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EVA/Polyurea Mooring Buoys VS Traditional Steel Mooring Buoys

EVA/Polyurea Mooring Buoys VS Traditional Steel Mooring Buoys
Update Time:2019-08-07

Foam Mooring Buoys VS Traditional Steel Mooring Buoys

Lets ake a look at our info-graphic to find out why EVA foam is so fantastic and how changing to foam mooring buoys can save you time and money.

 

Around the world, metal buoys are being replaced by cheaper and more durable plastic navigation buoys.  Steel buoys are very heavy and labour intensive and you need to bring them in every five years or so for repainting and refurbishing. 


Foam buoys can be cleaned and maintained at sea, and because they’re UV stable, they never need repainting.

Foam buoys have many advantages over steel, they don’t rust, are easy to transport and last much longer than their steel counterparts. And because new foam technology is much lighter, you can use lighter, cheaper moorings and less chain wear.


Not only that, but our foam buoys will remain afloat even when hit by a vessel because each buoy is filled with marine grade closed cell foam core.


The benefits of foam buoys make them the obvious choice for the future. Foam buoy is really fantastic.

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Considerations

EVA / Polyurea Mooring Buoys

Traditional Steel Mooring Buoys

1

Rusty and Worn Out

EVA / Polyurea Mooring Buoy will never get rusty and worn out. The top and bottom Mooring Rings and its Middle Structure are all-in-ones made by stainless steel or HDG Q235 steel, no painting is required, the chance of getting rusty and worn out is much less than normal steel.

A Steel Mooring Buoy and its top and bottom Mooring Rings that made in mild steel will require continuous maintenance including removal, repairing, anti-rust / anti-fouling painting and replacement almost every two years.

2

Pulling Forces

Bearing of all pulling forces directly by the Middle Shaft. The Mooring Buoy itself only acts as a floatation unit to support the weight of the Mooring Chain and maintain 33 – 50 % stays afloat on the surface as required.

Bearing of pulling forces among the cylindrical steel structure of the Mooring Buoy. In case of ageing or lack of maintenance, it may be creaked, holed, sunk or pulled apart during a heavy storm.

3

Anti Collision

The cylindrical body of an EVA / Polyurea Mooring Buoy is soft, light-weight and high abrasive material, in case of collision, the impact forces will be much reduced and made no damage to the Boat.

Damages to the Steel Mooring Buoy and the Boat even in a minor collision.

4

Weight

An EVA / Polyurea Mooring Buoy of 1.0 meter in Diameter only weighs about 120 Kg. The Mooring Buoy’s material is light-weight (buoyant), long-lasting and maintenance-free.

A Steel Mooring Buoy of 1.0 meter in Diameter weights about 550 Kg. The Mooring Buoy’s material is heavy steel, in case of ageing/damages (cracked and holed) it will sink, unless it had been filled with Styrofoam inside, but it will require additional costs and procedures.

5

Buoyancy

The weight of a Mooring Chain 25 mm x 12 meters long is about 170 Kg (downward force). In order to maintain 33 – 50 % of the Mooring Buoy stays afloat on the surface as required, an EVA / Polyurea Mooring Buoy of 0.8 meter in Diameter only needs 0.8 meter in Height to offset the downward forces and maintain about 0.4 meter stays afloat on the surface.

In order to maintain 33 – 50 % of the Mooring Buoy stays afloat on the surface as required, a Steel Mooring Buoy of 1.0 meter in Diameter needs about 1.2 meters in Height to offset the downward forces and maintain about 0.6 meter stays afloat on the surface.

Higher the Mooring Buoy afloat on the surface, higher the chance of titling sideway that causes the growth of marine barnacles and worn out on the top half of the Mooring Buoy.

6

Maintenance

An EVA / Polyurea Mooring Buoy will never get rusty, worn out and it is very light-weight, over a period of time, when marine barnacles found on the surface and underneath of the Mooring Buoy, it can be easily flipped over 90 degrees on the surface and cleaned in place Without removal and repainting. EVA / Polyurea Mooring Buoy is long-lasting and maintenance-free, it may last for 10 years or more under normal usage without extensive care.

Over a period of time, when rusty and marine barnacles found on the surface and underneath of a Steel Mooring Buoy, additional costs will be required for removal, cleaning, repairing, repainting and replacement. Even under reasonable good maintenance, a Steel Mooring Buoy may only last for about 5 years.

Call Jerryborg Marine on 0086-13881986406 to find out in more detail the advantages of changing to EVA foam buoys.