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