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Chain Through, Cylindrical and Spherical Buoys

Chain Through Buoys (CTB)

Bridon Chain Through Buoys are widely used in SPM systems for greater security and to reduce tangling. These buoys are resistant to high impact shock loads and are virtually unsinkable.

Manufactured with a central steel tube, to allow the chain to pass through, they are fitted with either locking plates or single/double locking pins to retain the chain.
Auxiliary lifting eyes are fitted at each end of the buoy to aid handling.

The external steelwork is bitumastic coated for protection. The type of end fittings required, should be specified by the customer at the enquiry stage.

Buoy Size

Nett Buoyancy

Weight

Body Length

O/A Length

Body Dia.

Tube Size

lb

kg

m

m

m

mm

CTB20

2000

569

1.68

2.13

1.14

330

CTB30

3000

612

1.68

2.13

1.30

330

CTB40

4000

675

1.90

2.36

1.37

330

CTB50

5000

780

1.98

2.44

1.49

381

CTB60

6000

858

2.13

2.59

1.55

381

CTB80

8000

1165

2.91

3.35

1.56

432

CTB90

9000

1163

2.61

3.05

1.70

432

CTB100

10000

1397

2.61

3.05

1.82

483

CTB120

12000

1564

3.22

3.66

1.78

483

Cylindrical Buoys (CB) and Spherical Buoys (SB)

Bridon Cylindrical and Spherical Buoys are used extensively for mooring, marker and pick-up applications.

They have sufficient buoyancy to support heavy items of chain in SPM systems, messenger lines and hoses. The central steel tension member provides a minimum lifting force 21/2 times the nett buoyancy of the buoy and comes with either galvanised shackle blocks or swivel ends.

Cylindrical Buoys (CB)

Buoy Size

Nett Buoyancy

Weight

Body Length

O/A Length

Body Dia.

lb

kg

m

m

m

CB5

500

74

1.38

1.16

0.63

CB10

1000

95

1.43

1.21

0.81

CB15

1500

119

1.46

1.24

0.96

CB20

2000

201

1.48

1.22

1.10

CB30

3000

260

1.64

1.38

1.26

CB40

4000

308

2.10

1.84

1.26

CB50

5000

382

2.01

1.75

1.44

CB60

6000

439

2.03

1.77

1.56

CB80

8000

560

2.29

1.97

1.70

CB100

10000

700

2.47

2.14

1.83

CB120

12000

805

2.77

2.45

1.86

Spherical Buoys (SB)

Buoy Size

Nett Buoyancy

Weight

O/A Length

Body Dia.

lb

kg

m

m

SB 5

500

82

1.04

0.89

SB 10

1000

107

1.22

1.08

SB 15

1500

139

1.38

1.22

SB 20

2000

221

1.46

1.33

SB 25

2500

238

1.54

1.39

SB 30

3000

269

1.67

1.49

SB 40

4000

307

1.80

1.64

SB 50

5000

444

1.95

1.79

SB 60

6000

484

2.05

1.86

These tables are for guidance purposes only with no guarantee or warranty (express or implied) as to their accuracy. The products described may be subject to change without notice, and should not be relied on without further advice from Bridon. View the full disclaimer here.