The Problem
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 Solution
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.
Products Applied
Belzona 1121, Belzona 1111, Belzona 5811, Belzona 9341, Belzona 9331