Hardware for the installation of offshore oil & gas
and wind turbine structures

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Grout Seals

The CRUX Grout Seal is a passive grout support system, requiring no activation. The action of pile installation through the Grout Seal sets up a hoop tension in the reinforced bulbous ring. The resultant radial reaction of the bulbous ring acting against the pile associated with the hoop tension then counteracts the grout pressure forces.

The system accepts the tolerance, which must be provided within pile centralisers without significant loss of capacity. The bulbous ring positions itself to locate around the pile at its position within the centraliser shims.

A single Grout Seal unit has the capacity to support 30 metres or more of submerged grout. Capacity can be increased by adding more core fabric within the bulbous ring. Where grout pressure heads exceed the level for which it is prudent to use a single unit, capacity can be achieved by provision of a dual system, with support capacity shared between two Grout Seals.

Fitting is achieved by insertion between two pre-installed keeper plates. The fixing toroid is then filled and pressurised with epoxy to provide an effective and secure fixing.

Grout Seals can be pre-fitted in Cans which are then delivered to the fabrication yard for connection to the structure or, alternatively, they may be site fitted. In either case no site commissioning is required.

Grout Seals
Grout Seals

Advantages to using CRUX Grout Seal Systems

  • No hoses, valves or other hardware to purchase, fit or test. This results in clear cost savings and eliminates the dominant cause of frequent grout support system failure.
  • No site testing or commissioning required.
  • The Grout Seal also functions as a wiper, preventing seabed material from entering the annulus to the detriment of grout connection strength.
  • No offshore operation is required.
  • No residual activation hardware remains to cause cathodic protection drain or diver hazard.
PILE SIZE DIMENSIONS in mm
in inches A B C D E
20 50 65 50 702 20
24 60 71 50 830 20
30 60 75 55 980 20
36 62 78 60 1130 20
42 65 84 65 1290 22
48 65 84 65 1432 22
54 65 104 70 1614 22
60 65 104 70 1758 22
66 70 114 75 1928 24
72 70 114 75 2070 24
84 70 129 90 2382 25
96 70 134 90 2676 25
108 70 154 90 3000 25

NOTE: Inside Can Diameter, D, may be varied to a limited extent.