CASE STUDY
Internal and External Denso Protection for Water Pipes in
Fiji Nadarivatu Renewable Energy Project (Sinohydro)
Buried Coatings
Project Data
| Location | Fiji |
| Products | Denso ST™ Epoxy, Denso Primer D™ and Densopol 80 HT™ Tape |
| Date | July 2012 |
Project Details
Picturesque Fiji blessed with 332 magnificent islands, most with beautiful sandy white beaches, swaying coconut trees and pristine oceans is the scene for one of Denso Australia’s projects.
Far from the white sandy beaches in the green lush highlands, the Fijian government built a hydroelectricity station for which Denso provided products. External and internal coating products were supplied to protect the 1.6km (made up of 2250mm. & 1600mm.) freshwater pipe.
The pipe was grit blasted to Sa2. (with a blast profile of 50 – 70μm) externally and internally, the internals having a minimum blast profile of 65μm which was strictly adhered to. The first application was to stripe coat all weld seams using light grey Denso ST™ Epoxy (which has Potable Water Approval to AS/NZ 4020). This was followed by a full coat of the ST Epoxy at DFT of 250μm and allowed to cure. The second application was another stripe coat to all the weld seams and then a further full coat of the ST Epoxy in white at a minimum of 250μm DFT, achieving a total DFT of 500 – 600μm. The external of the pipe was then coated with Denso Primer D™ that was roller applied to a 50μm DFT then wrapped with Densopol 80HT™ Tape with a 55% overlap.
External surfaces of the pipe were wrapped with Densopol 80HT™ Tape
The new hydroelectricity station under construction
Internal surfaces of the water pipes were coated with Denso ST™ Epoxy
External surfaces of the pipe were wrapped with Densopol 80HT™ Tape
External surfaces of the pipe were wrapped with Densopol 80HT™ Tape
The new hydroelectricity station under construction
Internal surfaces of the water pipes were coated with Denso ST™ Epoxy
