Water & Wastewater
Cooling Tower Basins
The cooling basins used in this refinery were attacked by chemicals: bleach and anti-corrosion agents which are usual additives for industrial cooling waters.
The concrete was prepared by sand blasting, Belzona 4111 with Belzona 4151 was used to repair and resurface the cracks then the basins were coated with 5811 for chemical protection.
Belzona 4111, Belzona 4151, Belzona 5811
The rubber cladding on the exterior of the drive roller had failed and delaminated.
Belzona 1321 was applied using a stiff bristle brush and the aggregate was then sprinkled onto the wet coating to blind the surface. The aggregate was then tamped in and the application was left to cure. The application was undertaken over the weekend to allow the lorry to be back up and running and on the road on Monday morning. The ease of application and curing time of Belzona 1321 allowed the application to be completed within the required time frame.
Years of pumping salty river water eroded this discharge pipe which feeds an irrigation ditch. The severe reduction in wall thickness resulted in numerous failures. The pipe was too thin to weld, and being roughly 30″ in diameter, a repair was more conducive to the exposed exterior than on the inside.
The pipe was already riddled with large through-wall defects, and after abrasive blasting the pipe, numerous small holes developed. These small holes were repaired with Belzona 1111 reinforced with Belzona 9341. The larger holes were repaired using a plate cold bonding technique. The adhesive used was Belzona 1121 due to its extended working life. A two-wrap traditional composite system, consisting of Belzona 5811 reinforced with Belzona 9331, was applied. A third coat was used to fully encapsulate the reinforcement sheet. A final paint was used to prevent UV degradation.
Belzona 1121, Belzona 1111, Belzona 5811, Belzona 9341, Belzona 9331