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SUPPLY AND INSTALLATION OF PRIVATE BOAT MOORING SYSTEMS

DESIGN, SUPPLY AND INSTALLATION OF BOAT MOORING SYSTEMS

The weaknesses of the traditional Steel Mooring Buoys are rusty, worn out and bearing of all pulling forces among the cylindrical structure of the Mooring Buoy. In case of aging and/or collision, the Steel Mooring Buoys will be creaked, holed, sunk or even pulled apart during a heavy storm.

Non-metal Mooring Buoys are available in two versions: Middle Shaft Version (Middle Shaft with top and bottom Mooring Rings) and Through Chain Version (The Mooring Buoy with Hollow Structure that allows the Chain to go through). The idea of the Non-metal Mooring Buoys is to remove the stress (pulling forces) from the cylindrical body of the Mooring Buoy, thus, all the pulling forces will be directly taken over by the middle shaft or mooring chain and the mooring lines to the Boat, the Mooring Buoy itself only acts as a floatation unit to support the weight of the mooring chain and maintain about 50 % stays afloat on the surface as required.

With the high technology support and availability of new material nowadays, the new designed Non-metal Mooring Buoys are either made with high density Ethylene-co-Vinyl Acetate (EVA) inside and sprayed with several coats of Polyurea outside, or Fiberglass Module (GRP) with Reinforced Rubber Fender and filled with hard Polyurethane (PU) inside. Despite the weight and size of a Non-metal Mooring Buoy is much less than a Steel Mooring Buoy under the same requirement, a Non-metal Mooring Buoy is more long lasting (about 10 years under normal usage) and maintenance free for long term operation. It really overcomes most of the previous problems on the Steel Mooring Buoys and significantly reduces the on-going maintenance costs. Color Choice of Yellow / Green / Red is also available upon request.

There are many choices of HDPE or EVA/Polyurea Buoys available in the market nowadays, it is true that the cylindrical body of a EVA/Polyurea Mooring Buoys will never get rusty and worn out, however, the Mooring Rings and the Middle Shaft that are made in galvanized mild steel may pull apart from the cylindrical body when they become rusty/worn out, and will only last for a few years even under continuous maintenance. This is the reason why we designed and made all our Non-metal Mooring Buoys with Stainless Steel Middle Structures and be covered by Polyurea spraying for maintenance free and long lasting.

Mooring Chain connects the Mooring Buoy to the Concrete Sinker underwater, but most of the Boat Owners did not get what they paid for ! The material used for the Mooring Chains makes a world difference in its pulling strength and durability although they look the same.
Mooring Chains (Stud Link, AM or Open Link, PM) are made by Forged Steel and are classified into Three Categories (Grade I, II and III), Grade I Chains are slightly cheaper, but it corrodes much quicker in seawater condition and the pulling strength is 40 % less than the Grade II Chains. Grade II Chains with hot dip galvanized finishing (Stud or Open Link) are the best choice for Boat Mooring Systems in seawater condition.

KKCL established Production Lines in mainland China (PRC) and is a Professional Supplier for Mooring Components, such as Mooring Buoys, Mooring Chains, Swivels, Shackles and Concrete Sinkers etc., KKCL is more than capable to design, supply and install the full set of Mooring System to meet your Boat requirement. Sample of the Non-metal Mooring Buoy is available at our Warehouse at Fo Tan, Shatin, Hong Kong for your inspection and hand-on experience upon request.

Boat Mooring Requirements in Hong Kong

The size of a Mooring System is dependent upon the total length of the Boat, the Mooring Chains and Concrete Sinkers to be used will normally be listed in the Permission from the HK Marine Department. The size and the type of Mooring Buoy will not be specified, however, the requirement is the Mooring Buoys should have sufficient buoyancy to support the weight of the Chain at fullest stretch and should be 50 % greater than the combined weight of the suspended components (i.e. 33 - 50 % of the Buoy stay afloat on the surface after it has been chained up). Please take note that higher the Mooring Buoy afloat on the surface, higher the chance of titling sideway that cause the growth of marine barnacles and worn out on the top half of the Mooring Buoy.

Generally, a Boat of total length between 5 - 8 meters, will use Chain size 12 - 18 mm, a Mooring Buoy of 0.6 meter in Diameter will be used; a Boat of total length between 9 - 11 meters will use Chain size 25 - 32 mm, a Mooring Buoy of 0.7 - 0.8 meter in Diameter will be required. A Boat of total length between 11 - 26 meters will use Chain size 32 - 40 mm, a Mooring Buoy of 1.0 meter in Diameter will be required;

a Boat of total length between 24 - 41 meters will use Chain size 40 - 45 mm, a Mooring Buoy of 1.1 - 1.2 meters in Diameter will be required. A Boat of total length 42 - 56 meters will use Chain size 50 mm, a Mooring Buoy of 1.3 meters in Diameter will be required. The entire cylindrical body of a Non-metal Mooring Buoy is very light-weight (buoyant), never get rusty and worn out, no painting is required, it may last for 10 years or more under normal usage without extensive care.

With our fully equipped Production Lines in mainland China (PRC), the cost of making a Non-metal Mooring Buoy with Stainless Steel Middle Structures is very compatible to those Steel Mooring Buoys that needed to be filled with Styrofoam inside and fully molded with Fiberglass outside, but the durability and maintenance free is much better.

Non-metal Mooring Buoys Vs Traditional Steel Mooring Buoys

Item

Considerations

Non-metal Mooring Buoys

Traditional Steel Mooring Buoys

1.

Rusty and Worn Out

A Non-Metal Mooring Buoy either made with EVA sprayed with Polyurea or Fiberglass Module (GRP) filled with hard Polyurethane (PU) inside, will never get rusty and worn out, the top and bottom Mooring Rings and/or its Middle Structure are made with Stainless 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 will require continuous maintenance including removal, repairing, anti-rust / anti-fouling painting and replacement.

2.

Pulling Forces

Bearing of all pulling forces directly by the middle shaft or mooring chain and the mooring lines to the Boat. The Mooring Buoy itself only acts as a floatation unit to support the weight of the mooring chain and maintain about 50 % stays afloat on the surface as required.

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

3.

Collision

The cylindrical body of a Non-metal Mooring Buoy that is made with EVA / Polyurea is a 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 Mooring Buoy and the Boat even in minor collision.

4.

Weight

A Non-metal Mooring Buoy of 1.0 meter in Diameter only weights 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 aging/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 about 50 % of the Mooring Buoy stays afloat on the surface as required, a Non-metal 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 about 50 % of the Mooring Buoy stays afloat on the surface, a Steel Mooring Buoy of 1.0 meter in Diameter needs about 1.2 meter 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 and Durability

A Non-Metal 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 a Non-metal Mooring Buoy, it can be easily flipped over 90 degree on the surface and cleaned in place without removal and repainting. A Non-Metal 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.

Manufacturing of the Non-metal Mooring Buoys / Navigation Buoys

All Non-metal Mooring Buoys and Navigation Buoys are tailor-made at our Factories in mainland China (PRC) based on individual needs and requirements of Hong Kong Marine Department. The manufacturing processes of the EVA / Polyurea Middle Shaft Mooring Buoys / Wreck Buoys (Marine Department) and Fiberglass (GPR) Through Chain Mooring Buoys are:

Firstly, assembly of the Pre-cast EVA with Stainless Steel Middle Shaft or Fiberglass Module with Stainless Steel Hollow Structures to form the size of the required Mooring / Navigation Buoy.

Secondly, spray the EVA cylindrical body with several coats of Polyurea that mixed with desired Color by Computerized Spraying System. Polyurea is a new developed material that is very high abrasive, heat resistant and never worn out, it will dry immediately upon spraying.
For Fiberglass Through Chain Buoys, installation of Reinforced Rubber Fenders and filled inside up with hard Polyurethane (PU), and each Buoy paired with a Stainless Steel Mooring Ring.

Finally, dress up, marking of Buoy Numbers, Anti-fouling painting and pack up for delivery.

For inquiry, please contact Mr. Li on
Tel.: (852) 6952 8400, 9488 4148 or (86) 138 2522 3300 or E-mail kkli@kkcl.com.hk

健傑國際有限公司首頁
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倉庫和工場
Warehouse
/Workshop

九龍新界沙田火炭坳背灣街 14 - 24 號,
金豪工業大廈第一期
9 N
Flat N, 9/F, Block 1, Kin Ho Industrial Building,

14 - 24 Au Pui Wan Street, Fo Tan, Shatin, N.T., Hong Kong

通訊地址
Mailing Address

九龍新界沙田水泉澳邨,崇泉樓 2313
Room 2313, Sung Chuen House, Shui Chuen O Estate,
Shatin, N.T., Hong Kong

Tel.: (852) 6952 8400 or (852) 9488 4148 or (86) 138 2522 3300
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 Inquiry: E-mail: kkli@kkcl.com.hk , WhatsApp: 69528400 , WeChat: 13825223300

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