Page 352 - Trenchless Technology Piping Installation and Inspection
P. 352
Monetary
Repair
Accepted Tolerance Penalties Repair Types Requirements N/A Short liner (patch Dry liner section Dry liner sections repair) installed over needs to be are not acceptable. dry area. removed. N/A be Holes can The hole needs to Holes in the liner repaired with epoxy be repaired. are not acceptable. a
Probable Cause Liner not properly wet-out before installation. Pilot hole cut in liner or other defect. Patch not properly bonded to the liner after vacuum line is removed. Shrinkage cracks may occur in smooth pipe where there is little or no locking between the existing pipe and the CIPP. B
Defects Dry tube or white spots Hole in the liner Loose or peeling vacuum patches Crack in the liner Defective and leaking bung holes
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