State of Technology Report for Force Main Rehabilitation, Final ...

Technology/Method Saertex - Liner® /CIPP
Applicability
(Underline those that
apply)
Force Main (potential) Gravity Sewer Laterals Manholes Appurtenances
Water Main Service Lines Other: Storm Water Pipes
II. Technology Parameters
Service Application Gravity sewer, storm water pipes
Service Connections Service connections reinstated same as conventional CIPP liners.
Structural Rating Semi structural to fully structural. The Saertex-S-Liner and Saertex-M-Liner have
Claimed
the following short-term flexural properties:
Saertex-S Saertex-M
Flexural Strength, psi 36,250 29,000
Flexural Modulus, psi 1.740 x 10 6
1.015 x 10 6
Materials of
The S-Liner has a diminution factor of 1.35 for calculating the long-term flexural
modulus.
Advantex® (ECR glass) glass fiber from Owens Corning. Polyester resin from
Composition DSM and Scott Bader. Vinylester resin from NRC.
Diameter Range,
inches
6 to 48 inches (150 to 1,200 mm)
Thickness Range,
inches
0.118 to 0.472 inches (3 to 12 mm)
Pressure Capacity,
psi
Not available.
Temperature Range,
o
F
Not available.
Renewal Length, feet Hose liners up to 1,640 feet (500 m)
Other Notes Not available.
III. Technology Design, Installation, and QA/QC Information
Product Standards EN 13566, Part 4
Design Standards ATV-M 127, Part 2, NSF 14
Design Life Range 70 years based on 20,000 hour stress rupture testing
Installation Standards DIN EN 1610
Installation
Sewer lines need to be cleaned and TV-inspected before start of work. A sliding
Methodology film is inserted along the invert and packing heads installed at the ends of the
liner. The liner is drawn into the existing pipe and then inflated using compressed
air. The liner is then cured with either UV light or steam, depending on resin
type. The curing process is computer-controlled. After curing the packing heads
are removed and the inner film removed, tightness testing can be made at this
point. A pproximately 4 hours after curing, laterals or service connections can be
reinstated using conventional methods and the line returned to service.
QA/QC Host pipe is CCTV inspected prior to lining. After lining, another CCTV
inspection is necessary to confirm that there are no wrinkles, delamination or
foreign objects (defects) in the liner. Samples, per ASTM F1743 should be
obtained and tested for wall thickness, flexural and tensile properties. Exfiltration
tests for gravity pipes, with a maximum limit of 50 gal/inch diameter/mile/day,
and pressure testing to either twice the working pressure or working pressure plus
50 psi, whichever is less, is recommended in ASTM F1743. Allowable leakage
for pressure test is 20 gal/inch diameter/mile/day.
IV. Operation and Maintenance Requirements
O&M Needs Not available.
Repair Requirements
for Rehabilitated
Sections
Not available.
V. Costs
Key Cost Factors Not available.
Case Study Costs e.g. for 8 inches = approx. $14/feet material, chemicals, foil, glass fiber and
approx. $12/feet installation, cleaning, mobilization
VI. Data Sources
References Trenchless Technology International, Pumper & Cleaner Magazine
A-63