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

to Brandenburger. The product is called Blue-Tec in Germany, Eco CIPP in the UK and UV CIPP in
some other countries. Blue-Tek is primarily marketed for gravity sewer applications. Blue-Tek does not
have NSF 61 certification, so it’s not suitable for potable water applications. Application for NSF 61 is
being considered for the future. Blue-Tek is a glass reinforced CIPP liner that is UV-cured. The liner
strength stems from a seamless, spirally wound glass fiber tube that is impregnated with polyester (ortho)
or vinylester resins. All wet out is performed in the Saltville plant. The seamless liner has an inner and
outer film, with the outer film blocking UV light. Care is needed to ensure the outer film is not damaged
during installation. The inner film is removed after curing. The glass reinforcement used is Owens
Corning’s Advantex ® EC-R glass, which is a highly acid resistant glass fiber. Blue-Tek is available in
diameters from 6 to 48 inches (150 to 1,200 mm) and can be used in circular, oval, and egg-shaped pipes.
Reline America reports that liners up to 60 inches (1,500 mm) will be available in the near future. The
short-term flexural modulus is 1.1×10 6 psi (7.6 x 10 4 bar), with increases to 2.16×10 6 psi (14.9 x 10 4 bar)
possible. For long-term modulus, a reduction factor of 1.6 is used. The short-term tensile strength is
reported to be 20,000 to 26,000 psi (1,379 to 1,793 bar). No long-term test data are available which limits
the Blue-Tek liner to semi-structural applications. The product conforms to ASTM F2019 and would be
designed in accordance to ASTM F1216, Appendix X1. Renewal lengths of up to 1,000 feet (305 meters)
are achievable. Blue-Tek is winched into the existing pipe and inflated with air pressure (6 to 8 psi [0.4 to
0.55 bar]) and then cured using a UV light train. Reline America promotes its Quality-Tracker System
for tracking the entire curing process (seven steps) with a data logger and retrieval system. In addition to
CCTV inspection of the line before and after curing, a record of the liner’s inner air pressure during
curing, the curing speed (feet/min), and resin reaction temperatures (infrared sensors) are all monitored.
Reline America claims that minimal styrene is released into the environment with their process.
InsituMain by Insituform Blue
In 2009, Insituform introduced its latest addition to their CIPP product line referred to as InsituMain.
InsituMain is a fully structural Class IV CIPP liner that has an NSF 61 certification and is suitable for
both potable and non-potable pressure applications, including sewer force mains. InsituMain is available
in nominal diameters of 6 to 36 inches (150 to 900 mm) and for pressures up to 150 psi (10 bar). The
InsituMain system has a polyethylene layer on the inside pipe surface that increases the pipe's
smoothness, reduces surface friction, minimizes reduction in flow, and provides an additional corrosion
barrier for the pipe. It is composed of an epoxy composite layer, which is reinforced with glass and/or
polyester fiber materials (depending on a number of design elements including the host pipe diameter and
internal pressure requirements). The InsituMain product is saturated with epoxy resin, either on the job
site or in an authorized wet out facility, inserted into the host pipe either by inversion or by pulling-in, and
cured with either hot water or steam. The InsituMain system, which adheres to the host pipe, provides a
continuous, structural pipe. Because the liner does adhere to the host pipe, special fittings to seal the ends
are not required.
3.4.5 Woven Hose Lining System. Woven hose linings differ from ordinary CIPP products by the
construction of the tube reinforcement. Rather than being made of a felt type material, hose liners are
made from either polyester, glass, or aramid fibers that are woven into a hose-type configuration, similar
to the type of construction used for fire hoses. The weaving pattern can be varied to give different
properties in the circumferential and axial direction. Typically, hose liners are pulled into place rather
than installed by inversion as they have relatively high axial strength. Three types of woven hose lining
systems are discussed below including adhesive-backed linings, non-adhesive backed linings, and glassreinforced
thermoplastic linings. It is also noted whether or not the lining system is semi-structural or
structural in nature.
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