CASE STUDY
Denso System Repairs Damaged Factory Coating
Buried Coatings
Project Data
| Location | HS2 – Euston Station, UK |
| Client | Thames Water / HS2 |
| Contractor | Barhale |
| Products | Denso Primer D™, Densoclad 70™, Denso™ Glass Outerwrap, Denso™ Clear Outerwrap |
| Date | June 2023 |
Project Details
A Denso™ Bitumen Tape Wrap System, comprising a bitumen-based primer (Denso Primer D™), a heavy-duty PVC-backed bitumen tape (Densoclad 70™), and a protective outerwrap (Denso™ Glass Outerwrap) was recently specified for the repair of a damaged epoxy polyurethane factory coating at the new HS2 terminus being constructed at London Euston train station.
Following the damage to the current coating, the harmful effects of the corrosion process had already begun to inflict damage upon the pipe and had propagated underneath the coating itself, causing it to delaminate. To eliminate any further damage, the Denso Bitumen Tape Wrap System was applied to provide not only protection from further corrosion damage, but a large degree of mechanical protection too.
Denso Glass Outerwrap (GOW) is a fiberglass cloth impregnated with a water activated resin that offers exceptional mechanical and impact strength for buried pipes exposed to aggressive backfill conditions. Once fully cured (after compression underneath a double layer of Denso™ Clear Outerwrap) the Denso GOW fully encapsulates the whole system with a long-term protective coating that is ready for immediate service.
The damaged factory coating is exposed.
The surface of the pipe is prepared ready for the Denso system application.
Denso Primer D™ is applied by brush to the pipe surface.
The completed primer application.
The Densoclad 70™ tape is wrapped circumferentially around the pipe.
The Densoclad 70™ tape is wrapped circumferentially around the pipe.
The PVC-backed bitumen tape is followed by Denso™ Glass Outerwrap.
To aid curing, the Denso™ Glass Outerwrap is compressed with Denso™ Clear Outerwrap.
The completed system application.
The damaged factory coating is exposed.
The surface of the pipe is prepared ready for the Denso system application.
Denso Primer D™ is applied by brush to the pipe surface.
The completed primer application.
The Densoclad 70™ tape is wrapped circumferentially around the pipe.
The Densoclad 70™ tape is wrapped circumferentially around the pipe.
The PVC-backed bitumen tape is followed by Denso™ Glass Outerwrap.
To aid curing, the Denso™ Glass Outerwrap is compressed with Denso™ Clear Outerwrap.
