Page 119 - Trenchless Technology Piping Installation and Inspection

Existing Pipeline Renewal and Replacement Methods 85

3.1.6 The owner authorizes the use of proven materials
that serve to enhance the pipe performance specified
herein. Proven materials have passed independent
laboratory testing, not excluding long-term (10,000
hours) structural behavior testing, and have been
successfully installed to repair failing existing pipes
in the United States for at least 4 years.
Documentation for products and installers seeking
preapproved status must be submitted no less than
2 weeks prior to proposal due date to allow time for
adequate consideration. The owner will advise of
acceptance or rejection a minimum of three days prior
to the due date. All required submittals must be satis-
factory to the owner.
4. Materials
4.1 Tube—The sewn tube shall consist of one or more layers of
absorbent nonwoven felt fabric and meet the requirements
of ASTM F1216-09, Sec. 5.1 or ASTM F1743-08, Sec. 5.2.1 or
ASTM D 5813-04, Secs. 5 and 6. The tube shall be con-
structed to withstand installation pressures, have sufficient
strength to bridge missing pipe, and stretch to fit irregular
pipe sections.
4.1.1 The wet out tube shall have a relatively uniform
thickness that when compressed at installation pres-
sures will equal or exceed the calculated minimum
design CIPP wall thickness.
4.1.2 The tube shall be manufactured to a size that when
installed will tightly fit the internal circumference and
length of the original pipe. Allowance should be made
for circumferential stretching during installation.
4.1.3 The outside layer of the tube shall be coated with an
impermeable, flexible membrane that will contain
the resin and allow the resin impregnation (wet out)
procedure to be monitored.
4.1.4 The tube shall contain no intermediate or encapsu-
lated elastomeric layers. No material shall be
included in the tube that may cause delamination in
the cured CIPP. No dry or unsaturated layers shall be
evident.
4.1.5 The wall color of the interior pipe surface of CIPP
after installation shall be a relatively light reflective
color so that a clear detailed examination with closed
circuit television inspection equipment may be
made.
4.1.6 Seams in the tube shall be stronger than the non-
seamed felt material.