All wet-out or impregnation of the Tube must be done in an EPA-
regulated, quality-controlled facility. Documentation of EPA permitting
must be submitted with all qualified bids. No “over the hole” or “on-site”
wet-out is allowed. For products that are cured with hot water, the wet-out
must be conducted within 300 miles of the job site considering the time-
sensitive characteristics of thermal-cured products.
FIBERGLASS TUBE
The glass fiber tubing shall be seamless and spirally wound, including an
exterior and interior film that protects and contains the resin used in the
liner. The exterior film will be provided with a UV light blocker foil.
The Tube shall consist of a seamless, spirally wound glass fiber that is
flexible and has strain values (expandable) of equal to eight (8) percent.
The tube will not have a longitudinal seam, including a stitched seam,
stitch-free-weld or bond, or stitch-free overlap. The tube shall be
constructed to withstand installation pressures and have sufficient strength
to bridge missing pipe.
The impregnated Tube shall have a uniform thickness, that when
compressed at installation pressures, will meet or exceed the Design
thickness. If voids are present in the pipe, the Design wall thickness must
still be met or exceeded.
The Tube shall be sized such that when installed, it will tightly fit the
internal circumference and length of the original pipe.
The glass fiber Tube shall be saturated with the appropriate resin using a
resin bath to allow for the lowest possible amount of air entrapment.
Vacuum-suction impregnation methods are not allowed due to the
introduction of air using this method. The liner will then be formed into a
spirally wound shape for the purpose of being seamless in its cured state.
An inner and outer material will be added that are both impervious to
airborne styrene, with the outer materials also having UV blocking
characteristics. The inner membrane will be removed after the installation
and curing processes are completed.
The wall color of the interior pipe surface of CIPP after installation shall
be a light reflective color so that a clear detailed examination with closed
circuit television inspection equipment may made.
The liner should be seamless in its cured state to insure homogenous
physical properties around the circumference of the cured liner.
2019 CIPP Lining Project CIPP Lining of Existing Sewers (Ultraviolet)
Nashua, NH
02651-8
