ASTM F1743-08(2016)

Standard Practice for Rehabilitation of Existing Pipelines and Conduits by Pulled-in-Place Installation of Cured-in-Place Thermosetting Resin Pipe (CIPP)

SIGNIFICANCE AND USE
4.1 This practice is for use by designers and specifiers, regulatory agencies, owners, and inspection organizations who are involved in the rehabilitation of conduits through the use of a resin-impregnated fabric tube pulled-in-place through an existing conduit and secondarily inflated through the inversion of a calibration hose. Modifications may be required for specific job conditions.
SCOPE
1.1 This practice describes the procedures for the reconstruction of pipelines and conduits (4 to 96 in. (10 to 244 cm) diameter) by the pulled-in-place installation of a resin-impregnated, flexible fabric tube into an existing conduit and secondarily inflated through the inversion of a calibration hose by the use of a hydrostatic head or air pressure (see Fig. 1). The resin is cured by circulating hot water or by the introduction of controlled steam into the tube. When cured, the finished cured-in-place pipe will be continuous and tight fitting. This reconstruction process may be used in a variety of gravity and pressure applications such as sanitary sewers, storm sewers, process piping, electrical conduits, and ventilation systems.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
Note 1: There are no ISO standards covering the primary subject matter of this practice.  
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Apr-2016
• ICS: 23.040.20 - Plastics pipes
• Technical Committee: F17 - Plastic Piping Systems
• Drafting Committee: F17.67 - Trenchless Plastic Pipeline Technology

Relations

• Replaces: ASTM F1743-08 - Standard Practice for Rehabilitation of Existing Pipelines and Conduits by Pulled-in-Place Installation of Cured-in-Place Thermosetting Resin Pipe (CIPP)
• Effective Date: 01-May-2016
• Referred By: ASTM F3240-19e1 - Standard Practice for Installation of Seamless Molded Hydrophilic Gaskets (SMHG) for Long-Term Watertightness of Cured-in-Place Rehabilitation of Main and Lateral Pipelines
• Effective Date: 01-May-2016
• Referred By: ASTM D5813-04(2018) - Standard Specification for Cured-In-Place Thermosetting Resin Sewer Piping Systems
• Effective Date: 01-May-2016

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: F1743 − 08 (Reapproved 2016)
Standard Practice for
Rehabilitation of Existing Pipelines and Conduits by Pulled-
in-Place Installation of Cured-in-Place Thermosetting Resin
Pipe (CIPP)
This standard is issued under the fixed designation F1743; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* D790 Test Methods for Flexural Properties of Unreinforced
and Reinforced Plastics and Electrical Insulating Materi-
1.1 This practice describes the procedures for the recon-
als
struction of pipelines and conduits (4 to 96 in. (10 to 244 cm)
D903 Test Method for Peel or Stripping Strength of Adhe-
diameter) by the pulled-in-place installation of a resin-
sive Bonds
impregnated, flexible fabric tube into an existing conduit and
D1600 Terminology forAbbreviatedTerms Relating to Plas-
secondarily inflated through the inversion of a calibration hose
tics
bytheuseofahydrostaticheadorairpressure(seeFig.1).The
D1682 Test Method for Breaking Load and Elongation of
resin is cured by circulating hot water or by the introduction of
Textile Fabric
controlled steam into the tube. When cured, the finished
D3039/D3039M Test Method for Tensile Properties of Poly-
cured-in-place pipe will be continuous and tight fitting. This
mer Matrix Composite Materials
reconstruction process may be used in a variety of gravity and
D3567 Practice for Determining Dimensions of “Fiberglass”
pressure applications such as sanitary sewers, storm sewers,
(Glass-Fiber-Reinforced Thermosetting Resin) Pipe and
process piping, electrical conduits, and ventilation systems.
Fittings
1.2 The values stated in inch-pound units are to be regarded
D4814 Specification for Automotive Spark-Ignition Engine
as standard. The values given in parentheses are mathematical
Fuel
conversions to SI units that are provided for information only
D5813 Specification for Cured-In-Place Thermosetting
and are not considered standard.
Resin Sewer Piping Systems
E797 Practice for Measuring Thickness by Manual Ultra-
NOTE 1—There are no ISO standards covering the primary subject
matter of this practice.
sonic Pulse-Echo Contact Method
F412 Terminology Relating to Plastic Piping Systems
1.3 This standard does not purport to address all of the
F1216 Practice for Rehabilitation of Existing Pipelines and
safety concerns, if any, associated with its use. It is the
Conduits by the Inversion and Curing of a Resin-
responsibility of the user of this standard to establish appro-
Impregnated Tube
priate safety and health practices and determine the applica-
2.2 AWWA Standard:
bility of regulatory limitations prior to use.
M28 Manual on Cleaning and Lining Water Mains
2. Referenced Documents
2.3 NASSCO Standard:
Recommended Specifications for Sewer Collection System
2.1 ASTM Standards:
Rehabilitation
D543 Practices for Evaluating the Resistance of Plastics to
Chemical Reagents
3. Terminology
D638 Test Method for Tensile Properties of Plastics
3.1 General—Definitions are in accordance with Terminol-
ogy F412. Abbreviations are in accordance with Terminology
1 D1600, unless otherwise indicated.
This practice is under the jurisdiction of ASTM Committee F17 on Plastic
Piping Systems and is the direct responsibility of Subcommittee F17.67 on
Trenchless Plastic Pipeline Technology.
Current edition approved May 1, 2016. Published May 2016. Originally Withdrawn. The last approved version of this historical standard is referenced
approved in 1996. Last previous edition approved in 2008 as F1743 – 08. DOI: on www.astm.org.
10.1520/F1743-08R16. Available fromAmerican Water WorksAssociation (AWWA), 6666 W. Quincy
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Ave., Denver, CO 80235, http://www.awwa.org.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Available from the National Association of Sewer Service Companies,
Standards volume information, refer to the standard’s Document Summary page on NASSCO 11521 Cronridge Drive, Suite J Owings Mills, MD 21117, http://
the ASTM website. www.nassco.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1743 − 08 (2016)
4. Significance and Use
4.1 This practice is for use by designers and specifiers,
regulatory agencies, owners, and inspection organizations who
are involved in the rehabilitation of conduits through the use of
a resin-impregnated fabric tube pulled-in-place through an
existing conduit and secondarily inflated through the inversion
of a calibration hose. Modifications may be required for
specific job conditions.
5. Recommended Materials and Manufacture
5.1 General—The resins, fabric tube, tube coatings, or other
materials, such as the permanent calibration hose when com-
bined as a composite structure, shall produce CIPP that meets
the requirements of this specification.
5.2 CIPP Wall Composition—The wall shall consist of a
plastic coated fabric tube filled with a thermosetting (cross-
linked) resin, and if used, a filler.
5.2.1 Fabric Tube—The fabric tube should consist of one or
more layers of flexible needled felt, or equivalent, woven or
nonwoven material(s), or both, capable of carrying resin,
withstanding installation pressures, and curing temperatures.
The material(s) of construction should be able to stretch to fit
irregular pipe sections and negotiate bends. Longitudinal and
circumferential joints between multiple layers of fabric should
be staggered so as not to overlap. The outside layer of the
fabric tube should have an impermeable flexible coating(s)
whose function is to contain the resin during and after fabric
tube impregnation. The outer coating(s) must facilitate moni-
toring of resin saturation of the material(s) of construction of
FIG. 1 Cured-in-Place Pipe Installation Methods
the fabric tube. The fabric tube should be fabricated to a size
that, when installed, will tightly fit the internal circumference
and the length of the original conduit. Allowance should be
made for circumferential and longitudinal stretching of the
3.2 Definitions of Terms Specific to This Standard:
fabric tube during installation. As required, the fabric tube
3.2.1 calibration hose—an impermeable bladder which is
should meet minimum tensile strength requirements in the
inverted within the resin-impregnated fabric tube by hydro-
longitudinal and transverse directions as specified in 7.1. All
static head or air pressure and may optionally be removed or
the material(s) of construction for the fabric tube should be
remain in place as a permanent part of the installed cured-in-
compatible with the resin system used.
place pipe as described in 5.2.2.
5.2.2 Calibration Hose:
3.2.2 cured-in-place pipe (CIPP)—a hollow cylinder con-
5.2.2.1 Removable Calibration Hose—The removable cali-
sisting of a fabric tube with cured (cross-linked) thermosetting
bration hose should consist of an impermeable plastic, or
resin. Interior or exterior plastic coatings, or both, may be
impermeable plastic coating(s) on flexible woven or nonwoven
included.The CIPPis formed within an existing pipe and takes
material(s), or both, that do not absorb resin and are capable of
the shape of and fits tightly to the pipe.
being removed from the CIPP.
3.2.3 delamination—separation of layers of the CIPP.
5.2.2.2 Permanent Calibration Hose—The permanent cali-
bration hose should consist of an impermeable plastic coating
3.2.4 dry spot—an area of fabric of the finished CIPPwhich
on a flexible needled felt or equivalent woven or nonwoven
is deficient or devoid of resin.
material(s), or both, that are capable of absorbing resin and are
3.2.5 fabric tube—flexible needled felt, or equivalent, wo-
of a thickness to become fully saturated with resin. The
ven or nonwoven material(s), or both, formed into a tubular
calibration hose should be translucent to facilitate post-
shape which during the installation process is saturated with
installation inspection. The calibration hose should be fabri-
resin and holds the resin in place during the installation and
cated to a size that, when installed, will tightly fit the internal
curing process.
circumference and the length of the resin saturated fabric tube.
3.2.6 inversion—the process of turning the calibration hose
Once inverted, the calibration hose becomes part of the fabric
inside out by the use of water pressure or air pressure.
tube, and once properly cured, should bond permanently with
3.2.7 lift—a portion of the CIPPthat is a departure from the the fabric tube. The properties of the calibration hose should
existing conduit wall forming a section of reverse curvature in meet minimum tensile strength requirements in the longitudi-
the CIPP. nal and transverse directions as specified in 7.1. All the
F1743 − 08 (2016)
material(s) of construction for the calibration hose should be conventional sewer-cleaning equipment, then a point-repair
compatible with the resin system used. excavationshouldbemadetouncoverandremoveorrepairthe
5.2.3 Resin—A chemically resistant isophthalic based obstruction.
polyester, or vinyl ester thermoset resin and catalyst system or
6.2 Resin Impregnation—The fabric tube should be totally
an epoxy resin and hardener that is compatible with the
impregnated with resin (wet-out) and run through a set of
installation process should be used.The resin should be able to
rollers separated by a space, calibrated under controlled con-
cure in the presence of water and the initiation temperature for
ditions to ensure proper distribution of resin. The volume of
cureshouldbelessthan180°F(82.2°C).Thecuredresin/fabric
resin used should be sufficient to fully saturate all the voids of
tube system, with or without the calibration hose, shall be
the fabric tube material, as well as all resin-absorbing material
expected to have as a minimum the initial structural properties
of the calibration hose at nominal thickness and diameter. The
given in Table 1. These physical properties should be deter-
volume should be adjusted by adding 3 to 15 % excess resin to
mined in accordance with Section 8. The cured resin/fabric
allowforthechangeinresinvolumeduetopolymerization,the
tube system, with or without the calibration hose, should meet
change in resin volume due to thermal expansion or
the minimum chemical resistance requirements as specified in
contraction, and resin migration through the perforations of the
7.2.
fabric tube and out onto the host pipe.
6.3 Bypassing—If bypassing of the flow is required around
6. Installation Recommendations
the sections of pipe designated for reconstruction, the bypass
6.1 Cleaning and Pre-Inspection :
should be made by plugging the line at a point upstream of the
6.1.1 Prior to entering access areas, such as manholes, and
pipetobereconstructedandpumpingtheflowtoadownstream
performing inspection or cleaning operations, an evaluation of
point or adjacent system.The pump and bypass lines should be
theatmospheretodeterminethepresenceoftoxicorflammable
of adequate capacity and size to handle the flow. Services
vapors or lack of oxygen must be undertaken in accordance
within this reach will be temporarily out of service.
with local, state, or federal safety regulations.
6.3.1 Public advisory services shall notify all parties whose
6.1.2 Cleaning of Pipeline—All internal debris should be
service laterals will be out of commission and advise against
removed from the original pipeline. Gravity pipes should be
water usage until the main line is back in service.
cleaned with hydraulically powered equipment, high-velocity
jetcleaners,ormechanicallypoweredequipmentinaccordance
6.4 Installation Methods:
with NASSCO Recommended Specifications for Sewer Col-
6.4.1 Perforation of Resin-Impregnated Tube—Priortopull-
lection System Rehabilitation. Pressure pipelines should be
ing the resin-impregnated fabric tube in place, the outer
cleaned with cable attached devices or fluid propelled devices
impermeable plastic coating may optionally be perforated.
in accordance with AWWA M28.
When the resin-impregnated fabric tube is perforated, this
6.1.3 Inspection of Pipelines—Inspection of pipelines
shouldallowresintobeforcedthroughtheperforationsandout
should be performed by experienced personnel trained in
againsttheexistingconduitbytheforceofthehydrostatichead
locating breaks, obstacles, and service connections by closed-
or air pressure against the inner wall of the calibration hose.
circuit television or man entry. The interior of the pipeline
The perforation should be done after fabric tube impregnation
should be carefully inspected to determine the location of any
with a perforating roller device at the point of manufacture or
conditions that may prevent proper installation of the impreg-
at the jobsite. Perforations should be made on both sides of the
nated tube, such as protruding service taps, collapsed or
lay-flat fabric tube covering the full circumference with a
crushedpipe,andreductionsinthecross-sectionalareaofmore
spacing no less than 1.5 in. (38.1 mm) apart. Perforating slits
than 40 %. These conditions should be noted so that they can
should be a minimum of 0.25 in. (6.4 mm) long.
be corrected.
6.4.2 Pulling Resin-Impregnated Tube into Position—The
6.1.4 Line Obstructions—The original pipeline should be
wet-out fabric tube should be pulled into place using a power
clear of obstructions such as solids, dropped joints, protruding
winch. The saturated fabric tube should be pulled through an
service connections, crushed or collapsed pipe, and reductions
existing manhole or other approved access to fully extend to
in the cross-sectional area of more than 40 % that may hinder
the next designated manhole or termination point. Care should
or prevent the installation of the resin-impregnated fabric tube.
be exercised not to damage the tube as a result of friction
If inspection reveals an obstruction that cannot be removed by
during pull-in, especially where curvilinear alignments, multi-
linear alignments, multiple offsets, protruding services, and
other friction-producing host pipe conditions are present. Once
A
the fabric tube is in place, it should be attached to a vertical
TABLE 1 CIPP Initial Structural Properties
standpipe so that the calibration hose can invert into the center
Minimum Value
Property Test Method
of the resin-impregnated fabric tube. The vertical standpipe
psi (MPa)
should be of sufficient height of water head to hold
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: F1743 − 08 F1743 − 08 (Reapproved 2016)
Standard Practice for
Rehabilitation of Existing Pipelines and Conduits by Pulled-
in-Place Installation of Cured-in-Place Thermosetting Resin
Pipe (CIPP)
This standard is issued under the fixed designation F1743; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This practice describes the procedures for the reconstruction of pipelines and conduits (4 to 96 in. (10 to 244 cm) diameter)
by the pulled-in-place installation of a resin-impregnated, flexible fabric tube into an existing conduit and secondarily inflated
through the inversion of a calibration hose by the use of a hydrostatic head or air pressure (see Fig. 1). The resin is cured by
circulating hot water or by the introduction of controlled steam into the tube. When cured, the finished cured-in-place pipe will
be continuous and tight fitting. This reconstruction process may be used in a variety of gravity and pressure applications such as
sanitary sewers, storm sewers, process piping, electrical conduits, and ventilation systems.
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
NOTE 1—There are no ISO standards covering the primary subject matter of this practice.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2.1 ASTM Standards:
D543 Practices for Evaluating the Resistance of Plastics to Chemical Reagents
D638 Test Method for Tensile Properties of Plastics
D790 Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
D903 Test Method for Peel or Stripping Strength of Adhesive Bonds
D1600 Terminology for Abbreviated Terms Relating to Plastics
D1682 Test Method for Breaking Load and Elongation of Textile Fabric
D3039/D3039M Test Method for Tensile Properties of Polymer Matrix Composite Materials
D3567 Practice for Determining Dimensions of “Fiberglass” (Glass-Fiber-Reinforced Thermosetting Resin) Pipe and Fittings
D4814 Specification for Automotive Spark-Ignition Engine Fuel
D5813 Specification for Cured-In-Place Thermosetting Resin Sewer Piping Systems
E797 Practice for Measuring Thickness by Manual Ultrasonic Pulse-Echo Contact Method
F412 Terminology Relating to Plastic Piping Systems
F1216 Practice for Rehabilitation of Existing Pipelines and Conduits by the Inversion and Curing of a Resin-Impregnated Tube
2.2 AWWA Standard:
M28 Manual on Cleaning and Lining Water Mains
2.3 NASSCO Standard:
Recommended Specifications for Sewer Collection System Rehabilitation
This practice is under the jurisdiction of ASTM Committee F17 on Plastic Piping Systems and is the direct responsibility of Subcommittee F17.67 on Trenchless Plastic
Pipeline Technology.
Current edition approved Nov. 1, 2008May 1, 2016. Published November 2008May 2016. Originally approved in 1996. Last previous edition approved in 20032008 as
F1743–96 (2003). F1743 – 08. DOI: 10.1520/F1743-08.10.1520/F1743-08R16.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Withdrawn. The last approved version of this historical standard is referenced on www.astm.org.
Available from American Water Works Association (AWWA), 6666 W. Quincy Ave., Denver, CO 80235, http://www.awwa.org.
Available from the National Association of Sewer Service Companies, NASSCO 11521 Cronridge Drive, Suite J Owings Mills, MD 21117, http://www.nassco.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1743 − 08 (2016)
FIG. 1 Cured-in-Place Pipe Installation Methods
3. Terminology
3.1 General—Definitions are in accordance with Terminology F412. Abbreviations are in accordance with Terminology D1600,
unless otherwise indicated.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 calibration hose—an impermeable bladder which is inverted within the resin-impregnated fabric tube by hydrostatic head
or air pressure and may optionally be removed or remain in place as a permanent part of the installed cured-in-place pipe as
described in 5.2.2.
3.2.2 cured-in-place pipe (CIPP)—a hollow cylinder consisting of a fabric tube with cured (cross-linked) thermosetting resin.
Interior or exterior plastic coatings, or both, may be included. The CIPP is formed within an existing pipe and takes the shape of
and fits tightly to the pipe.
3.2.3 delamination—separation of layers of the CIPP.
3.2.4 dry spot—an area of fabric of the finished CIPP which is deficient or devoid of resin.
3.2.5 fabric tube—flexible needled felt, or equivalent, woven or nonwoven material(s), or both, formed into a tubular shape
which during the installation process is saturated with resin and holds the resin in place during the installation and curing process.
3.2.6 inversion—the process of turning the calibration hose inside out by the use of water pressure or air pressure.
3.2.7 lift—a portion of the CIPP that is a departure from the existing conduit wall forming a section of reverse curvature in the
CIPP.
4. Significance and Use
4.1 This practice is for use by designers and specifiers, regulatory agencies, owners, and inspection organizations who are
involved in the rehabilitation of conduits through the use of a resin-impregnated fabric tube pulled-in-place through an existing
conduit and secondarily inflated through the inversion of a calibration hose. Modifications may be required for specific job
conditions.
F1743 − 08 (2016)
5. Recommended Materials and Manufacture
5.1 General—The resins, fabric tube, tube coatings, or other materials, such as the permanent calibration hose when combined
as a composite structure, shall produce CIPP that meets the requirements of this specification.
5.2 CIPP Wall Composition—The wall shall consist of a plastic coated fabric tube filled with a thermosetting (cross-linked)
resin, and if used, a filler.
5.2.1 Fabric Tube—The fabric tube should consist of one or more layers of flexible needled felt, or equivalent, woven or
nonwoven material(s), or both, capable of carrying resin, withstanding installation pressures, and curing temperatures. The
material(s) of construction should be able to stretch to fit irregular pipe sections and negotiate bends. Longitudinal and
circumferential joints between multiple layers of fabric should be staggered so as not to overlap. The outside layer of the fabric
tube should have an impermeable flexible coating(s) whose function is to contain the resin during and after fabric tube
impregnation. The outer coating(s) must facilitate monitoring of resin saturation of the material(s) of construction of the fabric
tube. The fabric tube should be fabricated to a size that, when installed, will tightly fit the internal circumference and the length
of the original conduit. Allowance should be made for circumferential and longitudinal stretching of the fabric tube during
installation. As required, the fabric tube should meet minimum tensile strength requirements in the longitudinal and transverse
directions as specified in 7.1. All the material(s) of construction for the fabric tube should be compatible with the resin system used.
5.2.2 Calibration Hose:
5.2.2.1 Removable Calibration Hose—The removable calibration hose should consist of an impermeable plastic, or
impermeable plastic coating(s) on flexible woven or nonwoven material(s), or both, that do not absorb resin and are capable of
being removed from the CIPP.
5.2.2.2 Permanent Calibration Hose—The permanent calibration hose should consist of an impermeable plastic coating on a
flexible needled felt or equivalent woven or nonwoven material(s), or both, that are capable of absorbing resin and are of a
thickness to become fully saturated with resin. The calibration hose should be translucent to facilitate post-installation inspection.
The calibration hose should be fabricated to a size that, when installed, will tightly fit the internal circumference and the length
of the resin saturated fabric tube. Once inverted, the calibration hose becomes part of the fabric tube, and once properly cured,
should bond permanently with the fabric tube. The properties of the calibration hose should meet minimum tensile strength
requirements in the longitudinal and transverse directions as specified in 7.1. All the material(s) of construction for the calibration
hose should be compatible with the resin system used.
5.2.3 Resin—A chemically resistant isophthalic based polyester, or vinyl ester thermoset resin and catalyst system or an epoxy
resin and hardener that is compatible with the installation process should be used. The resin should be able to cure in the presence
of water and the initiation temperature for cure should be less than 180°F (82.2°C). The cured resin/fabric tube system, with or
without the calibration hose, shall be expected to have as a minimum the initial structural properties given in Table 1. These
physical properties should be determined in accordance with Section 8. The cured resin/fabric tube system, with or without the
calibration hose, should meet the minimum chemical resistance requirements as specified in 7.2.
6. Installation Recommendations
6.1 Cleaning and Pre-Inspection :
6.1.1 Prior to entering access areas, such as manholes, and performing inspection or cleaning operations, an evaluation of the
atmosphere to determine the presence of toxic or flammable vapors or lack of oxygen must be undertaken in accordance with local,
state, or federal safety regulations.
6.1.2 Cleaning of Pipeline—All internal debris should be removed from the original pipeline. Gravity pipes should be cleaned
with hydraulically powered equipment, high-velocity jet cleaners, or mechanically powered equipment in accordance with
NASSCO Recommended Specifications for Sewer Collection System Rehabilitation. Pressure pipelines should be cleaned with
cable attached devices or fluid propelled devices in accordance with AWWA M28.
6.1.3 Inspection of Pipelines—Inspection of pipelines should be performed by experienced personnel trained in locating breaks,
obstacles, and service connections by closed-circuit television or man entry. The interior of the pipeline should be carefully
inspected to determine the location of any conditions that may prevent proper installation of the impregnated tube, such as
protruding service taps, collapsed or crushed pipe, and reductions in the cross-sectional area of more than 40 %. These conditions
should be noted so that they can be corrected.
A
TABLE 1 CIPP Initial Structural Properties
Minimum Value
Property Test Method
psi (MPa)
Flexural strength D790 4 500 (31)
Flexural modulus D790 250 000 (1724)
Tensile strength D638 3 000 (21)
(for pressure pipes only)
A
The values in Table 1 are for field inspection. The purchaser should consult the
manufacturer for the long-term structural properties.
F1743 − 08 (2016)
6.1.4 Line Obstructions—The original pipeline should be clear of obstructions such as solids, dropped joints, protruding service
connections, crushed or collapsed pipe, and reductions in the cross-sectional area of more than 40 % that may hinder or prevent
the installation of the resin-impregnated fabric tube. If inspection reveals an obstruction that cannot be removed by conventional
sewer-cleaning equipment, then a point-repair excavation should be made to uncover and remove or repair the obstruction.
6.2 Resin Impregnation—The fabric tube should be totally impregnated with resin (wet-out) and run through a set of rollers
separated by a space, calibrated under controlled conditions to ensure proper distribution of resin. The volume of resin used should
be sufficient to fully saturate all the voids of the fabric tube material, as well as all resin-absorbing material of the calibration hose
at nominal thickness and diameter. The volume should be adjusted by adding 3 to 15 % excess resin to allow for the change in
resin volume due to polymerization, the change in resin volume due to thermal expansion or contraction, and resin migration
through the perforations of the fabric tube and out onto the host pipe.
6.3 Bypassing—If bypassing of the flow is required around the sections of pipe designated for reconstruction, the bypass should
be made by plugging the line at a point upstream of the pipe to be reconstructed and pumping the flow to a downstream point or
adjacent system. The pump and bypass lines should be of adequate capacity and size to handle the flow. Services within this reach
will be temporarily out of service.
6.3.1 Public advisory services shall notify all parties whose service laterals will be out of commission and advise against water
usage until the main line is back in service.
6.4 Installation Methods:
6.4.1 Perforation of Resin-Impregnated Tube—Prior to pulling the resin-impregnated fabric tube in place, the outer
impermeable plastic coating may optionally be perforated. When the resin-impregnated fabric tube is perforated, this should allow
resin to be forced through the perforations and out against the existing conduit by the force of the hydrostatic head or air pressure
against the inner wall of the calibration hose. The perforation should be done after fabric tube impregnation with a perforating
roller device at the point of manufacture or at the jobsite. Perforations should be made on both sides of the lay-flat fabric tube
covering the full circumference with a spacing no less than 1.5 in. (38.1 mm) apart. Perforating slits should be a minimum of 0.25
in. (6.4 mm) long.
6.4.2 Pulling Resin-Impregnated Tube into
...