Page 346 - Trenchless Technology Piping Installation and Inspection

The wrinkle is No deduction, Removal of wrinkles The wrinkle should assuming adequate (fins) and coat area be cut out if it acceptable if it thickness is with approved epoxy impedes the flow. does not disrupt achieved. material. Trim to or impede the within 1/4 in. of normal flow pipe wall surfac

Low head during inversion. Pipe undersized due to deterioration in local area. Inadequate bond between the fabric and the coating during manufacture. Premature pressure loss during installation. Insufficient cure time calculated. Addressing Potential CIPP Defects

1. 2. 1. 2.
Wrinkles (fins)— circumferential Blisters/ bubbles Lifts in liner TABLE 7.10

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