Mooring Systems

Mooring System

The weaknesses of the traditional Steel Mooring/Navigation Buoys are rusty, worn out, and sharing of pulling forces among the Buoys’ cylindrical structures.  In the case of ageing or collision, especially the Private Mooring Buoys, it may be creaked, holed, sunk, or even pulled apart during a heavy storm.

EVA-Polyurea Mooring Buoys

With the availability of new materials and high technology supports nowadays, we develop the Non-metal Mooring Buoys that are either made in high-density Ethylene-co-Vinyl Acetate (EVA) with stainless steel Middle Shaft and thoroughly sprayed with Polyurea or used the Fiberglass (GRP) Through Chain Module filled with rigid Polyurethane (PU) and fitted with the Reinforced Rubber Fender.
Polyurea is a newly developed material applied by spraying with a Computerized Spraying System.  It is a very high abrasive, heat resistant, maintenance-free and long-lasting fabric; it can be mixed with the desired colour and dry immediately upon spraying.
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 sustained by the Middle Shaft or the Mooring Chain directly, the Mooring Buoy itself only acts as a floatation unit to support the weight of the Mooring Chain and maintains 1/31/2 stay afloat on the surface as required.
Despite the weight and size of an EVA Mooring Buoy being much less than a Steel Mooring Buoy under the same buoyancy requirement, it is more long-lasting (10 years or more) and maintenance-free for long-term operation.  In the case of collision, the soft, lightweight and high abrasive EVA material will significantly reduce the impact forces and cause no damage to the Boat and the Buoy.  Over a period of time, when marine barnacles are found on the surface and underneath an EVA Mooring Buoy, it (only weighs 1/4 of a Steel Buoy) can be easily flipped over 90 degrees on the surface and cleaned in place without removal and repainting.  EVA-Polyurea Mooring Buoys overcame most of the previous problems on Steel Mooring Buoys and waived the ongoing maintenance costs.
There are many Steel-Fibreglass Through Chain Buoys and HDPE Buoys available nowadays.  The cylindrical body of a Steel-Fibreglass or HDPE Mooring Buoy will indeed last better in seawater than a Steel Mooring Buoy; however, its hollow structure or middle shaft made in mild steel may pull apart from the cylindrical body due to rusty and worn out after a couple of years.  Eventually, the heavy rust and marine barnacles generated inside the hollow structure will seize the Chain inside the Through Chain Buoy.  Besides the problems of the hollow structure and middle shaft, some HDPE Buoys are too narrow and too high; please note that the higher the Mooring Buoy afloat on the surface, the higher the chance of leaning sideways causes the growth of marine barnacles on the top half of the Mooring Buoy.
That is why we only tailor-made all EVA-Polyurea Mooring Buoys based on the Customer’s Boat and Chain requirements.  EVA Buoys made by us are available in two versions: Middle Shaft Version consists of a middle shaft with top and bottom mooring rings are all-in-ones made of stainless steel which fully wrapped around by EVA, then entirely sprayed with Polyurea for watertight, maintenance-free and long-lasting; or the Through Chain Version consists of a stainless steel hollow structure that allows the Chain to go through.  The colour choice of Yellow, Green and Red is available upon request.

Mooring Chains, Swivel and Shackles

A Mooring Chain connects the Mooring Buoy to the Concrete Sinker underwater, but most Boat Owners did not get what they paid for!  The material composition of the Chain makes a world difference in its pulling strength and durability, although they all 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 cheaper but erode much quicker in seawater conditions, and the pulling strength is 40 % less than the Grade II Chains.  Grade II Chains are commonly used for Private Boat Mooring, while Grade III Chains are mainly used for Oceangoing Vessels.
The water depth primarily decides the Length of a Mooring Chain at the mooring area.  Once the Chain Length is identified, a Mooring Chain (No matter Grade II or Grade III, Stud-Link or Open-Link) should be tailor-made at the Chain Factory by fitting an Enlarged End-link at both ends of the Chain, especially the Stud-link Chain, for connecting with the standard Type-D Anchor Shackle (It is usually 40 % bigger than a normal Chain-link), and preferable fitting a set of standard Swivel (being installed at about one meter below the Mooring Buoy).  The whole length of the Mooring Chain with all required fittings will then be load-tested to standard and coated with Black Asphalt Paint for delivery.  Hot-dipped galvanised finishing that better reduces marine barnacles in seawater conditions can be done at additional costs.
Boat Owners should not accept Chains that are cut from the Contractor’s existing local stock, as such Chains have no Enlarged End-links at both ends, no standard Swivel fitted, and no load-testing has been done.  These Chains, especially the Stud-link Chains, may only be connected with the undersized or inadequate Shackles.

Concrete Sinkers

Unlike nowadays, most Concrete Sinkers laid before were undersized (did not meet the required weight) due to the lack of prior inspection by the Authority.  A Concrete Sinker that meets the necessary weight (the cubic volume) for assessment seems a simple matter for most Contractors nowadays.  However, the Lifting Eye Ring is always and still undersized!
First of all, if the Lifting Eye Ring is too small (Ring diameter and radius), the standard Type-D Anchor Shackle (40 % bigger than a normal Chain-link) can’t go through; thus, a non-standard or undersized Shackle has to be used.
Secondly, after these undersized Lifting Eye Ring and Shackle submerge underwater for a couple of years, would they still be able to sustain the Mooring Chain’s pulling forces during a heavy storm?  Would they pull apart underwater during the subsequent lift for Chain renewal?  If it does happen, the Boat Owner has to pay for a new Sinker and reinstallation again

Mooring Lines

Finally, no matter how good a Mooring System has been made and installed, improperly secured or misusing an undersized Swivel on the Mooring Lines may cause the Boat to be lost during a heavy storm.  About ten Boats were lost after the Super Typhoon [Mangkhut] because of the failure of the stainless steel swivel on the Mooring Lines. 

Liability of the Mooring System 

Boat Owners or Yacht Clubs are not always aware of all the requirements of a Mooring System.  Even some Contractors do not fully understand all the standards and requirements or choose to ignore them if the fulfilment cost is comparatively higher.
Nevertheless, the Boat Owners are ultimately responsible for the quality and compliance of the entire Mooring System.  In case of any failure during a heavy storm, when you proceed with the damage claims (your Boat and the implicated parties) against the Boat Insurance Company, they will then employ an expert to inspect and verify the entire Mooring System for non-compliance.  Selecting a Professional Contractor for the job in the first place is highly recommended.

Our Quality Products and Services

Kinetic Key Company Limited (KKCL) has been a Professional Contractor in Marine Works in Hong Kong and China (PRC) for more than 40 years.  KKCL established Production Lines in mainland China to tailor-made the EVA-Polyurea Mooring Buoys and Marine Solar-lighted Warning Buoys (Class 1 & Class 2) upon Customer’s Boat or Project requirements, including supplying all required Mooring Components such as Mooring Chains with standard Swivel, Type-D Anchor Shackles and Concrete Sinkers etc.  All Products fully meet the Hong Kong Marine Department’s requirements.
If you are interested in purchasing an EVA Mooring Buoy, a 
sample is available at our warehouse in the New Territories for your inspection and hands-on experience upon request.
BD_1
BD_2
Chain_Baddly Worn
Chain_wear and tear
Rusty and Holed Steel Buoy
Worn Eye Ring
Worn Mooring Eye
TC Buoy_Chain Shackle
GRP TC Buoy_1
TCD_Buoy Condition_3
Steel TC Buoy_5.1
Damaged TC Buoy_2
D_Buoy
Buoys leaning sideways
Leaning Sideways
MB_Installation_I
MB_4
Precast_EVA_Assembly_3
Polyurea Spraying_1
EVA-Polyurea Buoys_6
MS_EVA-Polyurea_Buoys_P_2
MS_EVA-Polyurea_Buoys_P_1
Buoys in water
Chain
Open Link Galvanized Chain_2
Stud-Link Chain_4
Chain with Swivel_2
Swivel_8
JS_1
Anchor Shackle Locking_4
末端卸扣和加大環及轉環
末端卸扣和轉環
Sinker Eye_12 Tons_1
Chain Connection with Enlarged-End Link_Type-D Anchor Shackle
Lifting Eye and Shackle_1
asdhi8
3 Tons Sinker SS Eye
Sinker

Mooring System

The weaknesses of the traditional Steel Mooring/Navigation Buoys are rusty, worn out, and sharing of pulling forces among the Buoys’ cylindrical structures.  In the case of ageing or collision, especially the Private Mooring Buoys, it may be creaked, holed, sunk, or even pulled apart during a heavy storm.

EVA-Polyurea Mooring Buoys

With the availability of new materials and high technology supports nowadays, we develop the Non-metal Mooring Buoys that are either made by high-density Ethylene-co-Vinyl Acetate (EVA) with stainless steel Middle Shaft and thoroughly sprayed with Polyurea or used the Fiberglass (GRP) Through Chain Module filled with rigid Polyurethane (PU) and fitted with the Reinforced Rubber Fender.
Polyurea is a newly developed material applied by spraying with a Computerized Spraying System.  It is a very high abrasive, heat resistant, maintenance-free and long-lasting fabric; it can be mixed with the desired colour and dry immediately upon spraying.
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 sustained by the Middle Shaft or the Mooring Chain directly, the Mooring Buoy itself only acts as a floatation unit to support the weight of the Mooring Chain and maintains 1/31/2 stay afloat on the surface as required.
Despite the weight and size of an EVA Mooring Buoy being much less than a Steel Mooring Buoy under the same buoyancy requirement, it is more long-lasting (10 years or more) and maintenance-free for long-term operation.  In the case of collision, the soft, lightweight and high abrasive EVA material will significantly reduce the impact forces and cause no damage to the Boat and the Buoy.  Over a period of time, when marine barnacles are found on the surface and underneath an EVA Mooring Buoy, it (only weighs 1/4 of a Steel Buoy) can be easily flipped over 90 degrees on the surface and cleaned in place without removal and repainting.  EVA-Polyurea Mooring Buoys overcame most of the previous problems on Steel Mooring Buoys and waived the ongoing maintenance costs.
There are many Steel-Fibreglass Through Chain Buoys and HDPE Buoys available nowadays.  The cylindrical body of a Steel-Fibreglass or HDPE Mooring Buoy will indeed last better in seawater than a Steel Buoy; however, its hollow structure or middle shaft made in mild steel may pull apart from the cylindrical body due to rusty and worn out after a couple of years.  Eventually, the heavy rust and marine barnacles generated inside the hollow structure will seize the Chain inside the Through Chain Buoy.  Besides the problems of the hollow structure and middle shaft, some HDPE Buoys are too narrow and too high; please note that the higher the Mooring Buoy afloat on the surface, the higher the chance of leaning sideways causes the growth of marine barnacles on the top half of the Mooring Buoy.

That is why we only tailor-made all EVA-Polyurea Mooring Buoys based on the Customer’s Boat and Chain requirements.  EVA Buoys made by us are available in two versions: Middle Shaft Version consists of a middle shaft with top and bottom mooring rings are all-in-ones made of stainless steel which fully wrapped around by EVA, then entirely sprayed with Polyurea for watertight, maintenance-free and long-lasting; or the Through Chain Version consists of a stainless steel hollow structure that allows the Chain to go through.  The colour choice of Yellow, Green and Red is available upon request.

Mooring Chains, Swivel and Shackles

A Mooring Chain connects the Mooring Buoy to the Concrete Sinker underwater, but most Boat Owners did not get what they paid for!  The material composition of the Chain makes a world difference in its pulling strength and durability, although they all 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 cheaper but erode much quicker in seawater conditions, and the pulling strength is 40 % less than the Grade II Chains.  Grade II Chains are commonly used for Private Boat Mooring, while Grade III Chains are mainly used for Oceangoing Vessels.
The water depth primarily decides the Length of a Mooring Chain at the mooring area.  Once the Chain Length is identified, a Mooring Chain (No matter Grade II or Grade III, Stud-Link or Open-Link) should be tailor-made at the Chain Factory by fitting an Enlarged End-link at both ends of the Chain, especially the Stud-link Chain, for connecting with the standard Type-D Anchor Shackle (It is usually 40 % bigger than a normal Chain-link), and preferable fitting a set of standard Swivel (being installed at about one meter below the Mooring Buoy).  The whole length of the Mooring Chain with all required fittings will then be load-tested to standard and coated with Black Asphalt Paint for delivery.  Hot-dipped galvanised finishing that better reduces marine barnacles in seawater conditions can be done at additional costs.
Boat Owners should not accept Chains that are cut from the Contractor’s existing local stock, as such Chains have no Enlarged End-links at both ends, no standard Swivel fitted, and no load-testing has been done.  These Chains, especially the Stud-link Chains, may only be connected with the undersized or inadequate Shackles.

Concrete Sinkers

Unlike nowadays, most Concrete Sinkers laid before were undersized (did not meet the required weight) due to the lack of prior inspection by the Authority.  A Concrete Sinker that meets the necessary weight (the cubic volume) for assessment seems a simple matter for most Contractors nowadays.  However, the Lifting Eye Ring is always and still undersized!
First of all, if the Lifting Eye Ring is too small (Ring diameter and radius), the standard Type-D Anchor Shackle (40 % bigger than a normal Chain-link) can’t go through; thus, a non-standard or undersized Shackle has to be used.
Secondly, after these undersized Lifting Eye Ring and Shackle submerge underwater for a couple of years, would they still be able to sustain the Mooring Chain’s pulling forces during a heavy storm?  Would they pull apart underwater during the subsequent lift for Chain renewal?  If it does happen, the Boat Owner has to pay for a new Sinker and reinstallation again

Mooring Lines

Finally, no matter how good a Mooring System has been made and installed, improperly secured or misusing an undersized Swivel on the Mooring Lines may also cause the Boat to be lost during a heavy storm.  About ten Boats were lost after the Super Typhoon [Mangkhut] because of the failure of the stainless steel swivel on the Mooring Lines. 

Liability of the Mooring System 

Boat Owners or Yacht Clubs are not always aware of all the requirements of a Mooring System.  Even some Contractors do not fully understand all the standards and requirements or choose to ignore them if the fulfilment cost is comparatively higher.  
Nevertheless, the Boat Owners are ultimately responsible for the quality and compliance of the entire Mooring System.  In case of any failure during a heavy storm, when you proceed with the damage claims (your Boat and the implicated parties) against the Boat Insurance Company, they will then employ an expert to inspect and verify the entire Mooring System for non-compliance.  
Selecting a Professional Contractor for the job in the first place is highly recommended.

Our Quality Products and Services

Kinetic Key Company Limited (KKCL) has been a Professional Contractor in Marine Works in Hong Kong and China (PRC) for more than 40 years.  KKCL established Production Lines in mainland China to tailor-made the EVA-Polyurea Mooring Buoys and Marine Solar-lighted Warning Buoys (Class 1 & Class 2) upon Customer’s Boat or Project requirements, including supplying all required Mooring Components such as Mooring Chains with standard Swivel, Type-D Anchor Shackles and Concrete Sinkers etc.  All Products fully meet the Hong Kong Marine Department’s requirements.
If you are interested in purchasing an EVA Mooring Buoy, a s
ample is available at our warehouse in the New Territories for your inspection and hands-on experience upon request.

BD_1
BD_2
Chain_Baddly Worn
Chain_wear and tear
Rusty and Holed Steel Buoy
Worn Eye Ring
Worn Mooring Eye
TC Buoy_Chain Shackle
GRP TC Buoy_1
TCD_Buoy Condition_3
Steel TC Buoy_5.1
Damaged TC Buoy_2
D_Buoy
Buoys leaning sideways
Leaning Sideways
MB_Installation_I
MB_4
Precast_EVA_Assembly_3
Polyurea Spraying_1
EVA-Polyurea Buoys_6
MS_EVA-Polyurea_Buoys_P_2
MS_EVA-Polyurea_Buoys_P_1
Buoys in water
Chain
Open Link Galvanized Chain_2
Stud-Link Chain_4
Chain with Swivel_2
Swivel_8
JS_1
Anchor Shackle Locking_4
末端卸扣和加大環及轉環
末端卸扣和轉環
Sinker Eye_12 Tons_1
Chain Connection with Enlarged-End Link_Type-D Anchor Shackle
Lifting Eye and Shackle_1
asdhi8
3 Tons Sinker SS Eye
Sinker
CR_1_resized
BR_4_resized
MB_2
Boats_EVA_Buoys_2
Manufacturing of EVA-Polyurea Buoys
EVA Buoys after Numbering_3

 EVA-Polyurea Mooring Buoys Vs Traditional Steel Mooring Buoys

Item

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 Middle Shaft are all-in-ones made of stainless steel; no painting and maintenance is required. A Steel Mooring Buoy and its top and bottom Mooring Rings made in mild steel will require continuous maintenance, including removal, repairing, anti-fouling painting and replacement almost every two years.

2.

Pulling Forces

Sustaining all pulling forces by the Middle Shaft.  The Mooring Buoy itself only acts as a floatation unit to support the weight of the Mooring Chain.  Sharing the 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.

Collision

The cylindrical body of an EVA-Polyurea Mooring Buoy is a soft, lightweight and high abrasive material.
In case of collision, the impact forces will significantly 
reduce, causing no damage to the Boat and the Buoy.
Damage to the Steel Mooring Buoy and the Boat even in a minor collision.

4.

Weight

An EVA-Polyurea Mooring Buoy of 1.0 meters in Diameter only weighs about 120 Kg.  The Mooring Buoy’s material (EVA) is lightweight (buoyant), long-lasting and maintenance-free. A Steel Mooring Buoy of 1.0 meters in Diameter weighs about 550 Kg.  In case of ageing or damage (cracked and holed), it will sink; unless filled with Styrofoam inside.  But it will require additional costs and procedures.

5.

Buoyancy

The weight of a Mooring Chain 26 mm x 12 meters in length is about 170 Kg (downward force).  In order to maintain 1/31/2 of the Mooring Buoy stays afloat on the surface as required, an EVA-Polyurea Mooring Buoy of 0.8 meters in Diameter only needs 0.8 meters in Height to offset the downward forces and maintain about 0.4 meter stays afloat on the surface. In order to maintain 1/31/2 of the Mooring Buoy stays afloat on the surface as required, a Steel Mooring Buoy of 1.0 meters in Diameter needs about 1.2 meters in Height to offset the downward forces and maintain about 0.6 meters stay afloat on the surface.
Higher the Mooring Buoy afloat on the surface, the higher the chance of leaning sideways, which causes the growth of marine barnacles and wearing out on the top half of the Mooring Buoy.

6.

Maintenance and Durability

An EVA-Polyurea Mooring Buoy is very lightweight (Only weighs 1/4 of a Steel Buoy); over a period of time, when marine barnacles are found on the surface and underneath 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 under normal usage without extensive care. Over a period of time, when rusty and marine barnacles are found on the surface and underneath 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.

EVA-Polyurea Buoys Vs Traditional Steel Buoys

Item Considerations EVA-Polyurea Buoys  Steel Buoys

1.

Rusty and Worn Out

EVA-Polyurea Mooring Buoy will never get rusty and worn out.  The top and bottom Mooring Rings and Middle Shaft are all-in-ones made of stainless steel; no painting and maintenance is required. A Steel Mooring Buoy and its top and bottom Mooring Rings that are made with mild steel will require continuous maintenance, including removal, repairing, anti-fouling painting and replacement almost every two years.

2.

Pulling Forces

Sustained all pulling forces by the Middle Shaft.  The Mooring Buoy itself only acts as a floatation unit to support the weight of the Mooring Chain.  Sharing the 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.

Collision

The cylindrical body of an EVA-Polyurea Mooring Buoy is a soft, lightweight and high abrasive material.
In case of collision, the impact forces will significantly reduce
, causing no damage to the Boat and the Buoy.
Damage to the Steel Mooring Buoy and the Boat even in a minor collision.

4.

Weight

An EVA-Polyurea Mooring Buoy of 1.0 meters in Diameter only weighs about 120 Kg.  The Mooring Buoy’s material (EVA) is lightweight (buoyant), long-lasting and maintenance-free. A Steel Mooring Buoy of 1.0 meters in Diameter weighs about 550 Kg.  In case of ageing or damage (cracked and holed), it will sink; unless filled with Styrofoam inside.  But it will require additional costs and procedures.

5.

Buoyancy

The weight of a Mooring Chain 26 mm x 12 meters in length is about 170 Kg (downward force).  In order to maintain 1/31/2 of the Mooring Buoy stays afloat on the surface as required, an EVA-Polyurea Mooring Buoy of 0.8 meters in Diameter only needs 0.8 meters in Height to offset the downward forces and maintain about 0.4 meter stays afloat on the surface. In order to maintain 1/31/2 of the Mooring Buoy stays afloat on the surface as required, a Steel Mooring Buoy of 1.0 meters in Diameter needs about 1.2 meters in Height to offset the downward forces and maintain about 0.6 meters stay afloat on the surface.
Higher the Mooring Buoy afloat on the surface, the higher the chance of leaning sideways, which causes the growth of marine barnacles and wearing out on the top half of the Mooring Buoy.

6.

Maintenance and Durability

An EVA-Polyurea Mooring Buoy is very lightweight (Only weighs 1/4 of a Steel Buoy); over a period of time, when marine barnacles are found on the surface and underneath the Mooring Buoy, it can be easily flipped over 90 degrees on the surface and cleaned in place without removal and repainting.  An EVA-Polyurea Mooring Buoy is long-lasting and maintenance-free; it may last for 10 years under normal usage without extensive care. Over a period of time, when rusty and marine barnacles are found on the surface and underneath 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 and Marine Solar-lighted Wreck Buoys

All Non-metal Mooring Buoys and Marine Solar-lighted Warning Buoys (Class 1 and Class 2) are tailor-made at our Factories in mainland China (PRC) to the Customer’s Boat and Project requirements.  All Products fully meet the Hong Kong Marine Department requirements.
KKCL also designed and supplied the EVA-Polyurea Wreck Buoys with Solar-lighted Lantern to the 
Hong Kong Marine Department as requested.
The manufacturing processes of the EVA-Polyurea Middle Shaft Mooring Buoys, Marine Solar-lighted Wreck Buoys and GRP-PU Through Chain Mooring Buoys are as follows:

 1. Firstly, assemble the Pre-cast EVA with the all-in-one stainless steel middle shaft or build up the Fiberglass (GRP) Module with the stainless steel hollow structure to form the size of a required Mooring Buoy.
2.  Secondly, spray the EVA cylindrical body with several coats of Polyurea mixed with the desired colour by the Computerized Spraying System.  Polyurea is a newly developed material that is very high abrasive, heat resistant and never worn out; it will dry immediately upon spraying.
For Fiberglass (GRP) Through Chain Buoys, install the Reinforced Rubber Fenders first, then fill up the GRP Module entirely with rigid Polyurethane (PU).  A separate stainless steel Mooring Ring will be provided with each Through Chain Buoy for proper chain connection with a Kenter Shackle.
3. Finally, dress up, mark the Buoy Number assigned, anti-fouling painting, and pack up for delivery.

Buoys Production

All Non-metal Mooring Buoys and Marine Solar-lighted Warning Buoys (Class 1 and Class 2) are tailor-made at our Factories in mainland China (PRC) to the Customer’s Boat and Project requirements.  All Products fully meet the Hong Kong Marine Department requirements. KKCL also designed and supplied the EVA-Polyurea Wreck Buoys with Solar-lighted Lantern to the Hong Kong Marine Department as requested. The manufacturing processes of the EVA-Polyurea Middle Shaft Mooring Buoys, Marine Solar-lighted Wreck Buoys and GRP-PU Through Chain Mooring Buoys are as follows:

1.  Firstly, assemble the Pre-cast EVA with the all-in-one stainless steel middle shaft or build up the Fiberglass (GRP) Module with the stainless steel hollow structure to form the size of a required Mooring Buoy.
2.  Secondly, spray the EVA cylindrical body with several coats of Polyurea mixed with the desired colour by the Computerized Spraying System.  Polyurea is a newly developed material that is very high abrasive, heat resistant and never worn out; it will dry immediately upon spraying. For Fiberglass (GRP) Through Chain Buoys, install the Reinforced Rubber Fenders first, then fill up the GRP Module entirely with rigid Polyurethane (PU).  A separate stainless steel Mooring Ring will be provided with each Through Chain Buoy for proper chain connection with a Kenter Shackle.
3.  Finally, dress up, mark the Buoy Number assigned, anti-fouling painting, and pack up for delivery.

Boat Mooring Requirements in Hong Kong

The size of a Mooring System depends on the Boat’s total length.  The Mooring Chain’s size and the Concrete Sinker’s weight required will be specified in the Letter of Permission from the Hong Kong Marine Department.  The type and the size of the Mooring Buoy are not listed; however, the Mooring Buoy is required to have sufficient buoyancy to support the weight of the Chain at the fullest stretch and should be 33 – 50 % greater than the combined weight of the suspended components (i.e. 1/31/2 of the Buoy should stay afloat on the surface after it has been chained up).

Generally, a Boat’s total length between 5 – 8 meters will use a Chain size of 12 – 18 mm, an EVA Mooring Buoy of 0.6 meters in diameter will be used; a Boat’s total length between 9 – 11 meters will use a Chain size of 25 – 32 mm, an EVA Mooring Buoy of 0.7 – 0.8 meter in diameter will be required.  A Boat’s total length between 11 – 26 meters will use a Chain size of 32 – 40 mm; an EVA Mooring Buoy of 1.0 meters in diameter will be required; a Boat’s total length between 24 – 41 meters will use s Chain size of 40 – 45 mm, an EVA Mooring Buoy of 1.1 – 1.2 meters in diameter will be required.  A Boat’s total length of 42 – 56 meters will use a Chain size of 50 mm, and an EVA Mooring Buoy of 1.3 meters in diameter (dependent upon the water depth and Chain Length) will be required.  Please note that the Buoys’ diameter mentioned above will be much bigger and heavier if Steel Mooring Buoys are used.

EVA Mooring Buoys and Marine Solar-lighted Warning Buoys

Our EVA-Polyurea Mooring Buoy made with stainless steel Middle Shaft is very lightweight (buoyant), softhigh abrasive and never worn outIt may last for ten years without extensive care.

With our fully equipped Production Lines in mainland China (PRC), the cost of making an EVA-Polyurea Mooring Buoy is very compatible with making a Steel Mooring Buoy with Styrofoam inside and Fiberglass outside, but the durability and maintenance-free are much better. 

Kinetic Key Company Limited (KKCL) is more than capable of supplying and installing the full range of Mooring Facilities (Mooring Buoys, Mooring Chains and Concrete Sinkers etc.) and Marine Solar-lighted Warning Buoys (Class 1 or Class 2) for the Yacht Clubs, Private Boat Owners and Marine Construction Companies.  All Products fully meet the Hong Kong Marine Department’s requirements.
If you are interested in purchasing an EVA-Polyurea Mooring Buoy, a sample is available at our warehouse in the New Territories for your inspection and hands-on experience upon request. 

Commercial Diving Services

KKCL is currently an Exclusive Diving Contractor of the Hong Kong Government Dockyard, responsible for providing emergency underwater services to over 200 Government Vessels patrolling in Hong Kong water.
Underwater Services of mooring facilities, wreck recovery and marine maintenance etc., for the Yacht Clubs, Private Boat Owners and Marine Construction Companies are also available upon request.

For inquiry, please contact Mr Li at (852) 6952 8400 or (86) 138 2522 3300 or E-mail kkli@kkcl.com.hk.  We are confident that our Professional Teams will offer the best solutions for your inquiries.

Buoy Markings_1
MS_EVA-Polyurea_Buoys_P_3
Polyurea Spraying_2
EVA Buoys after Numbering_6
Polyurea Sprayed_2
Stud Link Chain_3
Standard Anchor Shackle_38 mm_1
Swivel Set_轉環組_1
IMG_20200608_105518
Solar-lighted Warning Buoys_s
Light Buoy_1
監測浮標_Light Buoy
Warning Light Buoy_PE 塑料_3
CD_4
CD_5
CD_1

Boat Mooring Requirements in Hong Kong

The size of a Mooring System depends on the Boat’s total length.  The Mooring Chain’s size and the Concrete Sinker’s weight required will be specified in the Letter of Permission from the Hong Kong Marine Department.  The size and the type of Mooring Buoy are not listed; however, the Mooring Buoy is required to have sufficient buoyancy to support the weight of the Chain at the fullest stretch and should be 33 – 50 % greater than the combined weight of the suspended components (i.e. 1/31/2 of the Buoy should stay afloat on the surface after it has been chained up).

Generally, a Boat’s total length between 5 – 8 meters will use a Chain size of 12 – 18 mm, an EVA Mooring Buoy of 0.6 meters in diameter will be used; a Boat’s total length between 9 – 11 meters will use a Chain size of 25 – 32 mm, an EVA Mooring Buoy of 0.7 – 0.8 meter in diameter will be required.  A Boat’s total length between 11 – 26 meters will use a Chain size of 32 – 40 mm; an EVA Mooring Buoy of 1.0 meters in diameter will be required; a Boat’s total length between 24 – 41 meters will use a Chain size of 40 – 45 mm, an EVA Mooring Buoy of 1.1 – 1.2 meters in diameter will be used.  A Boat’s total length of 42 – 56 meters will use a Chain size of 50 mm, and a Mooring Buoy of 1.3 meters in diameter (dependent upon the water depth and Chain Length) will be required.  Please note that the Buoys’ diameter mentioned above will be much bigger and heavier if Steel Mooring Buoys are used.

EVA Mooring Buoys and Marine Solar-lighted Warning Buoys

Our EVA-Polyurea Mooring Buoy made with stainless steel Middle Shaft is very lightweight (buoyant), softhigh abrasive and never worn out.  It may last for ten years without extensive care.

With our fully equipped Production Lines in mainland China (PRC), the cost of making an EVA-Polyurea Mooring Buoy is very compatible with making a Steel Mooring Buoy with Styrofoam inside and Fiberglass outside, but the durability and maintenance-free are much better. 

Kinetic Key Company Limited (KKCL) is more than capable of supplying and installing the full range of Mooring Facilities (Mooring Buoys, Mooring Chains and Concrete Sinkers etc.) and Marine Solar-lighted Warning Buoys (Class 1 or Class 2) for the Yacht Clubs, Private Boat Owners and Marine Construction Companies.  All Products fully meet the Hong Kong Marine Department’s requirements.
If you are interested in purchasing an EVA-Polyurea Mooring Buoy, a sample is available at our warehouse in the New Territories for your inspection and hands-on experience upon request.
 

Commercial Diving Services

KKCL is currently an Exclusive Diving Contractor of the Hong Kong Government Dockyard, responsible for providing emergency underwater services to over 200 Government Vessels patrolling in Hong Kong water.
Underwater Services of mooring facilities, wreck recovery and marine maintenance etc., for the Yacht Clubs, Private Boat Owners and Marine Construction Companies are also available upon request.

For inquiry, please contact Mr Li at (852) 6952 8400 or (86) 138 2522 3300 or E-mail kkli@kkcl.com.hk.   We are confident that our Professional Teams will offer the best solutions for your inquiries.


Buoy Markings_1
MS_EVA-Polyurea_Buoys_P_3
Polyurea Spraying_2
EVA Buoys after Numbering_6
Polyurea Sprayed_2
Stud Link Chain_3
Standard Anchor Shackle_38 mm_1
Swivel Set_轉環組_1
IMG_20200608_105518
Solar-lighted Warning Buoys_s
Light Buoy_1
監測浮標_Light Buoy
Warning Light Buoy_PE 塑料_3
CD_4
CD_5
CD_1