prEN ISO 11300-4

SLOVENSKI STANDARD
01-januar-2026
Cevni sistemi za obnovo podzemnih odtokov, kanalizacije in vodovodnih omrežij -
4. del: Plastomerni kompozitni materiali (ISO/DIS 11300-4:2025)
Piping systems for rehabilitation of underground drains, sewers and water supply
networks - Part 4: Thermoplastic composite materials (ISO/DIS 11300-4:2025)
Rohrleitungssysteme für die Sanierung von unterirdischen Entwässerungs-,
Kanalisations- und Wasserversorgungsnetzen - Teil 4: Thermoplastische
Verbundwerkstoffe (ISO/DIS 11300-4:2025)
Systèmes de canalisations pour la réhabilitation des branchements, des collecteurs
d’assainissement et des réseaux d’alimentation en eau enterrés - Partie 4: Matériaux
composites thermoplastiques (ISO/DIS 11300-4:2025)
Ta slovenski standard je istoveten z: prEN ISO 11300-4
ICS:
23.040.05 Cevovodi za zunanje Pipeline and its parts for
sisteme za odpadno vodo in external sewage systems
njihovi deli
91.140.80 Drenažni sistemi Drainage systems
93.030 Zunanji sistemi za odpadno External sewage systems
vodo
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
International
Standard
ISO/DIS 11300-4
ISO/TC 138/SC 8
Piping systems for rehabilitation
Secretariat: JISC
of underground drains, sewers and
Voting begins on:
water supply networks —
2025-11-24
Part 4:
Voting terminates on:
2026-02-16
Thermoplastic composite materials
Systèmes de canalisations pour la réhabilitation des
branchements, des collecteurs d’assainissement et des réseaux
d’alimentation en eau enterrés —
Partie 4: Matériaux composites thermoplastiques
ICS: 23.040.05; 93.025; 93.030
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS.
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Reference number
ISO/DIS 11300-4:2025(en)
DRAFT
ISO/DIS 11300-4:2025(en)
International
Standard
ISO/DIS 11300-4
ISO/TC 138/SC 8
Piping systems for rehabilitation
Secretariat: JISC
of underground drains, sewers and
Voting begins on:
water supply networks —
Part 4:
Voting terminates on:
Thermoplastic composite materials
Systèmes de canalisations pour la réhabilitation des
branchements, des collecteurs d’assainissement et des réseaux
d’alimentation en eau enterrés —
Partie 4: Matériaux composites thermoplastiques
ICS: 23.040.05; 93.025; 93.030
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENTS AND APPROVAL. IT
IS THEREFORE SUBJECT TO CHANGE
AND MAY NOT BE REFERRED TO AS AN
INTERNATIONAL STANDARD UNTIL
PUBLISHED AS SUCH.
This document is circulated as received from the committee secretariat.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
© ISO 2025
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
STANDARDS MAY ON OCCASION HAVE TO
ISO/CEN PARALLEL PROCESSING
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
BE CONSIDERED IN THE LIGHT OF THEIR
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
or ISO’s member body in the country of the requester.
NATIONAL REGULATIONS.
ISO copyright office
RECIPIENTS OF THIS DRAFT ARE INVITED
CP 401 • Ch. de Blandonnet 8
TO SUBMIT, WITH THEIR COMMENTS,
CH-1214 Vernier, Geneva
NOTIFICATION OF ANY RELEVANT PATENT
Phone: +41 22 749 01 11
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION.
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/DIS 11300-4:2025(en)
ii
ISO/DIS 11300-4:2025(en)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 3
3.1 General .3
3.2 Terms related to techniques .4
3.3 Terms related to characteristics.6
3.4 Terms related to product stages .7
3.5 Terms related to materials .8
4 Symbols and abbreviated terms. 8
4.1 Symbols .8
4.2 Abbreviated terms .10
5 Pipes .10
5.1 Materials .10
5.2 General characteristics .10
5.3 Material characteristics .11
5.4 Geometric characteristics .11
5.5 Mechanical characteristics .11
5.6 Physical characteristics .11
5.7 Jointing.11
5.8 Marking .11
5.9 Regional requirements for pipes . 12
6 Fittings .12
6.1 General . 12
6.2 Fittings applied with SWO lining . 12
6.3 Fittings applied with RAPL . 13
6.3.1 General . 13
6.3.2 Materials . 13
6.3.3 Geometric characteristics . 13
6.4 Marking .14
6.5 Regional requirements for fittings . 15
7 Ancillary components .15
8 Fitness for purpose .15
8.1 Materials . 15
8.2 General characteristics . 15
8.3 Geometric characteristics . 15
8.4 Mechanical characteristics .16
8.5 Sampling .16
9 Installation practice .16
9.1 Preparatory work .16
9.2 Storage, handling and transport of pipes and fittings .16
9.3 Equipment .16
9.3.1 General .16
9.3.2 Inspection equipment .17
9.3.3 Lifting equipment .17
9.4 Installation .17
9.4.1 General .17
9.4.2 Safety precautions .18
9.4.3 Simulated installations .18
9.5 Process-related inspection and testing .18

iii
ISO/DIS 11300-4:2025(en)
9.6 Pipe end termination .18
9.7 Reconnection to the existing pipeline system .19
9.8 Final inspection and testing .19
9.9 Documentation .19
Annex A (normative) Additional requirements applicable for Lining with Spirally-wound pipes .20
Annex B (normative) Additional requirements applicable for Lining with a Rigidly anchored
plastics inner layer (RAPL) .25
Annex C (normative) Spirally-wound pipe — Test method for water tightness in a deflected
condition .35
Annex D (informative) Examples of methods for reconnecting laterals to a liner .38
Annex E (normative) Test method for anchoring strength of plastics inner layer by pull-off .40
Annex F (normative) “I” stage crushing strength test .46
Annex G (Informative) Summary of required elements to be included in installation manuals .48
Bibliography .49

iv
ISO/DIS 11300-4:2025(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on 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 pipeline 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).
This first edition of ISO 11300-4:2025, along with ISO 11301-1:2025, ISO 11300-2:2025 and ISO 11300-3:2025
cancels and replaces ISO 11296-1:2018, ISO 11296-7:2019, ISO 11296-9:2017, which have been technically
revised.
The main changes are as follows:
For piping systems made from thermoplastic composite materials, this document replaces the related
content, including requirements, of the documents listed above.
A list of all parts in the ISO 11300 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.

v
ISO/DIS 11300-4:2025(en)
Introduction
This document is a part of a series of International Standards concerning piping systems of various
materials used for the rehabilitation of existing pipelines in a specified application area. System Standards
for rehabilitation deal with the following applications:
— ISO 11300 series: Piping systems for rehabilitation of underground drains, sewers and water supply networks;
(this standard)
— ISO 11301 series: Piping systems for rehabilitation of underground gas supply networks.
The ISO 11300 series and the ISO 11301 series are subdivided into parts covering a specific material per
pipe system.
The ISO 11300 series is subdivided in four parts:
— Part 1: Polyethylene (PE) material
— Part 2: Thermoset composite materials;
— Part 3: PVC-U material;
— Part 4: Thermoplastic composite materials (this document).
Parts 3 and 4 are applicable for non-pressure drains and sewers networks only.
These documents cover various techniques for renovation and trenchless replacement. Furthermore, they
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 piping system components “as manufactured”.
A consistent structure of clause headings has been adopted for all parts of the ISO 11300 series and the
ISO 11301 series, in order to facilitate direct comparisons across renovation technique families.
Figure 1 shows the clause structure and the relationship between the ISO 11300 series and the ISO 11301 series.
For complementary information, see ISO 11295.
For assessment of conformity to the requirements of this document, see ISO/TS 23818-4 (in preparation).

vi
ISO/DIS 11300-4:2025(en)
a
In preparation.
Figure 1 — Clause structure of the ISO 11300 series and the ISO 11301 series
The various techniques for rehabilitation of underground drains, sewers and water supply networks,
within the scope of pipeline rehabilitation techniques generally, are shown schematically in Figure 2. For
definitions of standardized renovation techniques shown in Figure 2, but outside the scope of this document,
see ISO 11295.
vii
ISO/DIS 11300-4:2025(en)
a
This document is applicable.
Figure 2 — Technique families for rehabilitation of underground non-pressure drains, sewers
and water supply networks using thermoplastic composite pipes, within the scope of pipeline
rehabilitation techniques
viii
DRAFT International Standard ISO/DIS 11300-4:2025(en)
Piping systems for rehabilitation of underground drains,
sewers and water supply networks —
Part 4:
Thermoplastic composite materials
1 Scope
This document specifies requirements and test methods for pipes and fittings which are part of piping
systems for the rehabilitation, by means of renovation and trenchless replacement, of underground non-
pressure drains and sewers networks.
It is applicable to pipes, fittings and assemblies, made from thermoplastic composite materials, as
manufactured and as installed. It is not applicable to the existing pipeline.
It is applicable to the following technique families for renovation:
— lining with spirally-wound (SWO) pipes;
— lining with a rigidly anchored plastic inner layer (RAPL).
and intended to be used at a service temperature not exceeding 45 °C according to material as follows:
— PE: 20 °C as reference temperature;
— PVC-U: 23 °C as reference temperature;
in both cases with re-rating factors on mechanical characteristics for service temperatures in excess of
35 °C determined by dedicated type testing.
In the case of lining with SWO pipes, where the pipes, are formed on site, to a fixed or variable diameter, by
spirally winding and jointing a pre-manufactured profiled plastics strip, this document applies to, strips
made of unplasticized poly(vinyl chloride) (PVC U), or of polyethylene (PE), with or without steel stiffening
elements, and installed with or without integral locking mechanism.
In the case of lining with RAPL, where a single rigid annulus of structural cementitious grout is formed
behind a plastics inner layer serving as permanent formwork anchored to the grout. This document applies
to integrally joined profiled plastics strips of PVC-U or PE or studded sheets of PE, and grout systems with or
without steel reinforcement. It does not apply to the structural design of the lining system.
NOTE Systems with multiple annuli are available, but these are controlled by patent rights and not covered by
this document.
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 37, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
ISO 48-4, Rubber, vulcanized or thermoplastic — Determination of hardness — Part 4: Indentation hardness by
durometer method (Shore hardness)

ISO/DIS 11300-4:2025(en)
ISO 75-2:2013, Plastics — Determination of temperature of deflection under load — Part 2: Plastics and ebonite
ISO 179-1, Plastics — Determination of Charpy impact properties — Part 1: Non-instrumented impact test
ISO 306, Plastics — Thermoplastic materials — Determination of Vicat softening temperature (VST)
ISO 527-1, Plastics — Determination of tensile properties — Part 1: General principles
ISO 527-2, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and extrusion
plastics
ISO 630-1, Structural steels — Part 1: General technical delivery conditions for hot-rolled products
ISO 630-2, Structural steels — Part 2: Technical delivery conditions for structural steels for general purposes
ISO 1133-1, Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of
thermoplastics — Part 1: Standard method
ISO 1133-2, Plastics — Determination of the melt mass-flow rate (MFR) and melt volume-flow rate (MVR) of
thermoplastics — Part 2: Method for materials sensitive to time-temperature history and/or moisture
ISO 1183-1, Plastics — Methods for determining the density of non-cellular plastics — Part 1: Immersion method,
liquid pycnometer method and titration method
ISO 4427-3, Plastics piping systems for water supply, and for drainage and sewerage under pressure —
Polyethylene (PE) — Part 3: Fittings
ISO 4435, Plastics piping systems for non-pressure underground drainage and sewerage — Unplasticized
poly(vinyl chloride) (PVC-U)
ISO 4624:2016, Paints and varnishes — Pull-off test for adhesion
ISO 4948-2, Steels — Classification — Part 2: Classification of unalloyed and alloy steels according to main
quality classes and main property or application characteristics
ISO 6259-1, Thermoplastics pipes — Determination of tensile properties — Part 1: General test method
ISO 6935 (all parts), — Steel for the reinforcement of concrete
ISO 7619-1, Rubber, vulcanized or thermoplastic — Determination of indentation hardness — Part 1: Durometer
method (Shore hardness)
ISO 9967, Thermoplastics pipes — Determination of creep ratio
ISO 9969, Thermoplastics pipes — Determination of ring stiffness
ISO 10467:2018, Plastics piping systems for pressure and non-pressure drainage and sewerage — Glass-
reinforced thermosetting plastics (GRP) systems based on unsaturated polyester (UP) resin
ISO 11357-6, Plastics — Differential scanning calorimetry (DSC) — Part 6: Determination of oxidation induction
time (isothermal OIT) and oxidation induction temperature (dynamic OIT)
ISO 12162, Thermoplastics materials for pipes and fittings for pressure applications — Classification, designation
and design coefficient
ISO 13262, Thermoplastics piping systems for non-pressure underground drainage and sewerage —
Thermoplastics spirally-formed structured-wall pipes — Determination of the tensile strength of a seam
ISO 18373-1:2007, Rigid PVC pipes — Differential scanning calorimetry (DSC) method — Part 1: Measurement
of the processing temperature
EN 196-1, Methods of testing cement — Part 1: Determination of strength
EN 445:2007, Grout for prestressing tendons — Test methods

ISO/DIS 11300-4:2025(en)
EN 1015-3, Methods of test for mortar for masonry — Part 3: Determination of consistence of fresh mortar (by
flow table)
EN 1015-6, Methods of test for mortar for masonry — Part 6: Determination of bulk density of fresh mortar
EN 1107-2, Flexible sheets for waterproofing — Determination of dimensional stability — Part 2: Plastic and
rubber sheets for roof waterproofing
CEN/TS 1401-2, Plastics piping systems for non-pressure underground drainage and sewerage – Unplasticized
poly(vinyl chloride) (PVC-U) – Part 2: Guidance for the assessment of conformity
CEN/ENV 1401-3, Plastics piping systems for non-pressure underground drainage and sewerage – Unplasticized
poly(vinyl chloride) (PVC-U) – Part 3: Guidance for installation
EN 1542:1999, Products and systems for the protection and repair of concrete structures — Test methods —
Measurement of bond strength by pull-off
EN 1610:2015, Construction and testing of drains and sewers
EN 1916:2002, Concrete pipes and fittings, unreinforced, steel fibre and reinforced
EN 10025-1, Hot rolled products of structural steels — Part 1: General technical delivery conditions
EN 10025-2, Hot rolled products of structural steels — Part 2: Technical delivery conditions for non-alloy
structural steels
EN 12814-2, Testing of welded joints of thermoplastics semi-finished products — Part 2: Tensile test
EN 12814-8, Testing of welded joints of thermoplastics semi-finished products — Part 8: Requirements
EN 13067, Plastics welding personnel - Qualification testing of welders — Thermoplastics welded assemblies
EN 13100-4, Non-destructive testing of welded joints of thermoplastics semi-finished products — Part 4: High
voltage testing
EN 13412:2006, Products and systems for the protection and repair of concrete structures — Test methods —
Determination of modulus of elasticity in compression
EN 14117, Products systems for the protection and repair of concrete structures — Test methods —
Determination of time of efflux of cementitious injection products
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 11295 and the following apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
3.1 General
3.1.1
characteristic
property, dimension or other feature of a material or component
[SOURCE: 11300-1:2025, 3.1.1]
ISO/DIS 11300-4:2025(en)
3.1.2
declared value
limiting value of a characteristic declared in advance by the rehabilitation systemsupplier (3.1.4), which
becomes the requirement for the purposes of assessment of conformity
[SOURCE: 11300-1:2025, 3.1.2]
3.1.3
grouting
process of filling voids around the lining system
3.1.4
rehabilitation system supplier
entity that specifies the field and range of application and brings together the components of a rehabilitation
system to meet the requirements of the product standard at the “M” stage (3.4.1), so that when installed
in accordance with the installation manual they meet the requirements of the product standard at the “I”
stage (3.4.2)
[SOURCE: 11300-1:2025, 3.1.5]
3.1.5
system installer
entity that prepares the host pipe, takes the rehabilitation system at the “M” stage (3.4.1) and installs it so
that it is at the “I” stage (3.4.2)
[SOURCE: 11300-1:2025, 3.1.6]
3.1.6
type testing
testing performed to prove that a material, component, joint or assembly is capable of conforming to the
requirements given in the applicable standard
[SOURCE: 11300-1:2025, 3.1.7]
3.2 Terms related to techniques
3.2.1
lining with spirally-wound pipes
lining with a profiled strip, spirally wound to form a continuous pipe after installation
[SOURCE: ISO 11295:2025, 3.2.10]
3.2.2
lining with a rigidly anchored plastics inner layer
lining with pipe comprising a single rigid annulus of structural cementitious grout and a plastics inner layer
anchored to the grout
3.2.3
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
[SOURCE: ISO 11295:2025, 3.2.26]
3.2.4
close-fit spirally-wound pipe
continuous lining pipe wound from a profiled plastics strip, with or without steel reinforcement, expanded
or wound in place to achieve a close fit to the existing pipeline

ISO/DIS 11300-4:2025(en)
3.2.5
spirally-wound pipe
pipe formed by continuously winding and joining a profiled plastics strip, or a profiled plastics strip and
integral locking joiner strip
3.2.6
anchored plastics inner layer
layer with integral anchors which forms the inside surface of the pipe after installation
3.2.7
profiled plastics strip
extruded profile of unplasticized poly(vinyl chloride) (PVC-U) or polyethylene (PE), with integral or separate
seam (3.2.9) locking mechanism, used to form the waterway wall of a pipe liner
3.2.8
joiner strip
extruded profile of PVC-U or PE used to connect adjacent profiled plastic strips
3.2.9
seam
joint between adjacent profiled plastics strips formed by an integral locking mechanism and/or seam sealant
3.2.10
integral locking mechanism
mechanical interlock achieved by suitable design of the edges of the extruded profile
3.2.11
seam sealant
thermoplastic or adhesive material added to the integral locking mechanism (3.2.10), joiner strip (3.2.8) or
profiled plastics strip (3.2.7) surface to make the seam (3.2.9) leaktight
3.2.12
studded PE sheet
polyethylene sheet with integral anchoring studs
3.2.13
lateral connection collar
fitting for reconnecting a lined main pipe to an existing or renovated lateral pipe
3.2.14
annular space
gap between the plastics inner layer and either the host pipe or the external layer where present
3.2.15
reinforcement
steel bars incorporated in the grout or steel stiffening elements placed alongside or encapsulated within the
plastics inner layer
3.2.16
grout system
cement-based grout including any fillers, reinforcement (3.2.15) or other additives or admixtures, in specified
proportions
3.2.17
spacer
block of material compatible with grout system (3.2.16) used to maintain minimum thickness of annular
space (3.2.14) and prevent flotation of inner plastics layer during filling with grout

ISO/DIS 11300-4:2025(en)
3.3 Terms related to characteristics
3.3.1
nominal size
DN
numerical designation of the size of a component related to the inside or outside diameter
Note 1 to entry: It is a convenient round number approximately equal to the manufacturing dimension in millimetres
(mm). It is not applicable to components designated by thread size.
[SOURCE: ISO 4427-1:2019, 3.1.1, modified to include inside diameter as option]
3.3.2
nominal size
DN/OD
nominal size, related to the outside diameter
[SOURCE: ISO 4427-1:2019, 3.1.1]
3.3.3
nominal outside diameter
d
n
specified outside diameter, in millimetres, assigned to a nominal size DN/OD
Note 1 to entry: For thermoplastics solid-wall components, the value of nominal outside diameter is identical to the
minimum mean outside diameter, d , defined in 3.3.5.
em,min
[SOURCE: ISO 4427-1:2019, 3.1.2, modified by addition of Note 1 to entry.]
3.3.4
mean outside diameter
d
em
value of the measurement of the outer circumference of the pipe or spigot end of a fitting in any cross-section
divided by π (= 3,142) and rounded to the next greater 0,1 mm
[SOURCE: ISO 4427-1:2019, 3.1.4]
3.3.5
minimum mean outside diameter
d
em,min
minimum value of the mean outside diameter as specified for a given nominal size
[SOURCE: ISO 4427-1:2019, 3.1.5]
3.3.6
wall thickness
e
value of the measurement of the wall thickness at any point around the circumference of a component
3.3.7
mean wall thickness
e
m
arithmetic mean of a number of measurements of the wall thickness, regularly spaced around the
circumference and in the same cross-section of a component, including the measure minimum and the
maximum measured values of the wall thickness in that cross-section
[SOURCE: ISO 4427-1:2019, 3.1.12]

ISO/DIS 11300-4:2025(en)
3.3.8
minimum wall thickness at any point
e
min
minimum value of the wall thickness at any point around the circumference of a component, as specified
[SOURCE: ISO 4427-1:2019, 3.1.10]
3.3.9
nominal wall thickness
e
n
numerical designation of the wall thickness of a component, which is a convenient round number,
approximately equal to the manufacturing dimension in millimetres (mm)
Note 1 to entry: For thermoplastics components conforming to ISO 4435 or the different parts of the ISO 4427 series,
the value of nominal wall thickness, e , is identical to the specified minimum wall thickness at any point, e .
n min
[SOURCE: ISO 4427-1:2019, 3.1.8, with modified Note 1 to entry]
3.3.10
standard dimension ratio
SDR
numerical designation of a pipe series, which is a convenient round number, approximately equal to the
dimension ratio of the nominal outside diameter, d , and the nominal wall thickness, e
n n
[SOURCE: ISO 4427-1:2019, 3.1.14]
3.3.11
ring stiffness
resistance of a pipe to diametric deflection in response to external loading applied along one longitudinal
diametric plane
Note 1 to entry: This definition applies to both long and short-term values.
[SOURCE: ISO 11300-1:2025, 3.3.12]
3.3.12
integral joint
joint at the pipe end, either by means of a socket at one pipe end (single-socket pipe) or matching joint parts
integrated in the pipe wall at either end of the pipe (rubber ring joints or screwed joints).
[SOURCE: ISO 11300-1:2025, 3.7.5]
3.4 Terms related to product stages
3.4.1
“M” stage
stage as manufactured, before any subsequent site processing of components associated with the particular
renovation technique
Note 1 to entry: For pipes and fittings at the “M” stage, see Clauses 5 and 6, respectively.
[SOURCE: ISO 11300-1:2025, 3.4.1]
3.4.2
“I” stage
stage as installed, i.e. in final configuration after any site processing of components associated with the
particular renovation technique
Note 1 to entry: For pipes and fittings at the “I” stage, see Clause 8.
[SOURCE: ISO 11300-1:2025, 3.4.2]

ISO/DIS 11300-4:2025(en)
3.5 Terms related to materials
3.5.1
virgin material
material in a form such as granules, powder or liquid, which has not been subjected to use or processing other
than that required for its manufacture and to which no reprocessable or recyclable material has been added
[SOURCE: ISO 11300-1:2025, 3.5.1]
3.5.2
own reprocessable material
material prepared from clean, rejected and unused pipes, fittings, or valves, including trimmings from the
production of pipes, fittings or valves, that is reprocessed in a manufacturer’s plant after having previously
been processed by the same manufacture in the production of a component by, for example, injection
moulding or extrusion
[SOURCE: ISO 4427-1:2019, 3.2.2]
3.5.3
recyclable material
material prepared from used products which have been cleaned and crushed or ground
[SOURCE: ISO 11300-1:2025, 3.5.4]
4 Symbols and abbreviated terms
4.1 Symbols
A unit cross-sectional area of the profiled plastics strip
w
b width of air test channel
c
D mean diameter of the dolly
d outside diameter
e
d maximum outside diameter of inner plastics layer in circular pipes
e,max
d minimum outside diameter of inner plastics layer in circular pipes
e,min
d mean outside diameter
em
d minimum mean outside diameter
em,min
d original circular outside diameter of the pipe (before processing for insertion)
manuf
d nominal outside diameter
n
e wall thickness
e height of neutral axis of the strip above its base
a
e thickness of grout above height of anchors
g
e minimum thickness of grout above height of anchors
g,min
e mean wall thickness
m
e minimum wall thickness at any point
min
ISO/DIS 11300-4:2025(en)
e nominal wall thickness
n
e height of neutral axis of the profile plastics strip above its base
a
e overall profile height
o
e waterway wall thickness at any point
w
e encapsulation thickness at any point
e encapsulation thickness at any point
F effective crushing test result
a
F failure load
h
F ultimate (collapse) load
u
f bending tensile stress from crushing strength
bt
f anchoring strength of plastics inner layer
h
f short-term tensile welding factor
s
I second moment of area of the profiled plastics strip
w
l length of the sample for short-term tensile force resistance test of the locked seam
s
R compressive strength after 28 days
c,28
R flexural strength after 28 days
f,28
r radius
r minimum local radius of curvature of inner plastics layer in cross section of non-circular pipe
e,min
r mean cross-sectional radius of the RAPL system
m
S ring stiffness of the pipe
s regular stud spacing
s maximum stud spacing in vicinity of seam
max
T temperature at which stress rupture data have been determined
t time to occurrence of a leak in the pipe
t wall thickness
t mean measured wall thickness at the crown of the pipe
act
σ quantity with the dimensions of stress, which represents the 97,5 % lower confidence limit of
LPL
the predicted hydrostatic strength at a temperature, T, and time t
w effective width of the profiled plastics strip
w width of the sample for short-term tensile force resistance test of the locked seam
ñ
X minimum extension into lateral pipe
X' additional manufactured length of lateral extension required to cover thickness of RAPL liner

ISO/DIS 11300-4:2025(en)
Y minimum extension of rim into
...