Page 353 - Trenchless Technology Piping Installation and Inspection

Monetary Penalties N/A N/A N/A N/A N/A

Repair Types Short liner (patch repair) installed over dry area. be Holes can repaired with epoxy as recommended by the manufacturer Short liner installed over the hole. If leaking, install a short liner over the loose vacuum patch. A short liner repair is installed over the cracked a

Requirements Dry liner section needs to be The hole needs to be repaired. Should be repaired Should be repaired

Repair removed. if leaking. N/A if leaking.

Accepted Tolerance Dry liner sections are not acceptable. Holes in the liner are not acceptable. No action required unless pipe is leaking. N/A No action required unless pipe is leaking.

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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