State of Technology Report for Force Main Rehabilitation, Final ...

Technology/Method CIPP/Pull In Place or Inversion
pulled in place liner and becomes part of the finished liner. The removable
bladder, a thermoplastic membrane, is used in short laterals and point repairs,
where it is preferred to not cut the ends of the installed CIPP liner.
The properties of the Inliner CIPP product are listed below depending on the
type of resin used:
Isophthalic Enhanced
Flexural Modulus, psi 250,000-380,000 400,000-450,000
Flexural Strength, psi 4,500-6,600 4,500-7,000
Tensile Modulus, psi 290,000-360,000 290,000-400,000
Tensile Strength, psi 3,000-6,000 3,000-5,000
Tensile Elongation, % 1-3 2-4
Diameter Range,
inches
4-120 inches
Thickness Range,
inches
0.12–2.4 inches (3-60mm)
Pressure Capacity, psi Recommended < 60 psi operating pressure
Temperature Range,
o
F
Recommended for 140 o F or less
Renewal Length, feet Lengths from 5 feet to 2400 feet have been installed
Other Notes Inliner is not NSF 61 listed so not appropriate for potable water.
Product Standards
III. Technology Design, Installation, and QA/QC Information
ASTM D5813
Design Standards ASTM F1216, Appendix XI (Design Considerations)
Design Life Range 50 year design life
Installation Standards ASTM F1216 for inversion, ASTM F1743 for pull in place
Installation
Methodology
The CIPP tube is inserted by either inversion using water or air, or pulled into
place. For inversion the tube is inflated by either water or air pressure. If using
the pull in place method, a calibration hose or removable bladder is inverted
inside the felt tube after the tube is pulled in to position. Curing is by either hot
water or hot air (steam) in either case.
QA/QC Prior to lining, the line should be cleaned and CCTV used to locate laterals,
connections, offsets, diameter transitions, etc. After lining, CCTV is used again
to locate any anomalies or defects (bulges, wrinkles, etc.) in the liner. Either
restrained samples, or specially made flat plate samples, using the same resin and
felt fabric, are made and tested for conformance to minimum flexural properties.
IV. Operation and Maintenance Requirements
O&M Needs Standard CCTV inspection and water cleaning
Repair Requirements
for Rehabilitated
Sections
CIPP Short Sectional point repairs readily available from several contracting
firms
V. Costs
Key Cost Factors Mobilization affects cost when contract contains minimal segments of CIPP
lining. Generally speaking, a project of 3,000 linear feet or more will offset any
effect of mobilization on cost. Diversion or by-pass pumping requirements can
have a significant impact on cost. For materials, recent fluctuations in the cost of
the resin and fuel have impacted costs of the installed CIPP
Case Study Costs Not available.
VI. Data Sources
References Inliner Design Guide (March 2008), Inliner Technical Brochure (no date)
A-33