Subsea Protection Covers for Pipelines, Spools and Structures

CSUB designs GRP subsea protection covers for pipelines, spools and subsea structures exposed to dropped-object, trawl and anchor-load risk. Compared with heavier traditional alternatives, the low-weight composite design helps reduce handling complexity, support efficient installation and lower lifecycle burden while providing engineered protection for defined subsea load cases.

CSUB’s protection covers are engineered for project-specific load cases including dropped objects, trawl interaction and dragged anchor loads. Designed according to NORSOK requirements and DNVGL-ST-C501 Composite Components, the covers combine proven impact performance with practical offshore installation benefits and a documented engineering basis.

Proven Protection Performance

Impact testing has been performed above 300 kJ, with covers delivered for approximately 500 kJ and designs developed for requirements up to 600 kJ. This gives operators and contractors a protection solution supported by real testing and project-specific engineering.

Lower Installation and Seabed Burden

Low-weight, stackable GRP covers help simplify transport, loadout and offshore deployment while reducing lift demands and seabed impact in soft-soil areas. Optimised designs can also help reduce stabilisation requirements where project conditions allow.

Engineered for Real Subsea Conditions

Protection covers can be configured for pipeline movement, ROV access, inspection requirements, future tie-ins, ballast, skirts and rock-dump stabilisation. This helps align each solution with the actual asset, seabed and operational constraints of the project.

CSUB’s pipeline and spool protection covers are used where non-contact protection is required for subsea pipelines, straight spools, Z-spools, L-spools and flexible spools. In expansion loop areas, the cover design can allow the pipeline to move freely within the protection structure while maintaining the required level of protection.

CSUB also develops protection covers for subsea structures and equipment including manifolds, trees, ILTs, PLEMs, PLETs, UTAs and UTHs. These solutions are designed around soil conditions, deployment method, stability, access for installation and inspection, ROV operability and future line exits to support practical offshore execution and long-term asset protection.

CSUB supports customers with concept development, load-case assessment, stability design, structural analysis and project documentation through fabrication and delivery. This helps reduce technical and procurement risk while giving project teams a lower-weight protection solution that is practical to install and aligned with project requirements.