SIST EN ISO 21003-2:2009

SLOVENSKI STANDARD
SIST EN ISO 21003-2:2009
01-januar-2009
9HþVORMQLFHYQLVLVWHPL]DQDSHOMDYH]YURþRLQKODGQRYRGRYVWDYEDKGHO&HYL
,62
Multilayer piping systems for hot and cold water installations inside buildings - Part 2:
Pipes (ISO 21003-2:2008)
Mehrschichtverbund-Rohrleitungssysteme für die Warm- und Kaltwasserinstallation
innerhalb von Gebäuden - Teil 2: Rohre (ISO 21003-2:2008)
Systemes de canalisations multicouches pour installations d'eau chaude et froide a
l'intérieur des bâtiments - Partie 2: Tubes (ISO 21003-2:2008)
Ta slovenski standard je istoveten z: EN ISO 21003-2:2008
ICS:
23.040.20 Cevi iz polimernih materialov Plastics pipes
91.140.60 Sistemi za oskrbo z vodo Water supply systems
SIST EN ISO 21003-2:2009 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 21003-2:2009

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SIST EN ISO 21003-2:2009
EUROPEAN STANDARD
EN ISO 21003-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
July 2008
ICS 91.140.60; 23.040.20

English Version
Multilayer piping systems for hot and cold water installations
inside buildings - Part 2: Pipes (ISO 21003-2:2008)
Systèmes de canalisations multicouches pour installations Mehrschichtverbund-Rohrleitungssysteme für die Warm-
d'eau chaude et froide à l'intérieur des bâtiments - Partie 2: und Kaltwasserinstallation innerhalb von Gebäuden - Teil 2:
Tubes (ISO 21003-2:2008) Rohre (ISO 21003-2:2008)
This European Standard was approved by CEN on 15 June 2008.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, 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: rue de Stassart, 36  B-1050 Brussels
© 2008 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21003-2:2008: E
worldwide for CEN national Members.

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SIST EN ISO 21003-2:2009
EN ISO 21003-2:2008 (E)
Contents Page
Foreword.3

2

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SIST EN ISO 21003-2:2009
EN ISO 21003-2:2008 (E)
Foreword
This document (EN ISO 21003-2:2008) 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 January 2009, and conflicting national standards shall be withdrawn at
the latest by January 2009.
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 has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EC Directive(s).
For relationship with EC Directive(s), see informative Annex ZA, B, C or D, which is an integral part of this
document.
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, 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 21003-2:2008 has been approved by CEN as a EN ISO 21003-2:2008 without any
modification.

3

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SIST EN ISO 21003-2:2009

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SIST EN ISO 21003-2:2009

INTERNATIONAL ISO
STANDARD 21003-2
First edition
2008-07-01


Multilayer piping systems for hot and
cold water installations inside
buildings —
Part 2:
Pipes
Systèmes de canalisations multicouches pour installations d'eau
chaude et froide à l'intérieur des bâtiments —
Partie 2: Tubes





Reference number
ISO 21003-2:2008(E)
©
ISO 2008

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SIST EN ISO 21003-2:2009
ISO 21003-2:2008(E)
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©  ISO 2008
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ii © ISO 2008 – All rights reserved

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SIST EN ISO 21003-2:2009
ISO 21003-2:2008(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 2
3 Terms and definitions. 3
4 Symbols and abbreviated terms . 3
5 Material . 3
5.1 General. 3
5.2 Processable materials. 3
5.3 Influence on water intended for human consumption. 3
6 General characteristics . 3
6.1 Appearance . 3
6.2 Opacity. 3
7 Construction. 4
8 Geometrical characteristics. 4
8.1 General. 4
8.2 Dimensions of pipes. 4
9 Pressure strength . 4
9.1 Long-term pressure strength (p ). 4
LPL
9.2 Design pressure strength (p ). 4
D
10 Thermal durability. 5
10.1 Thermal durability of P-pipes . 5
10.2 Thermal durability of M-pipes. 5
11 Strength of the weld line of M-pipes. 5
12 Delamination . 5
12.1 Multilayer P-pipes . 5
12.2 Multilayer M-pipes. 5
13 Oxygen permeability. 6
14 Physical and chemical characteristics. 6
15 Performance requirements . 6
16 Marking . 6
16.1 General requirements. 6
16.2 Minimum required marking. 7
Annex A (normative) List of reference product standards . 8
Annex B (normative) Design coefficients for multilayer pipes. 9
Annex C (normative) Determination of the thermal durability of the outer layer of M-pipes from
resistance to cracking after oven ageing. 10
Annex D (normative) Determination of the thermal durability of the outer layer of M-pipes from
the elongation at break after 50 years . 12
Annex E (normative) Multilayer M-pipes — Choice of p and the use of Miner's rule. 14
D
Bibliography . 18

© ISO 2008 – All rights reserved iii

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SIST EN ISO 21003-2:2009
ISO 21003-2:2008(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 21003-2 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the
transport of fluids, Subcommittee SC 2, Plastics pipes and fittings for water supplies.
ISO 21003 consists of the following parts, under the general title Multilayer piping systems for hot and cold
water installations inside buildings:
⎯ Part 1: General
⎯ Part 2: Pipes
⎯ Part 3: Fittings
⎯ Part 5: Fitness for purpose of the system
⎯ Part 7: Guidance for the assessment of conformity [Technical Specification]
NOTE ISO 21003 does not include a Part 4: Ancillary equipment, or a Part 6: Guidance for installation.
iv © ISO 2008 – All rights reserved

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SIST EN ISO 21003-2:2009
ISO 21003-2:2008(E)
Introduction
The system standard of which this is Part 2 specifies the requirements for a multilayer piping system.
The multilayer piping system is intended to be used for hot and cold water installations inside buildings.
In respect of potentially adverse effects on the quality of water intended for human consumption caused by the
products covered by ISO 21003:
⎯ no information is provided as to whether the products may be used without restriction in any of the
member states of the EU or EFTA;
⎯ it should be noted that, while awaiting the adoption of verifiable European criteria, existing national
regulations concerning the use and/or the characteristics of these products remain in force.
Requirements and test methods for material and components other than pipes are specified in ISO 21003-1
and ISO 21003-3. Characteristics relating to fitness for purpose (mainly for joints) are covered in ISO 21003-5.
ISO/TS 21003-7 gives guidance on the assessment of conformity.
This part of ISO 21003 specifies the characteristics of pipes.
Other system standards which, at the date of publication of this part of ISO 21003, had been published for
plastics piping systems used for the same application are listed in Annex A.

© ISO 2008 – All rights reserved v

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SIST EN ISO 21003-2:2009

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SIST EN ISO 21003-2:2009
INTERNATIONAL STANDARD ISO 21003-2:2008(E)

Multilayer piping systems for hot and cold water installations
inside buildings —
Part 2:
Pipes
1 Scope
This part of ISO 21003 specifies the characteristics of pipes for multilayer piping systems intended to be used
for hot and cold water installations inside buildings for the conveyance of water — whether or not the water is
intended for human consumption (domestic systems) or heating systems — under specified design pressures
and temperatures appropriate to the class of application (see Table 1 of ISO 21003-1:2008).
It also specifies the test parameters for the test methods referred to in this part of ISO 21003.
ISO 21003 is a reference product standard. It is applicable to multilayer pipes, fittings, their joints, and also to
joints with components made of other plastics and non-plastics materials intended to be used for hot and cold
water installations. This part of ISO 21003 is intended for use only in conjunction with all the other parts of
ISO 21003.
ISO 21003 covers a range of service conditions (application classes) and design pressures. It is not applicable
for values of design temperature, T , maximum design temperature, T , and malfunction temperature, T ,
D max mal
in excess of those in Table 1 of ISO 21003-1:2008.
NOTE 1 It is the responsibility of the purchaser or specifier to make the appropriate selections from these aspects,
taking into account their particular requirements and any relevant national regulations and installation practices or codes.
The polymeric materials used for the stress-designed layers are the following: polybutylene (PB), polyethylene
of raised temperature resistance (PE-RT), crosslinked polyethylene (PE-X), polypropylene (PP) and
chlorinated poly(vinyl chloride) (PVC-C).
The PE-X used shall be fully crosslinked and shall comply with the requirements of the relevant reference
product standard (ISO 15875).
NOTE 2 For the purposes of ISO 21003, crosslinked polyethylene (PE-X) as well as adhesives are considered as
thermoplastic materials.
Solid-wall pipes with thin outer layers (applied as protection layers or barrier layers, for instance) are not
covered by ISO 21003 but are specified in the Amendments to ISO 15874-2, ISO 15875-2 and ISO 15876-2.
The total thickness of such outer layers, including the thickness of the adhesives used, shall be u 0,4 mm.
© ISO 2008 – All rights reserved 1

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SIST EN ISO 21003-2:2009
ISO 21003-2:2008(E)
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 161-1, Thermoplastics pipes for the conveyance of fluids — Nominal outside diameters and nominal
pressures — Part 1: Metric series
ISO 527-1:1993, Plastics — Determination of tensile properties — Part 1: General principles
ISO 527-2:1993, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and
extrusion plastics
ISO 2578:1993, Plastics — Determination of time-temperature limits after prolonged exposure to heat
ISO 3126, Plastics piping systems — Plastics components — Determination of dimensions
ISO 6259-1:1997, Thermoplastics pipes — Determination of tensile properties — Part 1: General test method
ISO 7686, Plastics pipes and fittings — Determination of opacity
ISO 9080, Plastics piping and ducting systems — Determination of the long-term hydrostatic strength of
thermoplastics material in pipe form by extrapolation
ISO 10508, Plastics piping systems for hot and cold water installations — Guidance for classification and
design
ISO 13760, Plastics pipes for the conveyance of fluids under pressure — Miner's rule — Calculation method
for cumulative damage
ISO 15874-2, Plastics piping systems for hot and cold water installations — Polypropylene (PP) —
Part 2: Pipes
ISO 15875-2, Plastics piping systems for hot and cold water installations — Crosslinked polyethylene
(PE-X) — Part 2: Pipes
ISO 15876-2, Plastics piping systems for hot and cold water installations — Polybutylene (PB) —
Part 2: Pipes
ISO 15877-2, Plastics piping systems for hot and cold water installations — Chlorinated poly(vinyl chloride)
(PVC-C) — Part 2: Pipes
ISO 17454, Plastics piping systems — Multilayer pipes — Test method for the adhesion of the different layers
using a pulling rig
ISO 17455, Plastics piping systems — Multilayer pipes — Determination of the oxygen permeability of the
barrier pipe
ISO 17456, Plastics piping systems — Multilayer pipes —Determination of long-term strength
ISO 21003-1:2008, Multilayer piping systems for hot and cold water installations inside buildings — Part 1:
General
ISO 21003-5:2008, Multilayer piping systems for hot and cold water installations inside buildings — Part 5:
Fitness for purpose of the system
2 © ISO 2008 – All rights reserved

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SIST EN ISO 21003-2:2009
ISO 21003-2:2008(E)
1)
ISO 22391-2:— , Plastics piping systems for hot and cold water installations — Polyethylene of raised
temperature resistance (PE-RT) — Part 2: Pipes
EN 713, Plastics piping systems — Mechanical joints between fittings and polyolefin pressure pipes — Test
method for leaktightness under internal pressure of assemblies subjected to bending
EN 12293, Plastics piping systems — Thermoplastics pipes and fittings for hot and cold water — Test method
for the resistance of mounted assemblies to temperature cycling
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 21003-1 apply.
4 Symbols and abbreviated terms
For the purposes of this document, the symbols and abbreviated terms given in ISO 21003-1 apply.
5 Material
5.1 General
The pipe manufacturer shall declare the materials used for each layer of the multilayer pipe and the function of
each layer.
The material characteristics of the stress-designed layers shall comply with the requirements of the relevant
reference product standards (see Annex A).
5.2 Processable materials
Clean own reprocessable material which is the same as the virgin material may be added to that virgin
material. External reprocessable material shall not be used.
5.3 Influence on water intended for human consumption
All materials of the multilayer piping system, when in contact with water which is intended for human
consumption, shall not affect the quality of the drinking water and shall be in compliance with national
regulations.
6 General characteristics
6.1 Appearance
When viewed without magnification, the internal and external surfaces of pipes shall be smooth, clean and
free from any scoring, cavities and other surface defects that would prevent conformance with this part of
ISO 21003. The material shall contain no visible impurities. Slight variations in colour are permitted. The ends
of each pipe shall be cut cleanly and square to the axis of the pipe.
6.2 Opacity
Multilayer pipes that are declared to be opaque shall not transmit more than 0,2 % of visible light, when tested
in accordance with ISO 7686. This requirement is not relevant to M-pipes.

1) To be published. (Revision of ISO 22391-2:2007)
© ISO 2008 – All rights reserved 3

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SIST EN ISO 21003-2:2009
ISO 21003-2:2008(E)
7 Construction
Multilayer pipes can include layers made of polymer or layers made of metal.
For example, layers may have the following purposes:
⎯ the ability to withstand pressure;
⎯ the ability to block or greatly reduce the permeation of oxygen or other substances through the pipe wall;
⎯ the ability to create interlayer adhesion;
⎯ the ability to block or greatly diminish the effect of UV and/or sunlight;
⎯ the ability to mechanically protect all other layers (inside layer or outside layer);
⎯ the ability to control the longitudinal expansion;
⎯ the ability to give the multilayer pipe a colour (inside layer or outside layer).
Some characteristics can be combined in the same layer.
For P-type pipes, the pressure strength can be determined in accordance with procedure I or procedure II
(see Clause 9). In cases of dispute, procedure II shall be used. For M-type pipes, the pressure strength can
only be determined in accordance with procedure II.
8 Geometrical characteristics
8.1 General
Dimensions of multilayer pipes shall be measured in accordance with ISO 3126.
8.2 Dimensions of pipes
The outside diameter should preferably be in accordance with ISO 161-1.
The pipe manufacturer shall give detailed information related to the geometrical characteristics, including the
wall thickness, with tolerances for each layer, in a technical file. All layers shall be of sufficient thickness to
meet the requirements of this part of ISO 21003.
9 Pressure strength
9.1 Long-term pressure strength (p )
LPL
The long-term pressure strength of multilayer pipes can be measured (procedure II) or calculated
(procedure I), as defined in ISO 17456. Procedure I can only be used for multilayer P-pipes and validation
testing shall be carried out at a minimum temperature of T given in ISO 21003-1:2008, Table 1, for
max
t = 8 760 h at the calculated stress.
9.2 Design pressure strength (p )
D
The design pressure strength is derived from the long-term pressure strength, taking in account the
application classes and the overall design coefficients given in the relevant product standards (see Annex B).
4 © ISO 2008 – All rights reserved

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SIST EN ISO 21003-2:2009
ISO 21003-2:2008(E)
10 Thermal durability
10.1 Thermal durability of P-pipes
For P-pipes, the stress-designed layers shall be tested for thermal stability as described in the relevant
reference product standards.
The wall thickness of the test pieces shall be equal to the smallest wall thickness in the diameter range.
10.2 Thermal durability of M-pipes
10.2.1 Inner layer
For M-pipes, the material of the inner layer shall be tested for thermal stability as described in the relevant
reference product standard. The test pieces shall have a maximum wall thickness of 2 × the thinnest wall
thickness allowed for the inner layer. The stress applied in this test shall be 50 % of the stress for a 1 year test
duration, in accordance with the relevant reference product standard, without ductile failure occurring.
10.2.2 Outer layer
The thermal durability of the outer layer shall be determined either on the pipe with the thinnest outer layer for
each dimension group in accordance with Annex C or, provided the outer layer is a polyolefin, in accordance
with Annex C or Annex D irrespective of the thickness of the outer layer.
11 Strength of the weld line of M-pipes
The strength of the weld line is covered by the control points for the resistance to inner water pressure test in
accordance with ISO 17456.
12 Delamination
12.1 Multilayer P-pipes
Multilayer P-pipes shall comply with the requirements in Table 1.
Table 1 — Requirements for delamination
Requirement Test pieces Test method
a
No delamination EN 12293 EN 12293, visual
a
Using the test parameters of the relevant application class (see ISO 21003-5:2008, Table 5).
12.2 Multilayer M-pipes
Multilayer M-pipes shall comply with the requirements in Table 2.
Table 2 — Delamination resistance
Requirement Conditioning Test pieces Test method
F W 15 N/cm Before and after conditioning in ISO 17454 ISO 17454
pull
a
No delamination accordance with EN 12293
a
Using the test parameters of the relevant application class (see ISO 21003-5:2008, Table 5). To pre-stress branch A of the test
piece, the reference product standard and the dimensions of the inner layer shall be used.
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SIST EN ISO 21003-2:2009
ISO 21003-2:2008(E)
13 Oxygen permeability
In such instances where resistance to oxygen permeation is required, the pipes shall comply with the
requirements in Table 3.
Table 3 — Oxygen permeability
Application class Test temperature Requirement Test method
(see ISO 10508) °C F
ox,day
2
4 40 u 0,32 mg/m⋅day ISO 17455
2
5 80 u 3,6 mg/m⋅day ISO 17455
14 Physical and chemical characteristics
Wherever the manufacturer declares the reference product standard, the applicable physical characteristics
shall be checked in accordance with the corresponding clause of this reference product standard.
For the metal layer, the manufacturer shall specify the tensile strength, the elongation at break and the wall
thickness including tolerances.
15 Performance requirements
When multilayer pipes conforming to this part of ISO 21003 are jointed, the pipes and joints shall confor
...