1. TRENCHLESS LATERAL RENEWAL TECHNOLOGIES
TRENCHLESS LATERAL RENEWAL TECHNOLOGIES. LESSIONS LEARNED AND THE RELEVANCE OF QUALITY MATERIALS AND INSTALLATION PRACTICES”
Good morning Ladies and Gentlemen, My name is Andy Sherwin, I am the Canadian Representative for LMK Technologies. I would like to talk a little about Lateral Pipe Renewal Techniques and the materials used to perform lateral repairs.
Presented By:
Andy Sherwin
LMK Technologies

2. Overview of Existing Lateral Lining
Systems, Materials and Installation
Practices:
Resin Systems
Liner Tubes and Flat Sheets
Bladder Tubes
Installation Methods
Good morning Ladies and Gentlemen, My name is Andy Sherwin, I am the Canadian Representative for LMK Technologies. I would like to talk a little about Lateral Pipe Renewal Techniques and the materials used to perform lateral repairs.

3. Resin Systems~ Polyester Resin Systems (Longest History for CIPP)
Ambient Cure 2-Hour Cure from time of mixing
Steam Cure 30-Minute Cure from time of mixing
Can easily adjust catalyst
All Cured in Place Pipe Liners typically use one of three resin systems. Polyester resin is the most widely used resin system for CIPP lining and has the longest history. Polyester is the most versatile and predictable resin however does have a

4. Resin Systems~ Epoxy Resin Systems (2-3 more expensive)
Ambient Cure 3–8 Hour Cure from time of mixing
Steam Cure 1-Hour Cure from time of mixing
Typically, catalyst cannot be adjusted
Epoxy resins have become very popular for lateral renewal, they are however 2 to 3 times more expensive than polyester resin and if used with ambient cure methods, can be very unpredictable depending on the temperature of the day and in cold weather can take up to 12 hours to cure.

5. Resin Systems~ VOC Free Vinyl-Ester Resin Systems
Ambient Cure 2-Hour Cure from mixing
Steam Cure 30-60Minute Cure from mixing
Can easily adjust catalyst
VOC free Vinylester resins are priced between polyester and epoxy resins and offer an odor free installation.
Vinylester, as with epoxy resins is very sensitive to temperature and if used for ambient cure purposes can take many hours before the pipe is ready to return to service.

6. Liner Tubes & Sheets~ Needle Punched Felt (longest history)
Can be difficult to Invert, especially 4-inch
Stretches in length, but can be scrim reinforced
Not designed to
negotiate hard bends
Wrinkles on bends
45-degrees and greater
Diameters 4” – 8”
Now lets take a look at the liner tube itself, this is primarily designed as a carrier for the thermoset resin,
which is where the strength of the liner come from. Needle punched felt is the most widely used however has some limitations.
When installing around bends, this felt will wrinkle and crease.

7. Glass Composite Needle Punched Felt
Liner Tubes & Sheets~
Glass Composite Needle Punched Felt
Can be difficult to Invert, especially 4-inch
Does Not Stretch in Length
Not designed to
negotiate hard bends
Wrinkles on bends
45-degrees plus
Extremely high
physical strengths
Diameters 4” – 8”
This is a fairly new addition to liner technology and is basically a sandwich of needle punched felt with a glass fiber filler,
this tube will not stretch in length and will wrinkle on bends of 45 degrees or more.
The tube offers approx 2 to 3 times higher physical properties than regular needle punched felt.

8. Designed to negotiate hard bends Minimal or no wrinkling on bends
Liner Tubes & Sheets~
Knitted Tubes
Easy to Invert
Stretch in length
Designed to negotiate hard bends
Minimal or no wrinkling on bends
Moderate to medium physical strengths
Diameters 2” – 8”
Lining a bend requires
longitudinal stretch
Flexible liners have become more commonplace in the past few years, these are of a knitted fabrication and are designed to stretch around up to 90 degree bends. Unfortunately these tubes do stretch longitudinally also, hence allowances must be made so as not to stretch into main or over existing connection etc.

9. Pushed or Pulled in-place on an inflatable plug
Liner Tubes & Sheets~
Flat Sheet Liners
Pushed or Pulled in-place on an inflatable plug
Typically does not stretch in length or width
Not designed to
negotiate hard bends
Wrinkles on bends
45-degrees plus
Diameters 4” – 8”
Flat sheet liners are typically used for pull in place or push in place lining.
They will be wrapped around an inflatable packer and winched into place.
Flat sheet liners are typically impregnated by spreading resin onto the sheet prior to wrapping around the plug, it can be difficult to ensure a uniform wetout and strength of the finished liner.

10. Non-Translucent Bladder Not compatible as liner/bladder assembly
Bladder Tubes~
Non-Translucent Bladder
Not compatible as liner/bladder assembly
Cannot view resin saturation
Used with a 2-step
Inversion Process
The bladder or calibration tube is used to inflate the liner during the curing process,
there are two styles of bladder available the first is non translucent, this is typically used for two step inversion.
Where the liner is inverted first and then the bladder is inverted inside the liner.
The downside of this is that the liner is deflated and infiltration can be trapped behind the liner.

11. Compatible as liner/bladder assembly
Bladder Tubes~
Translucent Bladder
Compatible as liner/bladder assembly
Allows visual verification of resin saturation
Used with a 1-step Inversion Process
The translucent bladder allows for the liner and bladder to be pre-assembled,
wetout and installed together i.e. a single step inversion. Installing the liner in this way gives the benefit of keeping the liner fully inflated during the installation and curing.

12. Installation Methods~
Pull-in-place
Short to long repairs (1’ – 50’)
Requires 2 access points (MH street & cleanout)
Placed on pneumatic plug
Liner tubes or flat sheet (tube vacuum saturation)
Resin loss with flat sheet
Tube prevents resin migration
Negotiating hard bends may be difficult or impossible
Moving on to installation methods, the first topic for discussion is the Pull in place method, PIP will require two points of access typically manhole in road and cleanout.

13. Installation Methods~
Inversion Technique
Long repairs up to 200-feet in length
Requires only one access point (cleanout or MH)
2-step inversion process
1-step inversion process
Far more versatile technology, only one point of access required for installation
Liner lengths of 200ft or more in one installation
Only one access required
Comes in two styles of installation
2 step inversion
Or more recently One step inversion

14. Installation Methods~
2-Step Inversion Process
Excavation is typically made to access lateral pipe
Liner tube is vacuum impregnated
Liner is inverted, end of tube is sealed with a ..rubber band, tube pops open releasing bands
End of liner is open, no pressure, liner collapses
Second inversion inserts bladder inside of liner
Liner starts at excavated access point
An open access or manhole is required to perform lining
Once liner tube is impregnated the liner is inverted into the sewer and deflated
Secondly the bladder is inverted into the liner tube
Downside is that while the liner is deflated water can get trapped behind the liner causing soft spots, or water blisters
No control over the liner inversion

15. Installation Methods~
1-Step Inversion Process
Liner and bladder joined as an assembly
Liner vacuum saturated within translucent bladder
Liner and bladder are pre-assembled
Liner is attached to the bladder at a pre-determined position
Liner can be impregnated within the translucent bladder
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16. Installation Methods~
1-Step Inversion Process
Can be inverted through an existing cleanout (no digging)
Liner then pulled into inversion tank and both liner and bladder inserted
Liner can now be Remote started at any point in the pipe
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17. Installation Methods~
1-Step Inversion Process
Liner and bladder are inverted simultaneously
Controlled inversion bladder connected to tag line
The inversion is completely controlled by using a tag line or hold back rope
This ensures that all standing water is displaced during the inversion
Hence no soft spots, uncured liner or water blisters will occur.
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18. Installation Methods~
1-Step Inversion Process
Pressure maintained uniform resin migration
Liner can be inspected under pressure before the ..curing process begins
When in place, pressure is kept in the liner bladder assembly – no deflation
A cctv mini camera can now be inserted into the liner toi ensure that it is fully deployed, and in the correct place
The curing process can now begin
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19. Pan/tilt Push Lateral Camera Launched from the Main
Where No Access Exists
What to do when you have no access or the homeowner can not be scheduled around.
The Vac-a-tee system is a great way of gaining access to a lateral pipe,
Initial locating will be performed to pinpoint where the new c/o needs to be positioned
Pan/tilt Push Lateral Camera Launched from the Main
Locating Camera Sonde

20. Vacuum Excavated Cleanout
Small Borehole versus Open Trench : No Shoring
No Damage to Adjacent Utilities or Landscaping
No Large Piles of Dirt
Minimal Restoration
Vacuum excavation is then used to bore a small hole hole approx 18 diameter
This is non invasive to residents
Safe for sub surface utilities
No mess

21. Small Isolated Footprint
Soil is Pulled Away from Pipe
Pipe is cleaned with High Pressure Water
The pipe is cleaned and prepared using high pressure water

22. Saddle Attached to Riser Pipe
Bore Hole filled w/ Sand
Riser Pipe filled w/ Water
Leak Test is Performed
Crown of Pipe is Cut
Sod is Replaced
A hydrophilic sealant adhesive is then used to attache the vac a tee saddle to the lateral
The saddle is snapped into place and allowed to cure
Once cured the hole is backfilled and the lateral pipe is cored to gain access into the lateral for cleaning inspection and rehabilitation.

23. Vacuum Installed Cleanout
Same Day Restoration
Typically the new cleanout is fully restored the same day with no disruption to service.
Vacuum Installed Cleanout
Fast
Non-Disruptive
Socially Accepted

24. TRENCHLESS LATERAL RENEWAL
TECHNOLOGIES
The correct materials combined with proper installation practices produce successful Lateral Lining and Connection Sealing Repairs.

25. Thank You for attending!
TT Road show 2010
Thank You for attending!
For a copy of this presentation contact:
LMK Enterprises, Inc.