Scope
The line had the following specifications:
| Structure | Dual Nozzle |
| Surface Preparation | Sa2.5 |
| Class Approval | N/A |
| Design Pressure | 19.6 bar |
| Design Temperature | -5 to 90 °C |
| Application Temperature | 30 °C |
| Design Life | 20 years |
| Wrap Length | 470mm |
| Pipe Diameter | 2" and 4" |
| Geometory | Wrap over flange |
| Corrosion Type | External |
| Defect Details | 50mm axial, full circumferential (wall thinning) |
Overview
An instrumentation spool located on an Ammonia Storage Tank had severe wall thinning on both outlets of a flange. A unique layup method had to be devised to ensure that both defects could fall under a Technowrap™ engineered composite design.
Solution
- Technowrap 2K™ HA system with temperature resistance up to 90°C
- Flexible and rapid response providing an engineered composite solution
- Innovative layup procedure to account for the separated landing zones
Benefits
- No hot work and avoided the need for shutdown
- The composite design was a long term solution to repair the corrosion
- Repair completed in a difficult area with minimal additional safety requirements
Project Images
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