Page 318 - Trenchless Technology Piping Installation and Inspection
P. 318

Defect Score   (points/ft)  Less than 10  10–25  25–65  More than 65





























                  Action Required  No repairs • Future routine inspection  No immediate repairs Possible preventive measures such as chemical addition,   • other treatment, or maintenance to stabilize existing condition Schedule next inspection in the order of pipeline system priority  •  Routine repairs Includes planning, env
















                  Condition Description  Very good Condition is almost like new pipeline   pipe  Good to fair condition  • Light cracks localized • Light corrosion localized  • Light roots localized  Fair to poor condition • Moderate cracks/fractures • Moderate corrosion continuous • Moderate infiltration continuous • Moderate










                  Category  A  •  B          C            D         TABLE 7.4





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