Scope
The repairs had the following specifications:
| Design Pressure | 4,140kPa |
| Outer Diameter | 80mm |
| Structure | Lean Oil Make-Up Line |
| Surface Preparation | Sa2.5 |
| Installation | No Hot Work |
| Class Approval | N/A |
| Design Temperature | 65 °C |
| Design Life | 5 years |
| Loads | Crush load at pipe support considered in the design |
| Geometory | Straight |
| Corrosion Type | External corrosion at pipe support |
| Defect Details | 400mm x 100mm Designed for full section loss over 600mm through wall |
Overview
A rapid turn around with no shut down repair was required on a gas plant 80NB line. At the pipe support corrosion had occurred and an immediate repair was required that would provide a permanent repair solution.
In this case the operator required a 5 year design with Technowrap™ over external corrosion including an existing welded patch plate repair .
Solution
- Heat tapes were used for rapid control of cure, reducing down time
- Site crew able to provide surface preparation and Technowrap™ repair
- Full section loss design, no steel allowance for loads of leak sealing over 600mm section
- Stops any further external corrosion
Benefits
- Low cost and rapid scope delivery
- No hot work.
- Full leak sealing, pressure containment and load carrying capacity
- Technowrap™ repairs are able to be monitored and inspected over the life of the repair, often the repair life can be extended based on desktop engineering
Project Images
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