eSubsea is a supplier that design, manufacture and deliver fully certified clumps weights for ready for subsea deployment. Available for rental or sale. All subsea clump weights (CW) are designed, manufactured and tested according to applicable subsea standards as DNV 2.7-3 and NORSOK R-002/3 and are delivered with a full documentation package including design reports, material and testing certificates.

Standard Clump Weights

The standard types have submerged weights of 60 kg, 500 kg and 1000 kg with a simple barrel design with a certified and load tested DNV 2.7-3 padeye on the top. The standard clump weights padeyes have shackle interfaces to comply with lifting standards with no installation sea state limitation and actual out of plane loads. These gravity-based mooring anchors are suitable for installation in any water depth. All weights can be delivered with dedicated certified rigging on request.

The subsea DMAs are used for wide range of anchoring and mooring applications such as transponder anchor, mooring lines, subsea buoys, subsea protection structure, WLR systems, offshore wind mooring etc.

Custom Designed

Heavier clump weights can be custom designed to any size or shape based on client requirements and DNV 2.7-3/NORSOK R-002/3 with no limitation on the submerged weights. Normally the CW design is based on the required vertical holding capacity, but also the lateral sliding capacity can be designed for based on horizontal design loads and the soil conditions. The design can be modular if the vessel lifting capacity is limited. Certified and tested padeyes or load bars will be included as required. CW are normally used as anchoring or mooring when the soil conditions are hard as is the case for sand, silty sand and hard clay. If the seabed consists of softer clay, a better alternative is to use our suction anchors for seabed support.

Example 100 Tonn Custom Designed Clump Weight

The eSubsea clump weight for lateral loads are specially designed to provide maximum overturning stability and friction between the seabed and underside of the CW structure. Included in the documentation package will be a geotechnical evaluation with sliding and overturning capacity. 

As the structures will most often be subsea for a long time, they are painted with the high standard coating system according to NORSOK M-501 System 7. In addition, they have cathodic protection using sacrificial anodes.