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Produced Water Repair Over Clamp on FPSO
Overview
Internal corrosion had caused a through wall defect to a produced water line. The defect had been temporarily repaired with a Plidco Smith type clamp, however the Client required a repair with a 10 year design life extension and ABS class approval.
TechnowrapTM is the only composite repair class approved by ABS and Lloyds.
Scope
The line had the following specifications:
| Structure | Water Line |
| Surface Preparation | Sa 2.5 |
| Class Approval | ABS |
| Design Pressure | 1,650 kPa |
| Design Temperature | 800C |
| Application Temperature | 500C |
| Design Life | 10 years |
| Wrap Length | 1.15 m |
| Pipe Diameter | 324 mm |
| Geometry | Wrap over clamp and T |
| Corrosion Type | Internal |
| Defect Details | (e.g. 65mm circumferential (through wall) |
Solution
- Technowrap 2KTM HA system with temperature resistance up to 90°C
- Wrap installed over existing temporary clamp
- Designed to accommodate significant internal corrosion over the life of the repair
- Detailed QA/QC procedures captured repair details for future reference
Benefits
- Repair completed on a live line without the need for a shut-down or any production loss
- No hot works required
- Flexibility in TechnowrapTM technology allowed for complicated geometries to be repaired, such as a clamp and tee shaped pipework
- QA/QC processes ensured high quality wrap to be installed and documented
