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 ...
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
<strong>Technology</strong>/Method Fold and Form PE Close Fit Liner<br />
Renewal Length, feet 2,000+ feet depending on winching capacity.<br />
Other Notes Pipes may be cleaned, as needed, with high-pressure water jet cleaners,<br />
mechanically powered equipment, and winch cable attached devices or fluidpropelled<br />
pig devices.<br />
III. <strong>Technology</strong> Design, Installation, and QA/QC In<strong>for</strong>mation<br />
Product Standards HDPE is certified as complying with ANSI NSF Standard 61.<br />
Design Standards Class 4 design based on AWWA/PPI design standards. Class 3 interactive design<br />
based on industry accepted design methodology.<br />
Design Life Range 50 years<br />
Installation<br />
Methodology<br />
1. Excavations are required <strong>for</strong> installation and to remove any existing fittings.<br />
2. The PE pipe selected <strong>for</strong> the project is welded into lengths suitable <strong>for</strong><br />
installation; this can be the entire length, or shorter segments to accommodate<br />
available work space. If shorter segments are used, they will be fused together<br />
prior to entering the folding machine.<br />
3. The welded pipe is pushed through the folding machine, which alters the shape<br />
<strong>of</strong> the pipe, resulting in a diameter reduction <strong>of</strong> up to 40% <strong>of</strong> the cross-sectional<br />
area. The shape is maintained by banding the folded pipe.<br />
4. The liner is inserted into the host pipe.<br />
5. Once the liner is in place, it is cut to length, end fittings are attached and liner is<br />
pressurized to snap the bands.<br />
6. Intermediate fittings are installed, service connections are excavated and<br />
reconnected, and the completed line is pressure tested, disinfected and returned to<br />
service. Access points are backfilled and reinstated.<br />
QA/QC • Prior to installation <strong>of</strong> InsituGuard, CCTV inspection <strong>of</strong> the main is needed to<br />
locate any obstructions, protrusion, changes in diameter or in-line valves that<br />
could affect the InsituGuard.<br />
• After installation, InsituGuard is inspected again visually with CCTV, and<br />
any abnormalities are noted.<br />
• For the post-installation pressure test, InsituGuard is subjected to an internal<br />
pressure equal to twice the known operating pressure, or operating pressure<br />
plus 50 psi, whichever is less. After a stabilization period, the test period is<br />
one hour. Limit on make-up water to maintain pressure is 20 gallons per inch<br />
diameter per mile <strong>of</strong> pipe per day.<br />
IV. Operation and <strong>Main</strong>tenance Requirements<br />
O&M Needs Be<strong>for</strong>e returning the InsituGuard to service, <strong>for</strong> potable water, the system shall be<br />
Repair Requirements<br />
<strong>for</strong> Rehabilitated<br />
Sections<br />
disinfected in accordance with local standards.<br />
Excavate, remove the damaged portion <strong>of</strong> InsituGuard and host pipe (if<br />
necessary), install end couplers and bridge the previously damaged location with<br />
new pipe and couplers as required.<br />
V. Costs<br />
Key Cost Factors The most costly material is the pipe.<br />
Case Study Costs Not available<br />
VI. Data Sources<br />
References http://www.insitu<strong>for</strong>m.com/default.aspx<br />
A-21