Page 124 - Trenchless Technology Piping Installation and Inspection

90 Cha pte r T w o

8.1.1 Resin impregnation—The quantity of resin used for
tube impregnation shall be sufficient to fill the vol-
ume of air voids in the tube with additional allow-
ances for polymerization shrinkage and the potential
loss of resin during installation through cracks and
irregularities in the original pipe wall, as applicable.
8.1.2 Tube insertion—The wet out tube shall be positioned
in the pipeline using either inversion or a pull-in
method as defined within relevant ASTM standards
previously stipulated. If pulled into place, a power
winch or its equivalent should be utilized and care
should be exercised not to damage the tube as a result
of pull-in friction. The tube should be pulled-in or
inverted through an existing manhole or approved
access point and fully extend to the next designated
manhole or termination point.
8.1.3 Temperature gauges shall be placed between the tube
and the existing pipe’s invert position to monitor the
temperatures during the cure cycle.
8.1.4 Curing shall be accomplished by utilizing hot water
under hydrostatic pressure or steam pressure in
accordance with the manufacturer’s recommended
cure schedule.
9. Reinstatement of branch connections
9.1 It is the intent of these specifications that branch connections
to buildings be reopened without excavation, utilizing a
remotely controlled cutting device, monitored by a CCTV.
The contractor shall certify a minimum of two complete func-
tional cutters plus key spare components are on the job site
before each installation or are in the immediate area of the
jobsite and can be quickly obtained. Unless otherwise directed
by the owner or his authorized representative, all laterals will
be reinstated. No additional payment will be made for exca-
vations for the purpose of reopening connections and the
contractor will be responsible for all costs and liability associ-
ated with such excavation and restoration work.
10. Inspection
10.1 CIPP samples shall be prepared for each installation desig-
nated by the owner/engineer in accordance with ASTM
F1216-09, Sec. 8.1. Pipe physical properties will be tested in
accordance with ASTM F1216-09 or ASTM F1743-08, Sec. 8.
The flexural properties must meet or exceed the values
listed in the Table 2.7∗ of this specification, Table 1 of ASTM

∗Please see “Table 2.7. Minimum CIPP Cured Polyester Composite Physical
Properties”