The following installation techniques are generalized descriptions of the direct inversion  and pulled-in-place methods of installing CIPP.  Both methods have been used successfully to install millions of feet of CIPP.  Since both methods can offer distinct installation benefits such as the ability to install longer lengths in a single installation or the ability to better negotiate bends, it is the opinion of Inliner Technologies that the actual installation method used be left up to the installation contractor.  Although both methods share common procedures, the equipment and job site preparations are unique to the type of installation and, therefore, would be considered during the planning process.  

Pull-in-Place Method
The pulled-in-place method of installing CIPP is generally described in ASTM F1743 and the techniques recommended and used by Inliner Technologies are designed to meet and/or exceed the requirements of this standard practice.  The pulled-in-place process begins with the resin-impregnated tube being attached to a cable that has been pulled through the existing pipe.  After being carefully pulled through the pipe,  static pressure is used to inflate the tube and hold it tightly against the host pipe.  The tube is then cured using either water cure or steam cure methods.

Direct Inversion
The direct inversion installation of CIPP is specified in ASTM F1216 and the techniques recommended and utilized by Inliner Technologies are designed to meet and/or exceed the requirements of this standard practice.  Initially the resin saturated tube is turned inside out and attached to a top ring or pulled through a column.  Water or air is then added to the tube to create static pressure and force the tube to continue to invert through the complete length of the pipe. The static pressure is also used to inflate the tube and hold it tightly against the host pipe.  The tube is then cured using either water cure or steam cure methods.

Curing Methods
After the inversion is completed, a suitable heat source and water or steam recirculation equipment is required to circulate heated water or steam throughout the pipe.  The equipment should be capable of delivering hot water or steam throughout the section to uniformly raise the water or steam temperature above the temperature required to affect a cure of the resin.  The temperature profile is closely monitored in accordance with Inliner's patented heating methods to produce the optimum installed physical properties.