made in compliance with the need for fender. It has later performance: variable draft, very low hull pressures, prevents acoustic tile damage.

Advantages of Pneumatic Fenders:

1.Advantages during inclined berthing

During berthing, the initial contact with the dock is usually inclined, which puts a lot of pressure on both surfaces (the dock and the ship).

For a typical solid rubber fender, the energy absorption will be greatly reduced in the case of inclined compression. Therefore, it is not uncommon to see solid fenders used are larger in sizes. On the other hand, despite the inclined compression, the energy absorption of the pneumatic fender remains at a high level. Since the load pressure is more evenly distributed, the torque performance against the dock is usually smaller compared to the traditionally designed solid fender system.

2.Advantages during crucial weather conditions

In critical weather conditions, the wave action is serious, and the mooring process becomes more complicated due to the imbalance between the upper and lower terminals. This imposes a high shear force on the fender, and frequent changes in force during mooring in such weather conditions will cause fatigue on a typical solid fender. However, on the other hand, the flexible contact area and larger allowable deflection characteristics of the aero fender can minimize fatigue in this case. In fact, for severe seas or frequent severe weather conditions, pneumatic fenders may be better than solid fenders because of their longer service life.

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3. Deterioration in performance minimized

Aging and fatigue often lead to degraded fender performance. However, due to its air-filled body and highly elastic materials, such problems are minimized. Solid rubber fenders or foam fenders depend more on the hardness of the material, and this dependence may lead to a decline in energy absorption performance after years of use and temperature changes. On the other hand, as long as basic maintenance and air pressure control are maintained, the pneumatic fender can maintain its best performance even at extremely low temperatures as low as -50 degrees Celsius or during periods of high fluctuations.

The pneumatic fender is a kind of buffer, also called Yokohama fender, because it was invented in by a rubber product company in Yokohama, Japan. The interior is filled with high-pressure air. It can be easily deflated, so that it can be easily relocated and re-commissioned. The pneumatic fender is used to absorb the kinetic energy of the ship docking, dock wall or ship docking. Fenders can be applied to all types of ships from cargo ships to cruise ships, ferries and private yachts, and can prevent damage to ships and berthing structures.

Pneumatic fender sizes

The size of the inflatable pneumatic fender has a set of standard sizes, which is specified in the industry production standard ISO. Determine the size of the pneumatic fender according to the existing common ship size. pneumatic fenders have 12 standard diameter sizes and 13 standard length sizes. They form 17 standard pneumatic rubber fender standard sizes through different combinations. The diameter range of the pneumatic fender is 0.5m~4.5m, and the length range is 1m~12m. Commonly used sizes in ship-to-ship operations are 3.3mx6.5m and 2mx3.5m.

Nowadays, many end users have special size requirements, and most manufacturers can customize non-standard size pneumatic fenders according to customer requirements to meet the special needs of users.

As a manufacturer and supplier, we understand the buyer&#;s desire to buy high-quality products at a low price. However, in a rational analysis, cheap products must cut production costs, and product quality cannot be guaranteed. Sunhelm purchases pure natural rubber sheet materials with very few impurities. We don&#;t want customers to receive products that are too poor in quality and lead to low safety, so that the whole process is unpleasant to use&#;So even if the price of other manufacturers in China No matter how low it is, we will not compete with them for low prices. Sunhelm always believes that you get what you pay for, resists unhealthy low-price competition, and hopes to bring true high-quality, cost-effective pneumatic fender products to compatriots in the maritime industry all over the world.

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