EN ISO 11296-4:2011

SLOVENSKI STANDARD
01-december-2011
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Plastics piping systems for renovation of underground non-pressure drainage and
sewerage networks - Part 4: Lining with cured-in-place pipes (ISO 11296-4:2009,
corrected version 2010-06-01)
Kunststoff-Rohrleitungssysteme für die Renovierung von erdverlegten drucklosen
Entwässerungsnetzen (Freispiegelleitungen) - Teil 4: Vor Ort härtendes Schlauch-Lining
(ISO 11296-4:2009)
Systèmes de canalisations en matières plastiques pour la rénovation des réseaux
d'assainissement gravitaires enterrés - Partie 4: Tubage continu par tubes polymérisés
sur place (ISO 11296-4:2009, version corrigée 2010-06-01)
Ta slovenski standard je istoveten z: EN ISO 11296-4:2011
ICS:
23.040.20 Cevi iz polimernih materialov Plastics pipes
93.030 Zunanji sistemi za odpadno External sewage systems
vodo
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 11296-4
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2011
ICS 23.040.20; 23.040.45; 93.030; 91.140.80 Supersedes EN 13566-4:2002
English Version
Plastics piping systems for renovation of underground non-
pressure drainage and sewerage networks - Part 4: Lining with
cured-in-place pipes (ISO 11296-4:2009, corrected version
2010-06-01)
Systèmes de canalisations en plastique pour la rénovation Kunststoff-Rohrleitungssysteme für die Renovierung von
des réseaux de branchements et de collecteurs erdverlegten drucklosen Entwässerungsnetzen
d'assainissement enterrés sans pression - Partie 4: Tubage (Freispiegelleitungen) - Teil 4: Vor Ort härtendes Schlauch-
continu par tubes polymérisés sur place (ISO 11296- Lining (ISO 11296-4:2009)
4:2009, version corrigée 2010-06-01)
This European Standard was approved by CEN on 8 April 2011.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same
status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11296-4:2011: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
The text of ISO 11296-4:2009 has been prepared by Technical Committee ISO/TC 138 “Plastics pipes, fittings
and valves for the transport of fluids” of the International Organization for Standardization (ISO) and has been
taken over as EN ISO 11296-4:2011 by Technical Committee CEN/TC 155 “Plastics piping systems and
ducting systems” the secretariat of which is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by October 2011, and conflicting national standards shall be withdrawn at
the latest by October 2011.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 13566-4:2002.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 11296-4:2009 has been approved by CEN as a EN ISO 11296-4:2011 without any
modification.
INTERNATIONAL ISO
STANDARD 11296-4
First edition
2009-11-01
Corrected version
2010-06-01
Plastics piping systems for renovation
of underground non-pressure drainage
and sewerage networks —
Part 4:
Lining with cured-in-place pipes
Systèmes de canalisations en matières plastiques pour la rénovation
des réseaux d'assainissement gravitaires enterrés —
Partie 4: Tubage continu par tubes polymérisés sur place

Reference number
ISO 11296-4:2009(E)
©
ISO 2009
ISO 11296-4:2009(E)
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ii © ISO 2009 – All rights reserved

ISO 11296-4:2009(E)
Contents Page
Foreword .v
Introduction.vi
1 Scope.1
2 Normative references.1
3 Terms and definitions .2
3.1 General terms .2
3.2 Techniques.3
4 Symbols and abbreviated terms .4
4.1 Symbols.4
4.2 Abbreviated terms .5
5 Pipes at the “M” stage .5
5.1 Materials .6
5.2 General characteristics.7
5.3 Material characteristics.7
5.4 Geometric characteristics .8
5.5 Mechanical characteristics.8
5.6 Physical characteristics.8
5.7 Jointing.8
5.8 Marking.8
6 Fittings at the “M” stage.8
6.1 Materials .8
6.2 General characteristics.9
6.3 Material characteristics.9
6.4 Geometric characteristics .9
6.5 Mechanical characteristics.10
6.6 Physical characteristics.10
6.7 Jointing.10
6.8 Marking.10
7 Ancillary components.10
8 Fitness for purpose of the installed lining system at the “I” stage .10
8.1 Materials .10
8.2 General characteristics.10
8.3 Material characteristics.11
8.4 Geometric characteristics .11
8.5 Mechanical characteristics.11
8.6 Physical characteristics.13
8.7 Additional characteristics.13
8.8 Sampling.13
9 Installation practice.14
9.1 Preparatory work .14
9.2 Storage, handling and transport of pipe components .14
9.3 Equipment .14
9.4 Installation.15
9.5 Process-related inspection and testing .16
9.6 Lining termination .16
9.7 Reconnecting to existing manholes and laterals.16
9.8 Final inspection and testing.16
ISO 11296-4:2009(E)
9.9 Documentation.16
Annex A (informative) CIPP components and their functions.17
Annex B (normative) Cured-in-place pipes — Modifications to ISO 178 for flexural testing.18
Annex C (normative) Cured-in-place pipes — Test method for the determination of long-term
flexural modulus under wet conditions.25
Annex D (normative) Cured-in-place pipes — Determination of the creep factor under dry
conditions from a three-point flexural test .29
Bibliography .32

iv © ISO 2009 – All rights reserved

ISO 11296-4:2009(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 11296-4 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the
transport of fluids.
ISO 11296 consists of the following parts, under the general title Plastics piping systems for renovation of
underground non-pressure drainage and sewerage networks:
⎯ Part 1: General
⎯ Part 3: Lining with close-fit pipes
⎯ Part 4: Lining with cured-in-place pipes
Lining with continuous pipes is to form the subject of a part 2, lining with discrete pipes is to form the subject
of a part 5 and lining with spirally-wound pipes is to form the subject of a part 7.
This corrected version of ISO 11296-4:2009 incorporates the replacement of “ISO 178” with “ISO 178 as
modified by Annex B” in the fourth row and fifth column of Table 5.
ISO 11296-4:2009(E)
Introduction
The System Standard, of which this is part 4, specifies the requirements for plastics piping systems of various
materials used for renovation of existing pipelines in a specified application area. System Standards for
renovation specify procedures for the following applications:
⎯ plastics piping systems for renovation of underground non-pressure drainage and sewerage networks;
⎯ plastics piping systems for renovation of underground drainage and sewerage networks under pressure;
⎯ plastics piping systems for renovation of underground water supply networks;
⎯ plastics piping systems for renovation of underground gas supply networks.
These System Standards are distinguished from those for conventionally installed plastics piping systems
because they set requirements for certain characteristics in the as-installed condition, after site processing.
This is in addition to specifying requirements for plastics piping system components, as manufactured.
Each of the System Standards comprises a part 1 (general) and all applicable renovation technique family-
related parts from the following:
⎯ part 2: lining with continuous pipes;
⎯ part 3: lining with close-fit pipes;
⎯ part 4: lining with cured-in-place pipes;
⎯ part 5: lining with discrete pipes;
⎯ part 7: lining with spirally-wound pipes.
The requirements for any given renovation technique family are given in part 1, applied in conjunction with the
other relevant part. For example, parts 1 and 2 specify the requirements relating to lining with continuous
pipes. For complementary information, see ISO 11295. Not all technique families are applicable to every area
of application and this is reflected in the part numbers included in each System Standard.
A consistent structure of clause headings has been adopted for all parts to facilitate direct comparisons across
renovation technique families.
Figure 1 gives the common structure and the relationship between ISO 11296 and the System Standards for
other application areas.
vi © ISO 2009 – All rights reserved

ISO 11296-4:2009(E)
Figure 1 — Format of the renovation System Standards

INTERNATIONAL STANDARD ISO 11296-4:2009(E)

Plastics piping systems for renovation of underground
non-pressure drainage and sewerage networks —
Part 4:
Lining with cured-in-place pipes
1 Scope
This part of ISO 11296, in conjunction with ISO 11296-1, specifies requirements and test methods for cured-
in-place pipes and fittings used for the renovation of underground non-pressure drainage and sewerage
networks.
It applies to the use of various thermosetting resin systems, in combination with compatible fibrous carrier
materials and other process-related plastics components (see 5.1).
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 75-2, Plastics — Determination of temperature of deflection under load — Part 2: Plastics and ebonite
ISO 178:2001, Plastics — Determination of flexural properties
ISO 527-2, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and
extrusion plastics
ISO 899-2:2003, Plastics — Determination of creep behaviour — Part 2: Flexural creep by three-point loading
ISO 3126, Plastics piping systems — Plastics components — Determination of dimensions
ISO 4435, Plastics piping systems for non-pressure underground drainage and sewerage — Unplasticized
poly(vinyl chloride) (PVC-U)
ISO 7684, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes — Determination of
the creep factor under dry conditions
ISO 7685, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes — Determination of
initial specific ring stiffness
ISO 8513, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes — Determination of
longitudinal tensile properties
ISO 8773, Plastics piping systems for non-pressure underground drainage and sewerage — Polypropylene
(PP)
ISO 11296-4:2009(E)
1)
ISO 10928 , Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes and fittings —
Methods for regression analysis and their use
ISO 10952, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes and fittings —
Determination of the resistance to chemical attack for the inside of a section in a deflected condition
2)
ISO 11296-1:— , Plastics piping systems for renovation of underground non-pressure drainage and
sewerage networks — Part 1: General
ISO 13002, Carbon fibre — Designation system for filament yarns
3)
ISO 25780:— , Plastics piping systems for pressure and non-pressure water supply, irrigation, drainage or
sewerage — Glass-reinforced thermosetting plastics (GRP) systems based on unsaturated polyester (UP)
resin — Pipes with flexible joints intended to be installed using jacking techniques
EN 14364:2006, Plastics piping systems for drainage and sewerage with or without pressure — Glass-
reinforced thermosetting plastics (GRP) based on unsaturated polyester resin (UP) — Specifications for pipes,
fittings and joints
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 11296-1 and the following apply.
3.1 General terms
3.1.1
carrier material
porous component of the liner, which carries the liquid resin system during insertion into the pipe being
renovated and forms part of the installed lining system once the resin has been cured
3.1.2
CIPP product
cured-in-place pipe product
cured-in-place pipe of a particular design, produced from a liner of specified materials, with a wall structure
which is uniquely defined for each diameter/wall thickness combination, and which is impregnated with a
specific resin system and installed by a specific process
3.1.3
CIPP unit
specific cured-in-place pipe produced from a continuous liner, which has been impregnated in one process
and installed as a single length
3.1.4
close-fit
situation of the outside of the installed liner relative to the inside of the existing pipeline, which may either be
an interference fit or include a small annular gap resulting from shrinkage and tolerances only
3.1.5
composite
combination of cured resin system, carrier material and/or reinforcement, excluding any internal or external
membranes or any layer of excess neat resin

1) To be published.
2) To be published.
3) To be published.
2 © ISO 2009 – All rights reserved

ISO 11296-4:2009(E)
3.1.6
first break
elastic limit or first major discontinuity of the stress-strain curve associated with local failure of the resin matrix
or reinforcing fibres
3.1.7
curing
process of resin polymerization, which may be initiated or accelerated by the use of heat or exposure to light
3.1.8
design thickness
required wall thickness of the composite, as determined by structural design
3.1.9
internal membrane
membrane forming the inside surface of the pipe after installation
3.1.10
external membrane
membrane forming the outside surface of the pipe after installation
3.1.11
lateral connection collar
fitting for reconnecting a lined main pipe to an existing or renovated lateral pipe
3.1.12
lining tube
flexible tube, consisting of carrier material, resin system and any membranes and/or reinforcement, as
combined prior to insertion in the pipe to be lined
3.1.13
nominal thickness
one of a range of discrete liner wall thicknesses dictated by the materials used for liner construction and
chosen so as to result in a finished wall thickness of the composite not less than the design thickness
3.1.14
preliner
external membrane which is installed separately and before the resin-impregnated liner
3.1.15
reinforcement
fibres incorporated in the liner, which enhance the dimensional stability of the liner and/or the structural
properties of the cured composite
NOTE The reinforcement can be incorporated in the carrier material, constitute the carrier material, or can be a
separate layer.
3.1.16
resin system
thermosetting resin including the curing agent(s) and any fillers or other additives, in specified proportions
3.2 Techniques
3.2.1
inversion
process of turning a flexible tube or hose inside out by the use of fluid (water or air) pressure
ISO 11296-4:2009(E)
3.2.2
inverted-in-place insertion
method whereby the impregnated liner is introduced by inversion to achieve simultaneous insertion and
inflation
3.2.3
winched-in-place insertion
method whereby the flat impregnated liner is first pulled into the pipe to be lined and then inflated to bring it up
to size
NOTE Inflation can be achieved by means of a separate pressurized tube or hose inside the liner which is either
withdrawn after resin cure or left in place as a permanent internal membrane.
3.2.4
temporary membrane
internal membrane, used to separate process fluid (typically water or air) from the resin system during liner
insertion, which is withdrawn after resin cure
4 Symbols and abbreviated terms
The symbols and abbreviated terms given in ISO 11296-1 and the following apply.
4.1 Symbols
b width of test piece
E short-term flexural modulus
E long-term flexural modulus at x years
x
E flexural creep modulus at time t
t
F force applied in flexural test
h thickness of test piece
h mean thickness of test piece
m
I moment of inertia (the second moment of area) per unit length of the pipe wall
L distance between supports in flexural test
L distance between points of contact of curved flexural test piece with supports
L true span of curved flexural test piece
r radius of support
R radius of curvature of test piece at mid-thickness
V rise of centre of curved flexural test piece above its points of contact with supports
S initial specific ring stiffness
δ deflection of flexural test piece at time t
t
α dry creep factor at x years
x, dry
4 © ISO 2009 – All rights reserved

ISO 11296-4:2009(E)
ε initial flexural strain at zero stress

f0
ε flexural strain at first break

fb
ε flexural strain at maximum applied load

fM
σ required flexural stress in creep test

σ flexural stress at first break

fb
σ flexural stress at maximum applied load

fM
σ ultimate longitudinal tensile stress

l
4.2 Abbreviated terms
CIPP Cured-in-place pipe
EP Epoxy resin
GRP Glass-reinforced thermosetting plastics
PA Polyamide
PAN Polyacrylonitrile
PE Polyethylene
PEN Poly(ethylene naphthate)
PET Poly(ethylene terephthalate)
PP Polypropylene
PUR Polyurethane
PVC-U Unplasticized poly(vinyl chloride)
UP Unsaturated polyester resin
VE Vinyl ester resin
5 Pipes at the “M” stage
NOTE This clause specifies requirements for the lining tube (i.e. all components before resin cure). For requirements
for the cured composite, see Clause 8.
ISO 11296-4:2009(E)
5.1 Materials
Lining tubes shall comprise at least the following components:
⎯ resin system;
⎯ carrier material.
In addition, they may optionally comprise:
⎯ reinforcement;
⎯ internal membrane or temporary membrane;
⎯ external membrane.
For the relationship between these components, see Figure 2.
NOTE 1 Various components can have end-product or purely process-related functions dependent on the specific
method used. The possible functions of components are given in Table A.1.
NOTE 2 The carrier material can itself have a reinforcing effect.

Key
1 internal or temporary membrane
2 composite (resin in carrier material/reinforcement)
3 external membrane
4 existing pipeline
Figure 2 — Typical wall construction of lining tube
Lining tube components shall comprise materials conforming to Table 1 and the material used for each
component shall be declared.
6 © ISO 2009 – All rights reserved

ISO 11296-4:2009(E)
Table 1 — Classification of lining tube components by their material
Lining tube component Materials
Resin system:
⎯ resin type UP, VE or EP
⎯ filler type None, inorganic or organic
⎯ curing system Heat-initiated, light-initiated or ambient cure
Carrier material/reinforcement Polymeric fibres: PA, PAN, PEN, PET or PP
Glass fibres conforming to ISO 25780:—, 4.2.2
Carbon fibres of declared designation conforming to ISO 13002
a
Combinations of the above fibres
b
Membranes (internal, external or
Unrestricted
temporary)
a
Where a combination of fibres is used, the proportions by mass of each fibre type shall be declared to within 5 %.
b
As there are no requirements for membranes, there are also no restrictions on the choice of materials used for membranes.

5.2 General characteristics
Colouration may be used for resin mix and/or impregnation control.
5.3 Material characteristics
When tested in accordance with the methods given in Table 2, the resin system, cast singly without filler,
carrier material or reinforcement shall, after cure, conform to the material requirements specified in Table 2,
according to resin type.
Table 2 — Material characteristics of resin systems
Test parameter
Characteristic Requirement Test method
Parameter Value
Flexural stress at For UP and VE: W 100 MPa Speed of testing 2 mm/min ISO 178:2001
first break
For EP: W 80 MPa Number of test pieces 3
Dimensions of test piece:
thickness h 3 u h u 6 mm
width b (15 ± 0,5) mm
Tensile elongation For UP and VE: W 2 % Speed of testing 5 mm/min ISO 527-2
at break
For EP: W 2,5 % Number of test pieces 3
Test piece shape and initial Specimen type 1B
gauge length
Temperature of For UP and VE: W 85 °C Orientation of test piece Edgewise Method A of
deflection under ISO 75-2
For EP: W 70 °C Number of test pieces 3
load
ISO 11296-4:2009(E)
5.4 Geometric characteristics
No geometric requirements apply at the “M” stage.
The perimeter of the lining tube should be dimensioned such that when installed, it forms a close fit to the
existing sewer wall or as otherwise required by the design. The manufactured length and thickness of the
lining tube should include allowances for any longitudinal and circumferential stretch during installation.
5.5 Mechanical characteristics
No mechanical requirements apply at the “M” stage.
5.6 Physical characteristics
No physical requirements apply.
5.7 Jointing
The lining tube after impregnation shall be provided in lengths such that no jointing is required between points
of access to the sewer.
5.8 Marking
The marking shall conform to ISO 11296-1:—, 5.8. It shall be applied to the outside of the lining tube as
delivered to the installation site or in the case of pre-packaged lining tubes, on the outside of the packaging.
As specified in ISO 11296-1:—, 5.8 c), the dimensions marked shall be the nominal outside diameter or in the
case of lining tubes to be installed in non-circular sewers, the diameter of the circle having the same outside
perimeter as the lining tube.
As specified in ISO 11296-1:—, 5.8 d), the dimension marked shall be the wall thickness.
As specified in ISO 11296-1:—, 5.8 f), the manufacturer's information shall enable identification of the lining
tube structure and (if pre-impregnated) the resin system used.
6 Fittings at the “M” stage
NOTE 1 This clause describes the various materials which a cured-in-place fitting conforming to this part of ISO 11296
can comprise, and specifies requirements relating to those materials and intermediate fabrications at the “M” stage.
NOTE 2 Since by definition a cured-in-place pipe is partly manufactured on site, requirements of the finished product
can only be verified at the “I” stage. For “I” stage requirements, see Clause 8.
NOTE 3 The only cured-in-place fittings covered by this part of ISO 11296 are lateral connections collars. Such collars
can be an integral part of a complete lining of a lateral pipe. External saddle connections between cured-in-place main
pipes and lateral pipes can also be made with standard thermoplastic or GRP fittings.
6.1 Materials
Lateral connection collars shall comprise cured-in-place components conforming to 5.1, but may also include
additional thermoplastic components of declared composition.
External saddles shall be of PP, PVC-U or GRP-UP, conforming to ISO 4435, ISO 8773 or EN 14364:2006,
6.5, as applicable.
8 © ISO 2009 – All rights reserved

ISO 11296-4:2009(E)
6.2 General characteristics
No general requirements apply.
6.3 Material characteristics
The resin system of cured-in-place fittings shall conform to 5.3.
6.4 Geometric characteristics
Cured-in-place lateral connection collars shall be classified, as indicated in Table 3, according to the minimum
distance extended into the lateral pipe.
Table 3 — Classification of cured-in-place lateral connection collars
Class Minimum extension into lateral pipe
A 1 000 mm
B 400 mm and at least 150 mm beyond first joint in existing lateral pipe
C 100 mm
In addition, the rim of any cured-in-place lateral connection collar shall overlap the main pipe by not less than
50 mm (see Figure 3).
To avoid obstructions to flow and maintenance equipment, the transitions between the collar and both main
and lateral pipes should be smooth.
a)  Top-hat b)  Tee piece
Key
1 lateral pipe
2 main pipe
a
Extension of collar.
b
Rim of collar.
Figure 3 — Schematic of cured-in-place lateral connection collars
ISO 11296-4:2009(E)
6.5 Mechanical characteristics
No mechanical requirements apply to cured-in-place fittings at the “M” stage.
6.6 Physical characteristics
No physical requirements apply to cured-in-place fittings.
6.7 Jointing
Joints shall be either mechanical or adhesive.
6.8 Marking
The marking shall conform to ISO 11296-1:—, 6.8. It shall be applied to the outside of the lining tube as
delivered to the installation site or, in the case of pre-packaged lining tubes, on the outside of the packaging.
As specified in ISO 11296-1:—, 6.8 c), the dimension marked shall be the nominal outside diameter of the part
of the lateral connection collar which fits into the lateral pipe.
As specified in ISO 11296-1:—, 6.8 d), the dimension marked shall be the nominal wall thickness.
As specified in ISO 11296-1:—, 6.8 f), the manufacturer's information shall enable identification of the lining
tube structure and (if pre-impregnated) the resin system used.
7 Ancillary components
This part of ISO 11296 does not apply to any ancillary components.
8 Fitness for purpose of the installed lining system at the “I” stage
NOTE This clause includes the requirements for the finished CIPP system, the manufacture of which, by definition, is
not completed until the resin is cured at the “I” stage.
8.1 Materials
The pipe and any fittings may consist of different material components selected from the ranges defined in 5.1
and 6.1.
NOTE This part of ISO 11296 does not specify requirements for any end-product functions of internal membranes
(see Annex B).
8.2 General characteristics
In straight lengths of pipe of constant internal perimeter, the CIPP shall not introduce surface irregularities in
addition to those of the host pipe, which exceed 2 % of the nominal diameter or 6 mm, whichever is the
greater.
NOTE 1 This requirement can be changed, where appropriate, to meet hydraulic performance requirements of the
lined pipe.
NOTE 2 A feature of cured-in-place pipes is that they generally conform to the surface features of the host pipe. At
bends and at irregularities in the host pipe, including local reductions of internal perimeter, folding generally occurs.
10 © ISO 2009 – All rights reserved

ISO 11296-4:2009(E)
8.3 Material characteristics
Resin cure shall be demonstrated by conformity to 8.5.
8.4 Geometric characteristics
NOTE When assessing minimum free bore attainable after CIPP installation at bends, changes of cross-section or
stepped joints in the existing pipe, the likelihood of local folding can be taken into account (see 8.2).
8.4.1 CIPP wall structure
The thicknesses and relative positions of each component layer of the CIPP wall, including tolerances, shall
be specified as declared values. The maximum proportional volume of any entrained air and/or evolved gas
shall likewise be specified. The wall structure shall be verified by visual examination of the edge of a cut
section of pipe, with magnification, as necessary, and use of a scale or caliper capable of measuring to within
0,1 mm.
NOTE For the purposes of verifying that any entrained air and/or evolved gas does not exceed the declared
maximum proportional volume, microscopic examination of a thin section can be carried out. For uniform composites only,
measurement of test piece density can also provide a useful guide.
8.4.2 Wall thickness
When measured in a laboratory in accordance with the relevant test method specified, the wall thickness of
the installed pipe shall conform to the requirements of Table 4.
NOTE Wall thickness measured along the cut edge of the CIPP at manholes or lateral openings might not be
representative of the main body of the liner.
Table 4 — Geometric characteristics
Characteristic Requirement Test method
Mean wall thickness, e , of Not less than the design thickness
m
the composite
ISO 7685 (ring test pieces, see Table 5)
Minimum wall thickness, Not less than 80 % of the design or B.4.1 (flexural test pieces)
e , of the composite thickness, or 3 mm, whichever is the
min
a
greater
a
The e requirement does not apply to points where local wall thickness reduction is caused by irregularity in the host pipe.
min
8.5 Mechanical characteristics
When tested in accordance with the methods given in Table 5, the mechanical characteristics of pipe samples
taken from actual or simulated installations in accordance with 8.8 shall conform to this table.
NOTE The dry creep factor referred to in Table 5 is the inverse of the creep ratio for thermoplastics liner pipes
defined in ISO 11296-3. To compare the creep performance of CIPP with that of a thermoplastics liner pipe, an equivalent
creep ratio at x years for CIPP can be computed simply as 1/(α ).
x, dry
ISO 11296-4:2009(E)
Table 5 — Mechanical characteristics of pipes
Test parameters
Characteristic Requirement Test method
Parameter Value
a
Initial specific ring Declared value, but Number of test pieces 2 Method A or
stiffness, S not less than the Method B
Test piece length for:
greater of 0,25 kPa or of ISO 7685
d u 300 mm d mm ± 5 %
(0,125/α ) kPa
n n
50, dry
d > 300 mm 300 mm ± 5 %
n
Temperature (23 ± 2) °C
For method B: relative deflection (3 ± 0,5) %
b c
Dry creep factor , Declared value but not Method 1 (ring test) ISO 7684
α less than 0,2
x, dry
— number of test pieces 2
— test piece length for:
d u 300 mm d mm ± 5 %
n n
d > 300 mm
n 300 mm ± 5 %
— test period
10 000 h
— time to which values are to be
50 years
extrapolated
— temperature
(23 ± 2) °C
— relative humidity
(50 ± 5) %
c
Method 2 (3-point flexural test) Annex D
— number of test pieces 5
— sample orientation Shall conform to 8.8
— test period 10 000 h
— time to which values are to be
extrapolated 50 years (i.e. x = 50)
— temperature (23 ± 2) °C
— relative humidity (50 ± 5) %
Short-term flexural Declared value but not Number of test pieces 5 ISO 178 as
modulus, E less than 1 500 MPa modified by
Speed of testing 10 mm/min
Annex B
Flexural stress at first Declared value but not
Sample orientation Shall conform to 8.8
break, σ less than 25 MPa
fb
Temperature (23 ± 2) °C
Flexural strain at first Declared value but not
break, ε less than 0,75 %
fb
Long-term flexural Declared value but not Number of test pieces 5 Annex C
modulus under wet less than 300 MPa at
b
conditions , E 50 years
x, wet
Ultimate longitudinal Declared value but not Temperature (23 ± 2) °C Method A
a
tensile stress, σ less than 15 MPa  or Method B
l
of ISO 8513
Ultimate elongation Declared value but not Number of test pieces 5
less than 0,5 %
Speed of testing 5 mm/min
a
In case of dispute, Method A applies.
b
It is expected that only one of these methods of creep testing (dry or wet) will be applied, according to national preferences.
c
Where it is difficult to acquire a full ring for testing, Method 2 provides a practical alternative.

12 © ISO 2009 – All rights reserved

ISO 11296-4:2009(E)
8.6 Physical characteristics
No physical requirements apply.
8.7 Additional characteristics
When tested in accordance with the method given in Table 6, the resistance of the CIPP to chemical attack
under constant deflection (strain corrosion resistance) shall conform to the requirement stated in the table.
NOTE If th
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