Subsea Protection Covers

CSUB Protection Covers are used to protect subsea pipelines, equipment and structures from external impact from dropped objects, trawl and anchor loads.

The combination of strength and flexibility of the GRP material used in the Subsea Protection Covers provide unique properties to absorb energy from dropped object/trawls. Testing has been performed up to more than 300 kJ, and based on this result we can simulate and analyze any impact. High impact covers with approx. 500 kJ has been delivered and CSUB has designed covers with impact requirement up to 800 kJ.

All GRP structures are designed according to NORSOK requirement and DnVGL-ST-C501 Composite Components.

The structures are designed to be over trawlable. Extensive testing at SINTEF Denmark has been performed resulting in over trawlable and snag free solutions with considerably lower loads than those specified by the NORSOK standard. The optimized design requires less stabilization measures and gives lighter, more cost-efficient structures as well as avoiding damage to fishing gear.

The low weight of the GRP Protection Covers has benefits for cost, required size of installation vessel and impact to soft soil areas. It can either be stabilized by rock dump or using ballast and skirt solutions designed by CSUB.

Subsea Pipeline Protection Covers

CSUB Pipeline Protection Covers should be used when there is a requirement for none contact protection of subsea pipelines.

The GRP Covers are installed in areas where it is determined a risk for dropped object or trawl activities. By using GRP Covers over the subsea pipeline in expansion loop areas, the pipeline can move freely within the protection structures.

The Subsea Pipeline Protection Covers can be designed for straight spools, Z-spools, L-Spools and flexible spools. The GRP Covers are stackable for efficient transport and deployment, also allowing for wet storage during installation.

Subsea Structure Protection Covers

Subsea equipment such as Manifolds, Trees, ILT’s, PLEM’s, PLETs, UTA’s, UTH’s require in most cases to be protected from dropped objects and/or trawl boards and dragged anchors.

CSUB has developed protection systems for all subsea equipment taking into consideration soil condition, deployment, stability, access for installation and inspection, ROV Access and exits of current or future lines etc.

For large structures, GRP Structure Protection Covers will have a major advantage compared to traditional steel solutions due to lower weight.

CSUB in-house engineering department can perform ROV checks to demonstrate access for ROV for all vital parts.

Karsten W. Johannessen
VP Sales

Jon Inge Brattekås

Mathias Berg
VP Sales