Njord NBs are an off-the-shelf range of subsea modular buoys, for moderate subsea uplift. Suitable for subsea equipment installation, each buoys core varies in density to suit individual project water depth requirements. 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.

Download: Njord NB Product Sheet
Benefits

Nesting design


Easy to use slings


Durable rotomolded shells


Long life


Adjustable uplift


Quick and easy deployment

Application

Pipeline sleds


Jumpers


Suspended moorings


Offshore installations

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Njord NB assemblies
Each Njord NB 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. Njord NB assemblies are available at depth ratings from 1,000 to 4,000 meters. Please see chart below for uplift per depth rating.
Assemblies Depth rating (m) Standard buoyancy (lbs) +/- 5% Upper weight limit (lbs) Lower weight limit (lbs)

2 Ends

 1,000 174 158 141
2 Ends + 1 Mid
 1,000 270 254 228
2 Ends + 2 Mid
 1,000 366 350 315
2 Ends + 3 Mid
 1,000 463 447 402
2 Ends + 4 Mid
 1,000 559 543 488
2 Ends + 5 Mid
 1,000 655 640 575
2 Ends  1,500 171 160 144
2 Ends + 1 Mid
 1,500 266 258 232
2 Ends + 2 Mid
 1,500 361 356 320
2 Ends + 3 Mid
 1,500 456 453 409
2 Ends + 4 Mid
 1,500 550 551 497
2 Ends + 5 Mid
 1,500 645 649 585
2 Ends 2,000 161 169 154
2 Ends + 1 Mid
 2,000 250 273 249
2 Ends + 2 Mid
 2,000 339 376 343
2 Ends + 3 Mid
 2,000 428 480 438
2 Ends + 4 Mid
 2,000 517 583 533
2 Ends + 5 Mid
 2,000 605 687 627
2 Ends 2,500 146 183 170
2 Ends + 1 Mid
 2,500 226 296 274
2 Ends + 2 Mid
 2,500
 306 408 378
2 Ends + 3 Mid
 2,500
 385 520 483
2 Ends + 4 Mid
 2,500  465 632 587
2 Ends + 5 Mid
 2,500  544 745 691
2 Ends 3,000  137 193 180
2 Ends + 1 Mid
 3,000  210 311 291
2 Ends + 2 Mid
 3,000  284 429 401
2 Ends + 3 Mid
 3,000  357 547 512
2 Ends + 4 Mid
 3,000  431 665 622
2 Ends + 5 Mid
 3,000  505 783 733
2 Ends 4,000  111 218 207
2 Ends + 1 Mid
 4,000  169 350 335
2 Ends + 2 Mid 4,000  226 483 335
2 Ends + 3 Mid
 4,000  284 617 589
2 Ends + 4 Mid
 4,000  341 750 716
2 Ends + 5 Mid
 4,000  399 883 844
Each Njord NB is manufactured from a low density syntactic foam core, encapsulated with a high density polyethylene shell for impact and abrasion protection. A matching soft sling is available for all assembly sizes. Njord NB assemblies are available at depth rating from 1,000 to 4,000 meters. Please see chart below for uplift per depth rating.


Assemblies Depth rating (m) Standard buoyancy (lbs) +/- 5% Upper weight limit (lbs) Lower weight limit (lbs)

2 Ends

1,000

169

162

146
2 Ends + 1 Mid  1,000  262 262 236
2 Ends + 2 Mid  1,000  355 361 326
2 Ends + 3 Mid   1,000  449 460 416
2 Ends + 4 Mid   1,000  542 559 506
2 Ends + 5 Mid 
 1,000  635 658 596

2 Ends

1,500

152

179

164
2 Ends + 1 Mid  1,500  234 289 265
2 Ends + 2 Mid  1,500  317 397 366
2 Ends + 3 Mid   1,500  400 506 467
2 Ends + 4 Mid   1,500  483 615 565
2 Ends + 5 Mid 
 1,500  566 725 669

2 Ends

2,000

139

190

177
2 Ends + 1 Mid  2,000  215 307 286
2 Ends + 2 Mid  2,000  290 423 395
2 Ends + 3 Mid   2,000  365 539 504
2 Ends + 4 Mid   2,000  441 655 612
2 Ends + 5 Mid 
 2,000  516 772 721

2 Ends

2,500

120

209

198
2 Ends + 1 Mid  2,500  183 337 320
2 Ends + 2 Mid  2,500  246 465 441
2 Ends + 3 Mid   2,500  309 593 563
2 Ends + 4 Mid   2,500  372 721 685
2 Ends + 5 Mid 
 2,500  435 849 806

2 Ends

3,000

107

221

211
2 Ends + 1 Mid  3,000  163 356 340
2 Ends + 2 Mid  3,000  218 491 470
2 Ends + 3 Mid   3,000  274 626 599
2 Ends + 4 Mid   3,000  330 761 729
2 Ends + 5 Mid 
 3,000  385 896 858

2 Ends

4,000

91

236

228
2 Ends + 1 Mid  4,000  137 380 368
2 Ends + 2 Mid  4,000  183 525 508
2 Ends + 3 Mid   4,000  228 669 647
2 Ends + 4 Mid   4,000  274 814 787
2 Ends + 5 Mid 
 4,000  320 958 927

1,000
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