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What are the liners made of?
CIPP (cured-in-place pipe) liners or “felts” are made of a fiberglass/polyester blend smooth on the inside for maximized flow rate and woolly on the outside to accept the wet epoxy or resin.
SIPP (sprayed-in-place-pipe) utilizes epoxies or polymers designed for specific applications, which are mixed with an activator at the spray head by varying ratios depending on the product.

Are the Epoxies and Polymers proven?
We use up to a dozen different epoxies and polymers. They are thoroughly tested for a variety of conditions including acid resistance, no leachate, certified for potable water, solvent resistance, heat resistance and dielectric reading, etc. We can provide Data and MSDS sheets for all our lining products.

How do I know the pipe was lined?
Before the job for analysis of the pipes condition and best solution we insert a high-resolution camera for visual verification of condition and path of the pipe. After the lining application, we re camera the pipe to ensure the completeness and integrity of the lining. All video files are provided to the client after completion of the work.

How accurate and uniform is the Thickness of the Lining?
Very accurate and uniform, or direct application, our computer monitors the flow rate of the epoxy or polymer and the speed (feet per minute) of the application. The result is an accurate thickness of the deposition. We create a computer record of the deposition over the length of the pipe and that record is provided to you. For Felt/Epoxy lining processes the Felt is “Wetted Out” with the epoxy using a calibrated press to ensure uniform saturation of the felt through out before installation into the pipe.

How about Access to the Pipe?
For felt/epoxy CIPP liner applications (“cured-in-place pipe”) such as drainage lines 8” diameter and under, access at one end is sufficient if there are limited bends in the line. For pressurized pipe such as condensate return or water lines access at both ends is necessary to seal the pipe ends after lining to eliminate back pressure entering behind the liner. For larger diameter main lines above 8” diameter access at both ends is necessary for steam cure of the liner and is typically managed between manhole runs or predetermined access points at mechanical connections or excavation. For vertical risers or horizontal SIPP process (sprayed-in-place pipe) access is necessary at both ends of the lining run in order for the spin head to 
“Spin Up” to proper mix ratio before being pulled through the pipe.

Do you work in Winter?
We can work year around.

How long does the Epoxy or Polymer take to Cure?
For direct application such as in risers, the interior is tacky within 30 minutes and you can run water through it within an hour. For pipe liners with the heavier application of epoxy, the normal cure time is 4-8 hours, however with the application of steam heat, the cure time can be reduced to 2 hours.

How do you handle Lateral Connections to Drains and Condensate Returns?
When we camera the pipe initially, the location of laterals is precisely recorded. After the pipe is lined and cured, we go back in with another camera guided state of the art Robotic Reinstate device that quickly grinds out the liner at the laterals to reinstate the openings.  With SIPP (sprayed-in-place-pipe) applications there is no need to reinstate lateral connections.

Can you make Turns?
In most cases we can make up to 90 degree turns in liner applications and 45 degree turns in sprayed in applications of epoxy. Generally the larger the diameter of the pipe the more bends can be accommodated in a run. When not possible, we attack the bend from the other direction or divide the runs into manageable sections through opening further access points.


Pipelining FAQ's
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