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Surface Support Buoys

General Surface Support Buoys

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Evergreen General Surface Support Foam Buoys are manufactured from a polyethylene thermo-laminated foam core encapsulated within self-colored polyurethane out skin. Used extensively in single point mooring (SPM) systems, the three main types of support buoy are: Cylindrical Buoys, Chain-Throught Buoys, Pick-Up Buoys.

Cylindrical  Buoys (YT-CB)Cylindrical foam buoys
l        Removable clevis plate/eye
l        Central tension member designed to suit the client’s Safe Working Load

Cylindrical Buoys (YT-CB)

Type

Buoyancy

(kg)

Length of body

(mm)

Length overall

(mm)

Diameter

(mm)

Weight in air

(kg)

YT—CB 1000

1000

1550

2200

1080

375

YT—CB 1250

1250

1550

2200

1160

380

YT—CB 1500

1500

2000

2666

1130

445

YT—CB 1700

1700

2000

2666

1180

455

YT—CB 1750

1750

2000

2666

1190

460

YT—CB 1850

1850

2000

2666

1230

470

YT—CB 2000

2000

2000

2666

1290

485

YT—CB 2250

2250

2000

2666

1340

500

YT—CB 2500

2500

2000

2666

1400

515

YT—CB 2800

2900

2000

2666

1510

595

YT—CB 3000

3000

2000

2666

1520

550

YT—CB 3200

3200

2000

2666

1560

560

YT—CB 3500

3500

2000

2666

1630

580

YT—CB 3900

3900

2000

2666

1705

605

 

Chain-Through Buoys (YT-CTB)Chain-Through foam buoys
l        Central tube for chain to pass through
l        Chain locking device, on one and or both, securing the buoy to the chain.

Chain-Through Buoys (YT-CTB)

Type

Buoyancy

(kg)

Length of body

(mm)

Length overall

(mm)

Diameter

(mm)

Weight in air

(kg)

YT—CTB 1500

1500

2000

2666

1195

520

YT—CTB 1750

1750

2000

2666

1260

545

YT—CTB 2000

2000

2000

2666

1325

560

YT—CTB 2250

2250

2000

2666

1395

580

YT—CTB 2500

2500

2000

2666

1450

610

YT—CTB 2750

2750

2000

2666

1505

630

YT—CTB 3000

3000

2000

2666

1565

658

YT—CTB 3500

3500

2000

2666

1680

750

YT—CTB 4500

4500

2000

2666

1900

880

Pick-up foam buoys

Pick-up Buoys (YT-PUB)
l        General purpose pick-up buoys are sued for mooring, marker and pick-up duties.

Pick-up Buoys (YT-PUB)

Type

Buoyancy

(kg)

Length of body

(mm)

Length overall

(mm)

Diameter

(mm)

SWL
(tonne)

Weight in air

(kg)

YT—PUB 90

90

665

1000

515

1.2

42

YT—PUB 225

225

914

1570

690

16

120

YT—PUB 400

400

914

1570

900

16

155

YT—PUB 800

800

914

1570

1150

16

180

Construction Features:

l        offshore buoysClosed-Cell Foam Core
The core is manufactured by batching up the resilient closed cell polyethylene closed cell foam and uniformly and continuously thermolaminating each layer together. The method ensures a bond stronger than the foam itself and eliminates the use of adhesives which can break down under long use. Useing of a polyethylene foam core ensure the buoy will not absorb water even if the skin is punctured, increasing the lifespan of the product and reducing maintenance costs. The resilient material makes the buys self fendering with a high impact absorption capacity.

l        PU-Skin
Surface BuoysThe core is encapsulated with a skin of high performance polyurethane elastomer, spray applied. Polyurethane elastomer is selected for the skin because of its high resistance to abrasion, fatigue and ultra violet degradation and is significantly more durable than polyethylene materials used in the construction of rotationally moulded buoys.

l        Steelwok and end assembly
Comprising through central steel tube with longitudinal gussets and external load distribution flanges at each end. A swivel assembly, certified 10 tonnes SWL, with bows at each end passes through the central tube.
All the material of swivel assembly are hot dip galvanized. Steelwork to be coal tar epoxy painted.


Material: Swivel assembly: bows to BS970
                Gusets, flanges carbon steel to BS EN10025 Fe 430 A or B
                Central tube to BS 6323 Pt 3 HFS 5
Finish: Swivel assembly hot dip galvanized to BS 729 Zn2/Zn4 at 610 g/m2
             Steelwok to be coal tar epoxy painted
Skin Colour: Orange, Yellow and othersface Buoys

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