Scope
The line had the following specifications:
| Structure | Oil Supply 8" Line |
| Surface Preparation | Sa2.5 |
| Class Approval | N/A |
| Substrate Material | Carbon Steel |
| Design Pressure | 60 bar |
| Design Temperature | 60 °C |
| Application Temperature | 30 °C - 40°C |
| Design Life | 10 years |
| Wrap Length | 3.8 meters |
| Geometory | Wrap over previous repair |
| Corrosion Type | Internal |
| Defect Details | Modelled as max 15x15mm hole |
Overview
The client contacted ICR.IAS JV about significant internal corrosion defects on the underground oil supply pipeline. The repair strategy and landing were also designed to include a previous non-Technowrap™ composite repair. ICR.IAS JV applied a 14-layer Technowrap™ 2k Glass Fibre repair to numerous defect locations along the buried pipe.
Solution
- Technowrap™ 2k Glass Fibre with HA (High Ambient) Resin system was chosen due to the design temperatures and location requirements.
- Wrapping over the existing non-Technowrap™ repair was necessary due to the location of the defects on the pipeline.
- Challenging working environment with ambient temperatures exceeding 400C causing shorter working times with resin. This was mitigated with improved work setup to suit faster application.
Benefits
- Repairs completed online with no line shutdown necessary.
- Higher temperatures assisted with curing.
- Custom work area set up enabled Technicians to efficiently perform application.
- Technowrap™ as a long term solution for internal corrosion defects on the buried oil supply pipe.
Project Images
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