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 Subline/Close Fit PE Liner – Fold -and - Form<br />
maintain the reduced shape through insertion. Insertion lengths <strong>of</strong> up to 3,500 feet<br />
are possible. The reduced cross-section PE pipe maintains its shape until<br />
subjected to internal water pressure. The internal pressure breaks the restraining<br />
straps and reverts the pipe back to its original diameter and in close contact with<br />
the host pipe. The string <strong>of</strong> PE pipes can be pulled through a bend <strong>of</strong> up to 45 o .<br />
Proprietary couplings are then attached to the end <strong>of</strong> the exposed pipe sections and<br />
make-up pieces are inserted to reconnect the pipe to the existing main.<br />
QA/QC CCTV the line, after cleaning, to make sure there are no impediments to prevent<br />
insertion and reversion <strong>of</strong> the PE liner. Pressure test after insertion.<br />
IV. Operation and <strong>Main</strong>tenance Requirements<br />
O&M Needs Not available.<br />
Repair Requirements Not available.<br />
<strong>for</strong> Rehabilitated<br />
Sections<br />
V. Costs<br />
Key Cost Factors Not available.<br />
Case Study Costs Not available.<br />
References<br />
VI. Data Sources<br />
www.subterra.co.uk, Subline flyer<br />
A-19