Page 152 - Trenchless Technology Piping Installation and Inspection
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118 Cha pte r T h ree
methods, including fast return to service (and significantly reducing
or potentially eliminating the need for bypass pumping), providing
a barrier for corrosion protection, filling minor cracks and holes,
and in certain products, enhancing the design life of the existing
pipe (a semi-structural product). Polyurethane, epoxy, and polyurea
lining methods do not plug the service connections, valves, and other
appurtenances and can also accommodate minor bends.
