Nano Buoys

Njord NB (Nano Buoy)

Trelleborg developed an off-the-shelf range of subsea modular buoys, called Njord NBs, for moderate subsea uplift. Suitable for subsea equipment installation, each buoy core varies in density to suit individual project water depth needs. By simply adding or removing individual units from the nested flotation stack, uplift can easily be adjusted. Njord NBs are engineered to offer a durable, short lead time option to complete our range of subsea buoyancy solutions. The unique nesting design of the individual buoyancy elements enables them to quickly assemble into a rigid structure with a specific uplift. The assemblies are held together and handled by using soft slings. The slings have numerous benefits including corrosion resistance, ease of handling, and no loss of buoyancy when compared to metal hardware. These soft slings are available for all assemblies to quickly and easily secure a nested buoyancy structure together for deployment.

Njord NBs are are manufactured from a low density carbon fiber macrospheres and syntactic foam. The core is then encapsulated in a high density polyethylene shell for impact and abrasion protection needed for the harsh offshore environment. Njord NB assemblies are available at depth ratings from 1,000 to 4,000 meters.

Nesting design

Easy to use slings

Durable rotomolded shells

Long life

Key Applications

Pipeline sleds

Jumpers

Suspended moorings

Offshore installations

Gallery

Nano Buoy Assemblies

Each Nano Buoy core is manufactured from low density syntactic foam and carbon microspheres. It is then encapsulated in a high density polyethylene shell for impact and abrasion protection. A matching soft sling is available for all assembly sizes.

Nano Buoy assemblies are available at depth ratings from 1,000 to 4,000 meters. Please see chart below for uplift per depth rating.

Nano Buoy Mid Element

Depth rating (m) Standard buoyancy, lbs(±5%) Estimated part density (lb/ft3) Trelleborg part #

1,000

96

30

1104497

1,500 95 31 1104498
2,000 89 33 1104499
2,500 80 36 1104500
3,000 73 38 1057886
4,000 58 43 1104501

Nano Buoy End Element

Depth rating (m) Standard buoyancy, lbs(±5%) Estimated part density (lb/ft3) Trelleborg part #

1,000

87

30

1104492

1,500 85 31 1104493
2,000 50 33 1104494
2,500 73 36 1104495
3,000 68 38 1057875
4,000 55 43 1104496

Nano Buoy Sling

All Slings are manufactured and tested via ASME B30.9

# of elements Sling length Trelleborg part#

2 end elements 

6 feet

1057877

2 end elements & 1 mid element
8 feet  1057878
2 end elements & 2 mid elements  10 feet  1057879 
2 end elements & 3 mid elements
12 feet 1057880
2 end elements & 4 mid elements
14 feet 1057881
2 end elements & 5 mid elements
16 feet 1057882
2 end elements & 6 mid elements  18 feet  1105690 
2 end elements & 7 mid elements  20 feet 1105691
product sheet
Trelleborg Nano buoys

Njord NB (Nano Buoyancy)

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