Page 350 - Trenchless Technology Piping Installation and Inspection

Pipe should have no N/A The area where the Should be repaired existing liner has if leaking. visible leakage. pinholes should be patched with a short-liner repair. N/A As recommended by All of the soft areas A soft liner is the manufacturer. need to be cut out. not acceptable and needs to be rehe

Defects in the coating caused during manufacture and/or installation. Liner may have been punctured during delivery and installation into the existing pipe. When pulling the robotic cutter through the lined pipe, if the cutter bit is extended, damage to the liner coating may occur. Cold spot

1. 2. 3. 1. 2. 3.

Pinholes, cuts, and leaks through coating Soft spot in liner TABLE 7.10

303