Cured in Place Pipe Underground No-Dig pipeline rehabilitation for - PowerPoint PPT Presentation

Cured in Place Pipe – Underground No-Dig pipeline rehabilitation for pressure pipe application – A fully structural approach

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Why CIPP?

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' JGKGH8&H) $ 84&- I$ Collapsed sewer Burst water main Collapsed Sewer Collapsed sewer collector

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Green Solutions

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Other Trenchless Technologies

> 7H) $' &'G $J G>&H&H) W$- !;)G>&H&H) $ J 7>>?7!H $ • � Technology • � The old pipe will be cleaned and calibrated • � Controll via TV-inspection • � Welding of the new pipes • � Pull in of the new pipe by a winder • � Applications • � For almost all host materials • � DN 80 – 1000 mm • � Pros • � Factory manufactured plastic pipe, Costs at the lower end • � Cons • � Substantial reduction in cross sectional area of the new pipe • � Annulare gap between host pipe and new pipe at Sliplining • � Requires a big pit excavation • � Bends restrictions • � Requires exact calibration of the host pipe • � Large space requirements as entire length of the pipe has to be laid out on the ground

% >7-G QM &8 $ 8G%4H7>7)L $ Technology � � Usage of a reforming pipe � � � � reduction of diameter � � high elasticity The Close Fit liner is moved into the old pipe through existing � � chamber or through a small trench Reforming of the Close Fit Liner with temperature (and � � pressure) The new pipe is pressed exactly on the inner wall of the old � � pipe and take on the function of the old pipe Applications � � � � Drinking water, gas, industrial, oil, and sewage pipes Diameter DN 100 – 400 mm � � Pros � � Little reduction in cross-sectional area (wall thickness of the � � pipe) Minimal digging � � No welding on site � � � � Cons Depends exactly on calibration of host pipe, not flexible in � � host pipe diameter Limited diameter range � � Bends restrictions � � Material comparatively expensive � � Sourcing in remote countries, coils are large in DN, difficult � � and expensive to transport Inflexible in diameter changes � �

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Assessment and Liner Design

Classification according to AWWA M28 – Good tool to categorise existing technologies Non-structural Semi-Structural Fully Structural Internal Lining Lining with load Internal Coating Bears full loads bearing Liner Charatceristics Class 1 Class 2 Class 3 Class 4 according to AWWA Internal corrosion Yes es Yes es Yes es Yes es protection Hole and gap span at No No Yes es Yes es Yes es MAOP No No No No Yes es Yes es Inherent ringstiffness No No No No No No Yes es PN Lnier > MAOP Liner survives host pipe No No No No No No Yes es failure 8"+$<,35+*$1.$<$,+5$A2A+/2,+$

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