5. This will be accomplished using a computer and data base that are tamper proof.
During the curing process, infrared sensors will be used to record curing data that will
be submitted to the Engineer with a post CCTV inspection on DVD.
The parameters for curing speed, inner air pressure and wattage are defined in the
Quality Tracker UV curing protocol issued by the manufacturer. The optimal curing
speed, or travel speed of the energized UV light sources, is determined for each
length of liner based or liner diameter, liner thickness, and exothermic reaction
temperature.
6. Flushing of the cured fiberglass/UV cured CIPP liner (to reduce styrene residual) is
not required for fiberglass/UV cured CIPP products that provide 3™ party test results
that document styrene residual levels (without flushing) within acceptable defined
levels.
3.06 SEALING AT MANHOLES
The cured-in-place CIPP shall make a tight seal at the manhole wall opening with no
annular gaps. Under all circumstances, the liner shall be sealed to the manhole and host
pipe with a resin mixture compatible with the liner/resin system, and applied in
accordance with the manufacturer’s specifications.
3.07 REINSTATEMENT OF SERVICES
1. All live services shall be reinstated as soon as practical after rehabilitation,
testing, and cooling of sewer lines. Inactive services may be left unopened as
directed by the Engineer. It is the Contractor’s responsibility to document all
live services prior to lining. Each service connection shall be noted by its
size, position from a reference manhole, and orientation with respect to the
circumference of the pipe. Reconnection shall be accomplished from the
interior of the sewer line by means of a television camera and a remote
controlled cutting device. Excavation to activate existing sewer services shall
not be allowed.
2. Holes cut through the rehabilitation liner shall be done in a two-step process.
The holes shall be first cut open with a router bit or deburring tool, and then
brushed with a wire brush to a neat and smooth surface. Holes shall reopen
service lines to a minimum of ninety (90%) percent of the service lateral. A
one-step process that accomplishes the same effect may be used if approved
by the Engineer.
2019 CIPP Lining Project CIPP Lining of Existing Sewers (Ultraviolet)
Nashua, NH 02651-11
