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

Technology/Method CIPP/Pull in Place/UV Cured
Claimed (500MM), liner suitable for fully deteriorated gravity host pipe.
Materials of The Berolina-Liner is made of up to 5 layers of glass-fiber and/or polyester web
Composition that is impregnated with a UV-light curing polyester resin. BKP uses only ISO
NPG resin of the type 1140 according to DIN 16946/2. The resin is qualified for
Group 3 in accordance to DIN 18820/1. For demanding requirements, a vinylester
resin is used. The inner protective film and outer UV resistant film are flexible,
water impenetrable and equipped with a styrene barrier. Minimum initial ring
flexural modulus claimed is 1.45 x 10 6 psi, and the approximate initial tensile
modulus 2.03 x 10 6 psi.
Diameter Range,
inches
6-40 inches (other sizes available upon request)
Thickness Range,
inches
0.08-0.47 inches (2-12 mm), depending on diameter
Pressure Capacity, New Berolina-LP-Liner (low pressure) currently in test phase with pressure
psi
capacity up to 45 psi.
Temperature Range,
o
F
Polyester resin up to 122°F; Vinylester resin up to 158°F
Renewal Length, feet 1,200 feet (400 m)
Other Notes Licensed CIPP Corp (Hudson, IA) to be sole nationwide US provider in Nov.
2008.
Local contractors acceptable
III. Technology Design, Installation, and QA/QC Information
Product Standards According to EN 13566-4/DRAFT INTERNATIONAL STANDARD ISO/DIS
11296-4; ASTM not applicable, new ASTM standard in preparation
Design Standards ATV-M 127-2; ASTM F1216, Appendix X.1
Design Life Range Minimum 50 years
Installation
Standards
New ASTM standard in preparation; WRc certified installation manual available
Installation
• The host pipe is first thoroughly cleaned and CCTV inspected. A protective
Methodology
film sleeve, covering the lower half of the host pipe, is next drawn into the
pipe to be rehabilitated by a winch. The Berolina-Liner is then winched into
place and both ends are closed off with end cans. The tube is calibrated
using compressed air (7.5 psig), which presses the liner against the host
pipe’s inner wall.
• The outer UV resistant tube prevents migration of the resin and styrene into
the soil and groundwater, and also prevents resin from penetrating the
laterals.
• After expansion of the liner, a special UV light is “fired” and pulled through
the liner at a defined speed. A CCTV camera can monitor the liner during
the passage of the light train.
• With the tube ends sealed, the curing occurs free of any emissions.
• After curing, the inner film is removed leaving a smooth inner surface.
• Laterals are easily identified (outward expansion of liner) and reinstated
using conventional robotic cutters.
QA/QC BKP controls the quality of the liner with testing of the liner and components at
their plant, as well as during and after curing in the field.
Qualification testing of the liner has included:
• high pressure water jet cleaning (Hamburg Model) – 60 passes
• 10,000 hrs fatigue (creep) tests
• leakage tests (CP308)(water impermeability)
• Darmstadt tilted drain experiment (abrasion test)
• burning test
The more important QA (factory) requirements are:
• reactivity tests of resin
• impermeability tests (DIN/EN 1610)
• wall thickness measurement
A-47