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 />
I. <strong>Technology</strong> Background<br />
Status Emerging<br />
Date <strong>of</strong> Introduction Not available.<br />
Utilization Rates Not available.<br />
Vendor Name(s) Subline<br />
Subterra<br />
Daniels Contractors Ltd<br />
Lyncastle Way<br />
Appleton Thorn<br />
Warrington WA4 4ST<br />
UK<br />
Phone: +44 (0)1925 860666<br />
Email: info@subterra.co.uk<br />
Web: www.subterra.co.uk<br />
Practitioner(s) Consolidated Edison, Inc.<br />
Bronx and Manhattan<br />
1200 feet <strong>of</strong> 30 inches and 600 feet <strong>of</strong> 36 inches cast iron lined with Subline.<br />
Description <strong>of</strong> <strong>Main</strong><br />
Features<br />
760mm Subline had an SDR <strong>of</strong> 32.5 and the 910 mm Subline an SDR <strong>of</strong> 60.<br />
Subline is a close fit polyethylene lining. Pre-welded standard grade PE (PE80) is<br />
pushed through a <strong>for</strong>mer that folds it into a “C” shape that is temporarily<br />
maintained by restraining bands. After insertion, the liner is pressurized with<br />
water at ambient temperature breaking the temporary bands and reverting the pipe<br />
back to its original dimensions.<br />
<strong>Main</strong> Benefits Claimed • Negotiate bends up to 45 o<br />
• Designed to be a thin wall liner that bridges over holes and gaps preventing<br />
leakage<br />
• Stops internal corrosion<br />
• Minimal lost <strong>of</strong> cross-sectional area and there<strong>for</strong>e capacity<br />
<strong>Main</strong> Limitations Cited • Custom extruded PE with OD to match host pipe ID<br />
Applicability<br />
(Underline those that<br />
apply)<br />
• Proprietary couplings needed to join the liner up to the existing main<br />
<strong>Force</strong> <strong>Main</strong> Gravity Sewer Laterals Manholes Appurtenances<br />
Water <strong>Main</strong> Service Lines Other: Gas transmission and distribution<br />
II. <strong>Technology</strong> Parameters<br />
Service Application Water Supply and Distribution, Sewer Pumping <strong>Main</strong>s<br />
Service Connections Reinstate via excavation using proprietary fittings<br />
Structural Rating<br />
Claimed<br />
Semi-Structural (II)<br />
Materials <strong>of</strong><br />
Composition<br />
PE 80<br />
Diameter Range, inches 3-60 inches (75-1,600 mm)<br />
Thickness Range,<br />
inches<br />
0.12-0.80 inches (3-20 mm)<br />
Pressure Capacity, psi Depends on size <strong>of</strong> hole being bridged<br />
Temperature Range, o F 73 o F (pressure derating required at higher temperatures)<br />
Renewal Length, feet 3,500 feet (1,000 m) in one insertion<br />
Other Notes Include specific notes here such as water quality, I/I control, other<br />
Product Standards<br />
III. <strong>Technology</strong> Design, Installation, and QA/QC In<strong>for</strong>mation<br />
NSF 61 Certified (<strong>for</strong> potable water applications)<br />
Design Standards Not available.<br />
Design Life Range 50 years<br />
Installation Standards Not available.<br />
Installation<br />
PE pipe is custom extruded with OD matching ID <strong>of</strong> host pipe. The host pipe is<br />
Methodology<br />
cleaned, removing any internal corrosion or deposits. The integrity <strong>of</strong> the host<br />
pipe should be checked via CCTV. At site, the string <strong>of</strong> PE pipe is butt-fused<br />
together and then pushed through a <strong>for</strong>mer that folds the pipe into a “C” shape<br />
allowing it to be pulled through the host pipe. The pipe is temporarily strapped to<br />
A-18
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