Marine Pipes and Cables
Maximizing project´s Return on Investment
by Preventing Projects Delay, Cost Overrun and Revenue Losses
In an offshore wind project, the design, installation and maintenance of electrical cables are critical tasks. These components facilitate the transportation of power from the wind turbines to the shore.
SanCo´s Task | Description |
Design and Planning | Route Survey and Selection Engineering Design Thermal Analysis Risk Assessment and Mitigation |
Procurement and Logistics | Material Specification and Procurement Transportation and Storage Logistics Manufacturing and Quality Control |
Seabed Preparation | Clearance and Dredging Pre-Lay Grapnel Run (PLGR) Trenching and Excavation |
Installation | Cable Lay and Pipe Installation Cable and Pipe Burial Crossing Management Cable Pull-In to Turbines and Substations |
Termination and Testing | Cable Termination Jointing and Splicing Electrical Testing and Commissioning |
Protection and Stabilization | Cable Protection Systems Scour Protection Cable Marking and Monitoring Systems |
Environmental Compliance and Monitoring | Environmental Impact Monitoring Regulatory Reporting |
Operation and Maintenance (O&M) | Routine Inspection Condition Monitoring Cable and Pipe Repairs Periodic Burial Surveys |
End-of-Life Management and Decommissioning | Decommissioning Planning Removal and Recycling Site Restoration |
1.
Design and Planning
- Route Survey and Selection: Conduct detailed seabed surveys (geophysical and geotechnical) to identify the optimal cable and pipe routes, avoiding obstacles such as rock outcrops, shipwrecks, sensitive habitats, or other subsea infrastructure.
- Engineering Design: Develop engineering specifications for cables and pipes, considering environmental factors (e.g., water depth, currents) and structural load requirements. This includes choosing cable types, voltage levels, and insulation standards.
- Thermal Analysis: Conduct thermal modeling to ensure cables can operate within temperature limits, especially for high-voltage transmission lines, to prevent overheating.
- Risk Assessment and Mitigation: Assess risks such as cable damage from fishing or anchors and plan protective measures, including trenching depth or additional armor layers.
- Others
2.
Protection and Stabilization
- Cable Protection Systems: Install protective elements, such as rock dumping, concrete mattresses, or articulated pipe coverings, to shield cables from environmental risks like strong currents or seabed erosion.
- Scour Protection: Implement measures to protect against seabed erosion around cables and pipes, such as scour protection mats, especially around the foundation bases of turbines where currents are strong.
- Cable Marking and Monitoring Systems: Install markers or monitoring systems on key cable segments to assist with future inspection, maintenance, or repair.
- Others
3.
Operation and Maintenance (O&M)
- Routine Inspection: Perform regular inspections, including visual inspection with ROVs or divers, to check for signs of wear, damage, or environmental impact on cables and pipes.
- Condition Monitoring: Use electrical monitoring to detect any anomalies in current flow or resistance that may indicate degradation, joint faults, or insulation issues.
- Cable and Pipe Repairs: In the event of damage or wear, perform underwater repairs or replacements, which may involve raising sections of cable or pipe for repair on specialized vessels.
- Periodic Burial Surveys: Conduct surveys to ensure cables remain buried to the designated depth, re-burying exposed cables to prevent risks from fishing or anchoring.
- Others
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