CASE STUDY
DENSO PROTECTS NSC 2.2 PIPELINE
Buried Pipeline Coatings
Project Data
| Location | Botswana: Pipeline from Gaborone to Palapye |
| Products | Denso™ ST 100, Protal 7200™, CPT 1000 Tape™, Densotherm HD, Denso™ Butyl Profiling Mastic |
| Date | January 2023-March 2024 |
PROJECT DETAILS
The North-South Carrier (NSC) is a pipeline in Botswana that carries raw water south for a total distance of 360 kilometers (220 mi) to the capital city of Gaborone.
Phase 1 was completed in 2000, of which Denso also supplied the corrosion prevention, and Phase 2 of the NSC is currently under construction and is due to be completed in June 2024. This project required a suitable, cost-effective, easy-to-apply corrosion prevention solution that could withstand the harsh African climate and, with the success from the previous pipeline projects in Botswana, and our relationships with the contractors, Denso were the supplier of choice.
The NSC 2.2 included the internal and external protection of 13 500 welded field joints, air valves, scour valves and bends.
Pipe length: NSC 2.2-253km
Pipe diameter: 1200mmØ
Internal protection:
Denso™ ST 100 applied at 500 microns min DFT
External protection – Liquid Field Joint Coating System consisting of:
Protal 7200™ applied at 600 microns DFT, Denso Primer D™, Denso CPT 1000 Tape™ Innerwrap and Denso CPT 1000 Tape™ Outerwrap applied with a 55% tape overlap.
Completed field joint wrapped with our Denso™ Liquid Field Joint Coating system.
Side booms lowering the 1200mmØ pipe.
Excavator backfilling once the pipeline has been installed and inspected for any damages.
Completed field joint wrapped with our Denso™ Liquid Field Joint Coating system.
Side booms lowering the 1200mmØ pipe.
