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 Fold -and - Form/Therm<strong>of</strong>ormed<br />
• Relatively small job site footprint. Most equipment can be parked away<br />
<strong>Main</strong> Limitations<br />
Cited<br />
Applicability<br />
(Underline those that<br />
apply)<br />
from the insertion access if necessary.<br />
• Materials are NSF 61 approved, but system has yet to be listed <strong>for</strong> use in<br />
potable water lines; listing is planned to be pursued in the future.<br />
• Limited long-term pressure test data to support independent use as a fully<br />
structural liner in pressure applications; available data supplemented by 10<br />
years <strong>of</strong> practical field application.<br />
• Requires access at both ends <strong>of</strong> the pipe <strong>for</strong> installation.<br />
• Requires excavation <strong>for</strong> a pressure seal at branch connections.<br />
• All tight-fitting liners require additional technologies (grout packing, lateral<br />
lining, or other) to provide a seal at internal branch connections.<br />
• Elevated temperatures lower the modulus <strong>of</strong> thermoplastics like PVC alloys,<br />
thus modulus adjustments should be considered within the structural<br />
equations when the application is significantly above routine wastewater<br />
flow temperatures.<br />
• Construction network is small scale which limits available economies <strong>of</strong><br />
scale and influences potential competitiveness on larger scale projects<br />
(particularly 30,000 linear feet +).<br />
• Not currently available in most major metros. This is subject to change with<br />
coverage expansion.<br />
<strong>Force</strong> <strong>Main</strong> Gravity Sewer Laterals Manholes Appurtenances<br />
Water <strong>Main</strong> Service Lines Other: Culverts, Industrial, Water Intake<br />
II. <strong>Technology</strong> Parameters<br />
Service Application Wastewater, storm water, raw water, industrial, power<br />
Service Connections Laterals remotely reinstated with robots. Down time 5 hours plus time to<br />
Structural Rating<br />
Claimed<br />
reinstate laterals. Sewer main flow typically disrupted <strong>for</strong> 3 to 4 hours.<br />
Fully structural, independent liner. Flexural modulus available as 145,000 psi<br />
(F1871) or 280,000 psi (F1504), and flexural strength as 4,100 psi (F1871) or<br />
5,000 psi (F1504). Design is determined by industry standard equations with<br />
material properties adjusted <strong>for</strong> long-term per<strong>for</strong>mance under load.<br />
Virgin PVC alloy compound (impact modified, no fillers, NSF approved)<br />
Materials <strong>of</strong><br />
Composition<br />
Diameter Range, 4 to 30 inches – F1504 only to 16 inches<br />
inches<br />
Thickness Range, 4 inches – DR 32.5, 6, 8, 9 inches – DR 32.5 to 35, 10, 12, 15, 16 inches – DR<br />
inches<br />
32.5 to 41, 18 inches – DR 35 to 50, 21, 24, 30 inches – generally designated by<br />
wall thickness up to 0.65 inches<br />
Pressure Capacity, psi Currently available <strong>for</strong> low pressure, under 80 psi (only available up to 15 inches<br />
diameter pipe). Design methodologies are still being researched, with no<br />
available standards. Have completed one “experimental” 150 psi project.<br />
Temperature Range, o F 100 o F (continuous) <strong>for</strong> F1871; 120 o F <strong>for</strong> F1504; intermittent and diluted flows at<br />
higher temps may be acceptable. Under sustained elevated temperatures, the<br />
design modulus needs to be adjusted <strong>for</strong> structural calculations.<br />
Renewal Length, feet Up to 600 feet typical; 1,000 feet <strong>for</strong> 8 to 12 inches has been achieved, and up to<br />
650 feet <strong>for</strong> 21 inches and 24 inches, up to 500 feet <strong>for</strong> 30 inches<br />
Other Notes Minimal to no loss <strong>of</strong> flow capacity expected; flow velocity increases can be<br />
significant. No noxious or toxic chemicals (NSF potable water and FDA food<br />
contact safe materials). Safe <strong>for</strong> use in environmentally sensitive applications.<br />
Has evidenced comparable I/I control to competitive alternatives in field<br />
applications.<br />
III. <strong>Technology</strong> Design, Installation, and QA/QC In<strong>for</strong>mation<br />
Product Standards ASTM F-1871 Standard Specification <strong>for</strong> Folded/Formed Poly (Vinyl Chloride)<br />
Pipe Type A <strong>for</strong> Existing Sewer and Conduit <strong>Rehabilitation</strong><br />
ASTM F-1504 Standard Specification <strong>for</strong> Folded Poly (Vinyl Chloride) (PVC)<br />
Pipe <strong>for</strong> Existing Sewer and Conduit <strong>Rehabilitation</strong><br />
Design Standards Appendix within ASTM installation standard F1867 and F1947 is the same as<br />
that within ASTM F1216 <strong>for</strong> CIPP products.<br />
A-23