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l � <br /> Mr. Larry Hamer <br /> February 13, 1996 <br /> Page 2 <br /> 8. Strengthening the existing pipe by the manufacturing of a tight fitting Insitupipe®within the <br /> old; bridging joints, cracks and disconnected pipes into a single continuous conduit. <br /> Briefly, here are just a few of the benefits realized from the reconstruction of pipelines using the <br /> Insituform process: <br /> Virtually eliminates excavation problems - depending on the type of pipe or passageway to be <br /> reconstructed(sewers,drains,or conduits) excavation can virtually be eliminated. Existing access <br /> ,71 (sewer manholes)is usually sufficient. Side connections can generally be'reinstated' by cutting out <br /> ', from within. Bends can be negotiated. <br /> Restores full size capacity - reduces maintenance - this tight fitting pipe is continuous over pipe <br /> joints, openings and faults, the capacity is nearly always increased. The smoothness also reduces <br /> depositions because there are no places for deposition to form, thereby reducing maintenance. <br /> Builds corrosion resistant pipe-resists chemical attack-various thermosetting resins can be selected <br /> • to resist the corrosive effects of the effluent. <br /> Builds a continuous nine-(a new pipe within the old) -this pipe bridges breaks and missing sections <br /> of pipe eliminating infiltration or exfiltration or loss of product in pressure pipes. Insituform fits <br /> tightly and bridges disconnected pipes into a single continuous pipe. <br /> Reconstructs unusual shaped pipes without loss of capacity -elliptical, egg shaped, flat bottom <br /> ' horseshoe or rectangular conduits can be reinstated to their existing shape by this tight fitting pipe. <br /> Accomplishes these things in sizes from 4 inches to 8 feet in diameter - Insitupipes have been <br /> constructed to these sizes and may be applicable to those beyond. <br /> Builds or repairs pressure pipes -the thermosetting nature of the resins used yield three dimensional <br /> cross linking; strength in both tensions and compression and high flexural modulus. The result is <br /> a cast-in-place pressure pipe. Few, if any, such field constructed pipes can compare in strength. <br /> J Solves difficult jobs - in addition to negotiating bends, it is possible to reconstruct with the <br /> Insituform process, remote sections inaccessible to wheeled vehicles (e.g. inside buildings). In <br /> addition to being installed without excavation,Insitupipes have been installed where access to only <br /> one end is feasible (vertical wells). Also, it is possible to reconstruct only a portion of a pipeline or <br /> pipelines with reducers. <br /> _r <br />