CASE STUDY
REHABILITATION OF EXISTING 28” DIA. CS WATER PIPELINE – DIAM PIPELINE, OMAN
Buried Coatings
Project Data
| Location | Sohar, Oman |
| Client | DIAM (Public Authority for Water) |
| Contractor | Galfar Engineering & Contracting SAOG |
| Distributor | Bin Moosa Trading & Contracting LLC |
| Products | Denso Paste™, Densyl™ Tape, Denso™ PVC Self-Adhesive Tape |
| Date | January 2023 |
Project Details
DIAM’s (Public Authority for Water) aim is to ensure the provision of high quality, sustainable and reliable potable water services to all people in the Sultanate of Oman. Diam’s Mission: Working towards establishing water transmissions and distribution networks and applying systems to manage them with high efficiency.
This is the second Diam pipe repair and rehabilitation of the existing 3LPE coating but this time with a different contractor. The pipeline runs adjacent to the sea, below sea level, therefore is in constant contact with highly (saline) salty water. Since the pipeline carries water under high pressure (25 bar) and considering its age, condition and difficult to reach location, the end user wanted a solution that would offer long-term protection without having to abrasive clean the substrate.
The Denso™ Petrolatum Tape System was selected because of its ability to perform under challenging conditions being that it is an extremely surface tolerant system.
The Densyl™ Tape was applied spirally with a 55% overlap creating a consistent double layer of protection across the section. The 200 micron Denso™ PVC Self-Adhesive Tape was then applied similarly with a 55% overlap however this was completed twice over ensuring a robust 4 layer outer protection.
Denso Paste applied as the first layer of protection to the surface after minimal surface preparation.
Application of the Densyl Tape to the pipe.
Denso PVC Self-Adhesive tape being applied to provide an outer layer of mechanical protection.
The completed Denso Petrolatum Tape System.
The buried pipe in-situ.
Denso Paste applied as the first layer of protection to the surface after minimal surface preparation.
Application of the Densyl Tape to the pipe.
Denso PVC Self-Adhesive tape being applied to provide an outer layer of mechanical protection.
The completed Denso Petrolatum Tape System.
