The tube is turned insideout and pressed against ... of GR

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• Cured-in-Place-Pipe
• Kansas State University
• A.S.C.E. Student Chapter
• February 12, 2009

Brian T. McCrary, P.E. Insituform Technologies
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CURED-IN-PLACE-PIPE (CIPP)

• Manufacturing a pipe in-place
  usually completed without excavating.

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Cured-in-place-pipe

• Developed in 1971 in England by Eric Wood
• Rapid method of pipe repair
• Small diameter pipes were the initial envelope
• Gravity sanitary storm sewers laterals
• Pressure water lines, force mains industrial
• Remotely reinstate service connections
• Insituform has installed approx. 17,000 miles of
  CIPP

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Technical Envelope Gravity Application

• Sizes 4 to 108
• Thickness ¼ to 2
• Structural renewal system
• Can do bends
• Lengths to 2000 ft
• Thickness changes
• Diameter changes

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Components

• CIPP Tube
• Felt material
• Reinforcing fibers
• Thermosetting Resin
• Polyester
• Vinyl ester
• Epoxy

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Pipe Assessment

• The host pipe will determine what product can be
  used.
• Current design models are dependent upon the
  condition of the host pipe.

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Wall Thickness Design

• Select type of CIPP
• Tube materials
• Resin
• Determine wall thickness with standard industry
  equations
• ASTM F 1216 07b
• Fully structural
• External hydrostatic pressure only

Soil
Ground Water
H
D
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Tube Manufacturing

• Tubes are manufactured to the diameter, length
  installation. and thickness for each

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Installation Methods

• ASTM F 1216
• Describes installation by inversion.
• The tube is turned inside-out and pressed against
  the host pipe.
• Inversion pressure supplied by air or water.
• Cure is with hot water or steam.

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Installation Methods

• ASTM F 1743
• Describes installation by pulling-in.
• The tube is pulled into the host pipe and then
  expanded.
• Inflation is with air or water
• Cure is with hot water or steam.

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Installation Methods

• ASTM F 2019
• Describes installation of GRP tubes by pulling-in
• The tube is pulled into the host pipe and then
  expanded.
• Inflation is with air.
• Cure is with steam or UV light.

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Small Diameter Inversions
Air Inversion
Water Inversion
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Inverting Face
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Installation by Inversion

• Inversion water or air is heated to begin curing
  process.
• The cured CIPP forms to the existing pipe wall.

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Installation by Pull-In

• Tube is pulled-in with a winch

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Installation by Pull-In

• Tube is typically inflated with air.
• Calibration or inflation hoses can be used

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Installation by Pull-In

• Once inflated with air, the tube is cured.
• UV light
• Steam
• Hot water

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Lateral Reinstatement

• Service laterals are reinstated internally with a
  robotic cutting device and CCTV

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Large Diameter

• Several installation methods
• Air-invert-steam-cure

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Large Diameter

• Pull-in process
• Steam, UV light or hot water cure

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Large Diameter

• Water inversion installation
• Hot water cure

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Large Diameter
Wetout Over-the-Hole
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Large Diameter
Termination of Large Water Inversion
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Large Diameter

• 99 inch equivalent diameter culverts

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QUESTIONS ? ?