TOOLING MATERIALSApplication / Marine and subsea
Select the buoyancy system by operating depth, pressure and required net lift. Shallow-water foam and deep-sea epoxy buoyancy blocks have different structures and qualification requirements. Surface protection must be selected with the buoyancy material.
Engineering requirements
01 / SHALLOW WATER
PUFOAM can be considered for surface and shallow-water buoyancy cores. Check water absorption, compression, joints and protection in the intended structure; a foam density alone does not establish an operating depth.
02 / DEEP SEA
For the deep-sea application, use an engineered epoxy syntactic buoyancy block: an epoxy matrix containing suitable hollow glass microspheres. Evaluate the finished block for hydrostatic pressure, water uptake, creep and retained buoyancy.
Surface protection
Polyurea is used as a protective coating in this material system. Specify adhesion to the buoyancy block, coverage at edges and penetrations, resistance to water exposure and repair of coating damage. It must not be substituted by a generic polyurethane casting resin.
Engineering requirements
| Design input | Why it matters |
|---|---|
| Operating and test pressure | The finished block and its interfaces need a defined pressure qualification; generic foam properties do not establish a depth rating. |
| Net buoyancy over time | Include block density, absorbed water, coating, inserts and long-term compression in the buoyancy budget. |
| Geometry and attachment | Define machining, insert loads, joints and coating continuity at penetrations. |
| Manufacturing quality | Control microsphere integrity, mixing, trapped voids, cure and surface preparation; verify the completed assembly. |