SIST EN ISO 11298-4:2021

Plastics piping systems for renovation of underground water supply networks - Part 4: Lining with cured-in-place pipes (ISO 11298-4:2021)

This document, in conjunction with ISO 11298‑1, specifies requirements and test methods for cured-in-place pipes and fittings used for the renovation of water supply networks, which transport water intended for human consumption, including raw water intake pipelines.
It applies to independent (fully structural, class A) and interactive (semi structural, class B) pressure pipe liners, as defined in ISO 11295, which do not rely on adhesion to the existing pipeline. It applies to the use of various thermosetting resin systems, in combination with compatible fibrous carrier materials, reinforcement, and other process-related plastics components (see 5.1).
It does not include requirements or test methods for resistance to cyclic loading or the pressure rating of CIPP liners where passing through bends, which are outside the scope of this document.
It is applicable to cured-in-place pipe lining systems intended to be used at a service temperature of up to 25 °C.
NOTE   For applications operating at service temperatures greater than 25 °C, guidance on re-rating factors can be supplied by the system supplier.

Kunststoff-Rohrleitungssysteme für die Renovierung von erdverlegten Wasserversorgungsnetzen - Teil 4: Vor Ort härtendes Schlauchlining (ISO 11298-4:2021)

Dieses Dokument legt in Zusammenhang mit ISO 11298 1 Anforderungen und Prüfverfahren für vor Ort härtende Schlauch-Liner und Schlauch-Lining-Formstücke für die Renovierung von Wasserversorgungs¬netzen für die Durchleitung von Wasser für den menschlichen Gebrauch, einschließlich Rohwasser-Entnahmeleitungen, fest.
Es gilt für unabhängige (vollständig statisch belastbar, Klasse A) und interaktive (semi-statisch belastbar, Klasse B) Druckleitungs-Liner nach der Definition in ISO 11295, die nicht von der Verklebung mit der vorhandenen Rohrleitung abhängen. Es gilt für die Verwendung verschiedener härtender Harzsysteme (Duroplaste) in Kombination mit kompatiblen, faserigen Trägermaterialien, Verstärkung, und anderen zum Verfahren gehörenden Kunststoffelementen (siehe 5.1).
Es enthält keine Anforderungen oder Prüfverfahren zur Bestimmung des Widerstands gegen dynamische Einwirkungen oder die Druckfestigkeit von CIPP-Linern bei der Führung durch Bögen. Diese liegen außerhalb des Anwendungsbereiches dieses Dokuments.
Es gilt für vor Ort härtende Schlauch-Lining-Systeme für den Einsatz bei einer Betriebstemperatur von bis zu 25 °C.
ANMERKUNG   Für Anwendungen mit Betriebstemperaturen größer als 25 °C kann der Systemlieferant Hinweise zu Druckminderungsfaktoren geben.

Systèmes de canalisation en plastique pour la rénovation des réseaux enterrés d’alimentation en eau - Partie 4: Tubage continu par tubes polymérisés sur place (ISO 11298-4:2021)

Le présent document, conjointement avec l’ISO 11298‑1, spécifie les exigences et les méthodes d’essai pour les tubes et raccords polymérisés sur place utilisés pour la rénovation des réseaux d’alimentation en eau qui transportent de l’eau destiné à la consommation humaine, y compris les conduites de prise d'eau brute.
Il s’applique aux tubages autostructurants (entièrement structurants de classe A) et aux tubages non autostructurants (semi-structurants de classe B), tels que définis dans l’ISO 11295, qui ne nécessitent pas une adhérence à la canalisation existante. Il couvre l’utilisation de divers systèmes de résine thermodurcissable, en combinaison avec des matrices fibreuses compatibles, des renforts et d’autres composants plastiques liés aux procédés (voir 5.1).
Il ne comprend pas les exigences ou les méthodes d’essai pour la résistance aux charges cycliques ou la pression nominale des tubages CIPP lorsqu'ils passent par des coudes, qui sont en dehors du domaine d’application du présent document.
Il s’applique aux systèmes de tubage par tube polymérisé sur place destinés à être utilisés à une température de service allant jusqu’à 25 °C.
NOTE   Pour les applications fonctionnant à des températures de service supérieures à 25 °C, le fournisseur du système peut fournir des indications sur les facteurs de réévaluation.

Cevni sistemi iz polimernih materialov za obnovo podzemnih omrežij za oskrbo z vodo - 4. del: Oblaganje s cevmi, utrjenimi na mestu vgradnje (ISO 11298-4:2021)

General Information

• Status: Published
• Public Enquiry End Date: 04-Sep-2019
• Publication Date: 03-Jun-2021
• ICS: 23.040.03 - Pipeline and its parts for external water conveyance systems
• ICS: 93.025 - External water conveyance systems
• Technical Committee: PCV - Plastic pipes, fittings and valves
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 24-May-2021
• Due Date: 29-Jul-2021
• Completion Date: 04-Jun-2021
• Ref Project: EN ISO 11298-4:2021 - Plastics piping systems for renovation of underground water supply networks - Part 4: Lining with cured-in-place pipes (ISO 11298-4:2021)

Relations

• Revised: oSIST prEN ISO 11300-2:2025 - Piping systems for rehabilitation of underground drains, sewers and water supply networks - Part 2: Thermoset composite materials (ISO/DIS 11300-2:2025)
• Effective Date: 08-Apr-2024

Standards Content (Sample)

SLOVENSKI STANDARD
01-julij-2021
Cevni sistemi iz polimernih materialov za obnovo podzemnih omrežij za oskrbo z
vodo - 4. del: Oblaganje s cevmi, utrjenimi na mestu vgradnje (ISO 11298-4:2021)
Plastics piping systems for renovation of underground water supply networks - Part 4:
Lining with cured-in-place pipes (ISO 11298-4:2021)
Kunststoff-Rohrleitungssysteme für die Renovierung von erdverlegten
Wasserversorgungsnetzen - Teil 4: Vor Ort härtendes Schlauchlining (ISO 11298-4:2021)
Systèmes de canalisation en plastique pour la rénovation des réseaux enterrés
d’alimentation en eau - Partie 4: Tubage continu par tubes polymérisés sur place (ISO
11298-4:2021)
Ta slovenski standard je istoveten z: EN ISO 11298-4:2021
ICS:
23.040.03 Cevovodi za zunanje sisteme Pipeline and its parts for
transporta vode in njihovi deli external water conveyance
systems
93.025 Zunanji sistemi za prevajanje External water conveyance
vode systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 11298-4
EUROPEAN STANDARD
NORME EUROPÉENNE
April 2021
EUROPÄISCHE NORM
ICS 23.040.20; 23.040.45; 93.025
English Version
Plastics piping systems for renovation of underground
water supply networks - Part 4: Lining with cured-in-place
pipes (ISO 11298-4:2021)
Systèmes de canalisation en plastique pour la Kunststoff-Rohrleitungssysteme für die Renovierung
rénovation des réseaux enterrés d'alimentation en eau von erdverlegten Wasserversorgungsnetzen - Teil 4:
- Partie 4: Tubage continu par tubes polymérisés sur Vor Ort härtendes Schlauchlining (ISO 11298-4:2021)
place (ISO 11298-4:2021)
This European Standard was approved by CEN on 18 March 2021.

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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 11298-4:2021 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 11298-4:2021) has been prepared by Technical Committee ISO/TC 138
"Plastics pipes, fittings and valves for the transport of fluids" in collaboration with 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 2021, and conflicting national standards shall
be withdrawn at the latest by October 2021.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
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, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 11298-4:2021 has been approved by CEN as EN ISO 11298-4:2021 without any
modification.
INTERNATIONAL ISO
STANDARD 11298-4
First edition
2021-03
Plastics piping systems for renovation
of underground water supply
networks —
Part 4:
Lining with cured-in-place pipes
Systèmes de canalisation en plastique pour la rénovation des réseaux
enterrés d’alimentation en eau —
Partie 4: Tubage continu par tubes polymérisés sur place
Reference number
ISO 11298-4:2021(E)
©
ISO 2021
ISO 11298-4:2021(E)
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii © ISO 2021 – All rights reserved

ISO 11298-4:2021(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 . 4
3.3 Characteristics . 4
3.4 Materials . 5
3.5 Product stages . 5
3.6 Service conditions . 5
4 Symbols and abbreviated terms . 5
4.1 Symbols . 5
4.2 Abbreviated terms . 7
5 Pipes at the “M” stage . 7
5.1 Materials . 7
5.2 General characteristics . 9
5.3 Material characteristics . 9
5.4 Geometric characteristics . 9
5.5 Mechanical characteristics.10
5.6 Physical characteristics .10
5.7 Jointing .10
5.8 Marking .10
6 Fittings at the “M” stage .10
7 Ancillary components .10
8 Fitness for purpose of the installed lining system at the “I” stage .11
8.1 Materials .11
8.2 General characteristics .11
8.3 Material characteristics .11
8.4 Geometric characteristics .12
8.4.1 General.12
8.4.2 CIPP wall structure .12
8.4.3 Wall thickness .12
8.5 Mechanical characteristics.12
8.5.1 Reference conditions for testing .12
8.5.2 Test requirements .12
8.6 Physical characteristics .16
8.7 Additional characteristics .16
8.7.1 Leak tightness of liner terminations .16
8.8 Sampling .17
9 Installation practice .17
9.1 Preparatory work .17
9.2 Storage, handling and transport of pipe components .17
9.3 Equipment .17
9.4 Installation .18
9.4.1 Environmental precautions .18
9.4.2 Installation procedures .18
9.4.3 Simulated installations .18
9.5 Process-related inspection and testing .19
9.6 Lining termination .19
9.7 Reconnections to existing pipeline system .19
ISO 11298-4:2021(E)
9.8 Final inspection and testing .19
9.9 Documentation .19
Annex A (informative) CIPP components and their functions .20
Annex B (normative) Cured-in-place pipes — Determination of short-term flexural properties .21
Annex C (normative) Cured-in-place pipes — Determinationof long-term flexural modulus
under dry or wet conditions .31
Annex D (normative) Cured-in-place pipes — Determination of long-term flexural strength
under dry or wet conditions .36
Bibliography .39
iv © ISO 2021 – All rights reserved

ISO 11298-4:2021(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves
for the transport of fluids, Subcommittee SC 8, Rehabilitation of pipelines systems, in collaboration with
the European Committee for Standardization (CEN) Technical Committee CEN/TC 155, Plastics piping
systems and ducting systems, in accordance with the Agreement on technical cooperation between ISO
and CEN (Vienna Agreement).
A list of all parts in the ISO 11298 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
ISO 11298-4:2021(E)
Introduction
This document is a part of a system standard for plastics piping systems of various materials used for
renovation of existing pipelines in a specified application area. System standards for renovation dealing
with the following applications are either available or under preparation:
— the ISO 11296 series, Plastics piping systems for renovation of underground non-pressure drainage and
sewerage networks;
— the ISO 11297 series, Plastics piping systems for renovation of underground drainage and sewerage
networks under pressure;
— the ISO 11298 series, Plastics piping systems for renovation of underground water supply networks
(including this document);
— the ISO 11299 series, Plastics piping systems for renovation of underground gas supply networks.
These system standards are distinguished from those for conventionally installed plastics piping
systems by the requirement to verify certain characteristics in the “as-installed” condition, after site
processing. This is in addition to specifying requirements for plastics piping systems components “as
manufactured”.
Each of the system standards comprises a:
— Part 1: General
and all applicable renovation technique family-related parts, which for water supply networks include
or potentially include the following:
— Part 2: Lining with continuous pipes;
— Part 3: Lining with close-fit pipes;
— Part 4: Lining with cured-in-place pipes (this document);
— Part 5: Lining with discrete pipes;
— Part 6: Lining with adhesive-backed hoses;
— Part 10: Lining with sprayed polymeric materials;
— Part 11: Lining with inserted hoses.
The requirements for any given renovation technique family are specified in Part 1, applied in
conjunction with the other relevant part. For example, ISO 11298-1 and this document together specify
the requirements relating to lining with cured-in-place pipes. For complementary information, see
ISO 11295. Not all technique families are pertinent 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 of ISO 11298 to facilitate direct
comparisons across renovation technique families.
Figure 1 shows the common part and clause structure and the relationship between the ISO 11298
series and the system standards for other application areas.
vi © ISO 2021 – All rights reserved

ISO 11298-4:2021(E)
Figure 1 — Format of the renovation system standards
INTERNATIONAL STANDARD ISO 11298-4:2021(E)
Plastics piping systems for renovation of underground
water supply networks —
Part 4:
Lining with cured-in-place pipes
1 Scope
This document, in conjunction with ISO 11298-1, specifies requirements and test methods for cured-
in-place pipes and fittings used for the renovation of water supply networks, which transport water
intended for human consumption, including raw water intake pipelines.
It applies to independent (fully structural, class A) and interactive (semi structural, class B) pressure
pipe liners, as defined in ISO 11295, which do not rely on adhesion to the existing pipeline. It applies
to the use of various thermosetting resin systems, in combination with compatible fibrous carrier
materials, reinforcement, and other process-related plastics components (see 5.1).
It does not include requirements or test methods for resistance to cyclic loading or the pressure rating
of CIPP liners where passing through bends, which are outside the scope of this document.
It is applicable to cured-in-place pipe lining systems intended to be used at a service temperature of up
to 25 °C.
NOTE For applications operating at service temperatures greater than 25 °C, guidance on re-rating factors
can be supplied by the system supplier.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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 75-2:2013, Plastics — Determination of temperature of deflection under load — Part 2: Plastics
and ebonite
ISO 178:2019, Plastics — Determination of flexural properties
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 7432, Glass-reinforced thermosetting plastics (GRP) pipes and fittings — Test methods to prove the
design of locked socket-and-spigot joints, including double-socket joints, with elastomeric seals
ISO 7509, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes — Determination
of time to failure under sustained internal pressure
ISO 7685:2019, Glass-reinforced thermosetting plastics (GRP) pipes — Determination of initial ring stiffness
ISO 8513:2016, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes — Test
methods for the determination of the initial longitudinal tensile strength
ISO 8521:2020, Glass-reinforced thermosetting plastic (GRP) pipes — Test methods for the determination
of the initial circumferential tensile wall strength
ISO 11298-4:2021(E)
ISO 8533, Glass-reinforced thermosetting plastics (GRP) pipes and fittings — Test methods to prove the
design of cemented or wrapped joints
ISO 10468, Glass-reinforced thermosetting plastics (GRP) pipes — Determination of the ring creep
properties under wet or dry conditions
ISO 10639:2017, Plastics piping systems for pressure and non-pressure water supply — Glass-reinforced
thermosetting plastics (GRP) systems based on unsaturated polyester (UP) resin
ISO 10928:2016, Plastics piping systems — Glass-reinforced thermosetting plastics (GRP) pipes and
fittings — Methods for regression analysis and their use
ISO 11295:2017, Classification and information on design and applications of plastics piping systems used
for renovation and replacement
ISO 11298-1:2018, Plastics piping systems for renovation of underground water supply networks —
Part 1: General
ISO 13002, Carbon fibre — Designation system for filament yarns
ISO 14125:1998, Fibre-reinforced plastic composites — Determination of flexural properties
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 11298-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1 General terms
3.1.1
carrier material
porous component of the lining tube (3.1.8), which carries the liquid resin system (3.1.14) 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 of a particular design, produced from a lining tube (3.1.8) 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 (3.1.14) and installed by a specific process
3.1.3
close fit
situation of the outside of the installed liner relative to the inside of the existing pipeline, which can
either be an interference fit or include a small annular gap resulting from shrinkage and tolerances only
3.1.4
composite
combination of cured resin system (3.1.14), carrier material (3.1.1) and/or reinforcement (3.1.13),
excluding any internal or external membranes
3.1.5
curing
process of resin polymerization, which can be initiated or accelerated by the use of heat or exposure
to light
2 © ISO 2021 – All rights reserved

ISO 11298-4:2021(E)
3.1.6
design thickness
required wall thickness of the composite (3.1.4), excluding any abrasion layer, as determined by
structural design
3.1.7
first break
elastic limit or first major discontinuity of the stress-strain curve associated with local failure of the
resin matrix or reinforcing fibres
3.1.8
lining tube
flexible tube, consisting of carrier material (3.1.1), resin system (3.1.14) and any membranes and/or
reinforcement (3.1.13), as combined prior to insertion in the pipe to be lined
3.1.9
nominal CIPP “M” stage wall thickness
one of a range of discrete lining tube (3.1.8) wall thicknesses dictated by the sum of the thicknesses of
the individual layers of materials used for tube construction at the “M” stage, excluding any internal or
external membranes
Note 1 to entry: This term is expressed using the symbol e (see 4.1).
n,M
3.1.10
nominal CIPP “I” stage wall thickness
one of a range of discrete CIPP product (3.1.2) wall thicknesses at the “I” stage, dictated by the sum of
the thicknesses of the individual layers of materials used for lining tube (3.1.8) construction, excluding
any internal or external membranes
Note 1 to entry: This term is expressed using the symbol e (see 4.1).
n,I
3.1.11
permanent membrane
internal or external membrane designed to retain its integrity through the processes of lining tube
(3.1.8) insertion and resin system (3.1.14) cure, and to provide functions for the operational life of the
CIPP liner
3.1.12
preliner
permanent or semi-permanent external membrane which is installed separately, before insertion of the
resin-impregnated lining tube (3.1.8)
3.1.13
reinforcement
fibres incorporated in the lining tube (3.1.8), which enhance the dimensional stability of the lining tube
and/or the structural properties of the cured composite (3.1.4)
Note 1 to entry: The reinforcement can be incorporated in the carrier material (3.1.1), constitute the carrier
material, or can be a separate layer.
3.1.14
resin system
thermosetting resin including the curing agent(s) and any fillers or other additives, in specified
proportions
3.1.15
semi-permanent membrane
internal or external membrane designed to retain its integrity through the processes of lining tube
(3.1.8) insertion and resin system (3.1.14) cure, but not relied on to retain its integrity at the “I” stage
ISO 11298-4:2021(E)
3.1.16
service temperature
maximum sustained temperature at which a system is expected to operate
Note 1 to entry: Service temperature is expressed in degrees Celsius (°C).
3.1.17
temporary membrane
membrane forming the internal or external surface of the pipe at the “M” stage, with functions at
the “M” stage only, removed during or after installation
3.1.18
total thickness
thickness of cured-in-place pipe (CIPP) at the "I" stage comprising the composite (3.1.4) and any semi-
permanent (3.1.15) and permanent membranes (3.1.11)
3.1.19
type testing
testing performed to prove that the material, product, joint or assembly is capable of conforming to the
requirements given in the relevant standard
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
3.2.2
inverted-in-place insertion
method whereby the impregnated lining tube (3.1.8) is introduced by inversion (3.2.1) to achieve
simultaneous insertion and inflation
3.2.3
winched-in-place insertion
method whereby the flat impregnated lining tube (3.1.8) is first pulled into the pipe to be lined and then
inflated to bring it up to size
Note 1 to entry: With some techniques, inflation is achieved by inversion (3.2.1) through the pulled-in lining
tube of a separate impregnated tube or dry hose, which is either withdrawn after resin cure or left in place as a
permanent internal membrane.
3.3 Characteristics
3.3.1
projected failure pressure at 50 years
value at 50 years derived from the pressure regression line obtained from long-term pressure tests
performed in accordance with ISO 7509 and analysed in accordance with ISO 10928
Note 1 to entry: This term is expressed using the symbol p (see 4.1).
[SOURCE: ISO 10639:2017, 3.12.10 — modified.]
3.3.2
minimum failure pressure at 50 years
95% lower confidence level (LCL) of the failure pressure at 50 years
Note 1 to entry: This term is expressed using the symbol p (see 4.1).
50,min
[SOURCE: ISO 10639:2017, 3.12.7 — modified.]
4 © ISO 2021 – All rights reserved

ISO 11298-4:2021(E)
3.4 Materials
No additional definitions apply.
3.5 Product stages
No additional definitions apply.
3.6 Service conditions
3.6.1
PN
nominal pressure
alphanumeric designation for a nominal pressure class, which is the maximum sustained hydraulic
internal pressure for which a pipe is designed in the absence of other loading conditions than internal
pressure
2 5 2
Note 1 to entry: Nominal pressure is expressed in bars (i.e. 1 bar = 0,1 MPa = 0,1 N/mm = 10 ⋅N/m ).
Note 2 to entry: The designation for reference or marking purposes consists of the letters PN plus a number.
[SOURCE: ISO 10639:2017, 3.12.2, modified — the last part of the definition has been deleted for
simplification.]
4 Symbols and abbreviated terms
4.1 Symbols
b width of test piece
C Correction factor on 3-point flexural modulus for curvature of test piece
E
C Correction factor on 3-point flexural stress for curvature of test piece
σ
d inside diameter
i
d mean diameter of pipe sample at mid-thickness of the composite (= 2R )
m 2
d nominal outside diameter
n
E short-term flexural modulus
E apparent flexural modulus of curved 3-point bend test piece, before correction for curvature
c
E apparent flexural modulus of flat 3-point bend test piece
f
E long-term flexural modulus at x years
x
E flexural creep modulus at time t
t
EI section bending stiffness per unit length of the pipe wall
EI apparent section bending stiffness of curved 3-point test piece before correction for curvature
c
e thickness of internal membrane
e thickness of external membrane
e thickness of the composite
c
ISO 11298-4:2021(E)
e total thickness
tot
e mean thickness of the composite
c,m
e minimum thickness of the composite
c.min
e nominal CIPP “I” stage wall thickness
n,I
e nominal CIPP “M” stage wall thickness
n,M
F force applied in flexural test
h total thickness of test piece
h mean total 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 the composite in a curved flexural test piece
L total chord length of curved flexural test piece
M section moment capacity per unit length of the pipe wall
M apparent section moment capacity of curved 3-point test piece before correction for curvature
c
p projected failure pressure at 50 years
p minimum failure pressure at 50 years
50,min
r radius of support
R radius of curvature of test piece at mid-thickness of the composite
R radius of curvature of inside surface of test piece
V rise of centre of curved flexural test piece above its points of contact with supports
s deflection measured in flexural test
s deflection of flexural test piece at time t
t
S initial specific ring stiffness
t elapsed time in long-term test
x time to which long-term test results are extrapolated for design purposes
α creep factor at x years
x
ε apparent flexural strain in curved 3-point bend test piece, before correction for curvature
c
ε initial flexural strain at zero stress
f0
ε flexural strain at first break
fb
ε flexural strain at maximum applied load
fM
6 © ISO 2021 – All rights reserved

ISO 11298-4:2021(E)
σ required flexural stress in creep test
σ apparent flexural stress in curved 3-point bend test piece, before correction for curvature
c
σ flexural stress in flat 3-point bend test piece
f
σ flexural stress at first break
fb
σ flexural stress at maximum applied load
fM
σ ultimate longitudinal tensile stress
L
σ long-term flexural strength at x years
x
ϕ half-angle of arc of a 3-point bend test piece between its points of contact with the supports
4.2 Abbreviated terms
CIPP cured-in-place pipe
EP epoxy resin
GRP glass-reinforced thermosetting plastics
LCL lower confidence limit
PA polyamide
PAN polyacrylonitrile
PE polyethylene
PEN poly(ethylene naphthate)
PET poly(ethylene terephthalate)
PFA allowable operating pressure
PN nominal pressure
PP polypropylene
PPTA poly(p-phenylene terephthalamide)
UP unsaturated polyester resin
VE vinyl ester resin
5 Pipes at the “M” stage
5.1 Materials
NOTE 1 This clause specifies requirements for the lining tube (i.e. all components before resin cure).
Requirements for the cured composite are specified in Clause 8.
Lining tubes shall comprise at least the following components:
— resin system;
— carrier material.
ISO 11298-4:2021(E)
In addition, they may optionally comprise:
— reinforcement;
— internal membrane (permanent, semi-permanent or temporary);
— external membrane (permanent, semi-permanent or temporary).
For the relationship between these components, see Figure 2.
NOTE 2 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 3 The carrier material can itself have a reinforcing effect.
Key
1 internal membrane
2 composite (resin in carrier material/reinforcement, including any abrasion layer)
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.
8 © ISO 2021 – All rights reserved

ISO 11298-4:2021(E)
Table 1 — Materials for lining tube components
Lining tube component Materials
a
Resin system: UP, VE or EP
— resin type
None, inorganic or organic
Heat-initiated, light-initiated or ambient cure
— filler type
— curing agent type
Carrier material/reinforcement Polymeric fibres: PA, PAN, PEN, PET, PP or PPTA aramid
Glass fibres of types ‘E’, ‘C’, 'R' and/or ‘E-CR’ conforming to ISO 10639
Carbon fibres of declared designation conforming to ISO 13002
b
Combinations of the above fibres
c
Membranes Unrestricted
a
Other resin systems are current state of the art and, although excluded from the scope, can in principle be tested in
accordance with this document.
b
Where a combination of fibres is used, the proportions by mass of each fibre type shall be declared to within 5 %.
c
As there are no requirements for membranes, there are also no restrictions on the choice of thermoplastic materials
used for membranes.
5.2 General characteristics
Colouration may be used for resin mix and/or impregnation control, subject to any restrictions on
choice of colour as specified in ISO 11298-1.
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.
Table 2 — Material characteristics of resin systems
Test parameter
Characteristic Requirement Test method
Parameter Value
Temperature of de- ≥ 45 °C Orientation of test piece Edgewise ISO 75-2:2013,
flection under load Method A
Number of test pieces 3
5.4 Geometric characteristics
Where the manufacturer elects to mark the lining tube with nominal CIPP “M” stage wall thickness (see
5.8) the thickness of the lining tube shall be measured by a method documented in the manufacturer’s
quality plan. The thicknesses of any membranes shall be deducted.
The total nominal CIPP “M” stage wall thickness may be determined as the sum of the similarly
measured thicknesses of individual layers of material.
NOTE 1 Such measurement is possible only where the lining tube is marked before impregnation with the
resin system.
NOTE 2 The “I” stage wall thickness achieved (see 8.4.3) depends not only on the “M” stage thickness, but
also on the volume, rheology and curing characteristics of the resin system used, the internal dimensions and
condition of the pipe to be lined, and details of the installation process applied.
Where the manufacturer elects to mark the lining tube with nominal CIPP “I” stage wall thickness
(see 5.8) this thickness shall represent the minimum mean composite thickness (e ), achieved when
c,m
ISO 11298-4:2021(E)
the lining tube is installed by a prescribed process in a circular pipe of internal diameter equal to the
declared nominal outside diameter, d , of the lining tube.
n
In all cases, 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
There can be technique- and/or project-specific strength and stiffness requirements for installation of
the lining tube, see 9.4.2.
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 water pipeline.
5.8 Marking
The marking shall conform to ISO 11298-1:2018, 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.
For conformance with ISO 11298-1:2018, 5.8 c), the dimension marked shall be the nominal outside
diameter.
For conformance with ISO 11298-1:2018, 5.8 d), the dimension marked shall be either the nominal
CIPP “M” stage wall thickness, e , or nominal CIPP “I” stage wall thickness, e , making clear which is
n,M n,I
intended.
For conformance with ISO 11298-1:2018, 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
GRP flange adapters used for end connections to class A and class B liners shall conform to the
requirements of ISO 10639.
NOTE 1 This clause specifies fittings of plastics materials applicable to connecting and sealing the CIPP liner
to the network. Metallic fittings principally comprising metallic components and elastomeric seals are specified
in Clause 7, tests on pipe-fitting assemblies are covered in Clause 8, and system-related installation procedures,
for example, for making load-bearing and non-load bearing end connections, are covered in Clause 9.
NOTE 2 Attention is drawn to the distinct end-sealing requirements for interactive (class B) and independent
(class A) pressure pipe line
...