PIPELINE FREE SPAN CORRECTION [PATENTED]

CSUB provides composite support structures for pipeline freespan correction when post-installation intervention is required. Designed for demanding offshore projects, these solutions help operators and contractors address unsupported spans caused by seabed scouring, changing seabed conditions and other subsea support challenges with practical offshore installation and long-life corrosion-free performance.

Freespans can develop after pipeline installation due to seabed irregularities, scour or changing subsea conditions. When unsupported spans exceed acceptable limits, corrective support may be required to restore stable support conditions and reduce integrity risk. CSUB delivers subsea support structures designed specifically for this type of post-installation freespan correction.

CSUB’s pipeline freespan correction solutions are developed to suit the actual span geometry, pipeline or spool configuration, seabed profile and installation constraints of each project. This helps operators, contractors and subsea suppliers implement support structures that are aligned with real field conditions rather than relying on standardised remedial concepts.

Depending on access, clearance and seabed conditions, CSUB can provide support structures that are pulled into position beneath the pipeline or bridge/tower-type structures designed for alternative support arrangements. These concepts are developed for practical subsea deployment, including ROV-assisted installation, helping reduce offshore handling complexity and avoid more disruptive intervention methods where project conditions allow.

Post-Installation Intervention with Lower Offshore Complexity

CSUB’s lightweight composite structures are designed for practical offshore handling and deployment in post-installation correction campaigns. This can help reduce vessel time, simplify lifting and improve installation planning compared with heavier traditional alternatives.

Long-Life Corrosion-Free Performance

Non-metallic GRP construction eliminates metallic corrosion exposure and supports durable subsea performance over time. This helps reduce corrosion-related maintenance uncertainty and lifecycle burden in demanding offshore environments.

Project-Specific Engineering Support

CSUB supports each freespan correction project with engineering input, solution selection, technical adaptation and project documentation. This helps lower technical and procurement risk while giving project teams greater confidence in the selected support method.

CSUB combines subsea support-structure expertise with composite fabrication capability to develop practical freespan correction solutions for installed pipelines and spools. From concept development and structural assessment to fabrication and delivery support, CSUB helps customers implement corrective support solutions that are technically credible, practical to install and aligned with project requirements.