Page 120 - Trenchless Technology Piping Installation and Inspection

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4.1.7 The tube shall be marked for distance at regular inter-
vals along its entire length, not to exceed 5 ft. Such
markings shall include the manufacturers name or
identifying symbol. The tubes must be manufactured
in the United States.
4.2 Resin—The resin system shall be a corrosion resistant poly-
ester or vinyl ester system including all required catalysts,
initiators that when cured within the tube create a compos-
ite that satisfies the requirements of ASTM F1216-09, and
ASTM F1743-08, the physical properties herein, and those
which are to be utilized in the submitted and approved
design of the CIPP for this project. The resin shall produce
a CIPP that will comply with the structural and chemical
resistance requirements of this specification.

5. Structural requirements
5.1 The CIPP shall be designed as per ASTM F1216-09, App. X1.
The CIPP design shall assume no bonding to the original
pipe wall.
5.2 The contractor must have performed long-term testing for
flexural creep of the CIPP pipe material installed by his
company. Such testing results are to be used to determine
the long-term, time dependent flexural modulus to be uti-
lized in the product design. This is a performance test of the
materials (tube and resin) as defined within the relevant
ASTM standard. A percentage of the instantaneous flexural
modulus value (as measured by ASTM D790-07 testing)
will be used in design calculations for external buckling.
The percentage, or the long-term creep retention value uti-
lized, will be verified by this testing. Retention values
exceeding 50 percent of the short-term test results shall not
be applied unless substantiated by qualified third party test
data to the owner’s satisfaction. The materials utilized for
the contracted project shall be of a quality equal to or better
than the materials used in the long-term test with respect to
the initial flexural modulus used in the CIPP design.
5.3 The enhancement factor “K” to be used in “Partially Dete-
riorated” design conditions shall be assigned a value of
seven.
5.4 The layers of the cured CIPP shall be uniformly bonded.
It shall not be possible to separate any two layers with a
probe or point of a knife blade so that the layers separate
cleanly or the probe or knife blade moves freely between
the layers. If the layers separate during field sample
testing, new samples will be required to be obtained
from the installed pipe. Any reoccurrence may cause
rejection of the work.