ISO/TS 21003-7:2019

TECHNICAL ISO/TS
SPECIFICATION 21003-7
Second edition
2019-04
Multilayer piping systems for hot
and cold water installations inside
buildings —
Part 7:
Guidance for the assessment of
conformity
Systèmes de canalisations multicouches pour installations d'eau
chaude et froide à l'intérieur des bâtiments —
Partie 7: Guide pour l'évaluation de la conformité
Reference number
©
ISO 2019
© ISO 2019
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Published in Switzerland
ii © ISO 2019 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Abbreviated terms and symbols . 4
4.1 Abbreviated terms . 4
4.2 Symbols . 5
5 General . 5
6 Testing and inspection . 5
6.1 Grouping . 5
6.1.1 General. 5
6.1.2 Pressure groups . 5
6.1.3 Size groups . 6
6.1.4 Fitting groups . 6
6.2 Type testing . 6
6.3 Batch release test .15
6.4 Process verification tests (PVTs) .16
6.5 Audit tests (AT) .17
6.6 Indirect testing (IT).17
6.7 Test records.18
Annex A (informative) Interchangeability of different material grades — Testing of
alternative material grades for a layer in a multilayer M-pipe (second sourcing) .19
Bibliography .31
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 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 the following
URL: www .iso .org/iso/foreword .html.
This document was prepared by the European Committee for Standardization (CEN) Technical
Committee CEN/TC 155, Plastics piping systems and ducting systems, in collaboration with ISO Technical
Committee TC 138, Plastics pipes, fittings and valves for the transport of fluids, Subcommittee SC 2,
Plastics pipes and fittings for water supplies, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO/TS 21003-7:2008), which has been
technically revised. It also incorporates the Amendment ISO/TS 21003-7:2008/Amd1: 2010.
The major technical changes are:
— New definition of the terms “material”, “material grade” and “compound”;
— Revision of 6.2 “type testing”;
— Addition of Annex A "Interchangeability of different material grades — Testing of an alternative
material grades for a layer in a Multilayer M-Pipe (second sourcing)”.
A list of all parts in the ISO 21003 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.
iv © ISO 2019 – All rights reserved

Introduction
This document can be used to support elaboration of national third party certification procedures for
products conforming to the applicable part(s) of ISO 21003.
This document is a part of a System Standard for plastics piping systems of a particular material for a
specified application. There are a number of such System Standards.
At the date of publication of this document, System Standards for piping systems of other plastics
materials used for the same application are the following:
— ISO 15874, Plastics piping systems for hot and cold water installations — Polypropylene (PP)
— ISO 15875, Plastics piping systems for hot and cold water installations — Crosslinked polyethylene (PE-X)
— ISO 15876, Plastics piping systems for hot and cold water installations — Polybutene (PB)
— ISO 15877, Plastics piping systems for hot and cold water installations — Chlorinated poly (vinyl
chloride) (PVC-C)
— ISO 22391, Plastics piping systems for hot and cold water installations — Polyethylene of raised
temperature resistance (PE-RT)
They are supported by separate standards on test methods to which references are made throughout
the System Standard.
The System Standards are consistent with general standards on functional requirements and on
recommended practice for installation.
Figures 1 and 2 are intended to provide general information on the concept of testing and organisation
of those tests used for the purpose of the assessment of conformity. For each type of test, i.e. type testing
(TT), batch release test (BRT), process verification test (PVT), and audit test (AT), this document details
the applicable characteristics to be assessed as well as the frequency and sampling of testing.
A typical scheme for the assessment of conformity of materials, compounds, pipes, fittings, valves,
joints or assemblies by product manufacturers is given in Figure 1
Figure 1 — Typical scheme for the assessment of conformity by a product manufacturer
A typical scheme for the assessment of conformity of compounds, pipes, fittings, joints or assemblies by
manufacturers, including certification, is given in Figure 2.
Figure 2 — Typical scheme for the assessment of conformity by product a manufacturer,
including certification.
vi © ISO 2019 – All rights reserved

TECHNICAL SPECIFICATION ISO/TS 21003-7:2019(E)
Multilayer piping systems for hot and cold water
installations inside buildings —
Part 7:
Guidance for the assessment of conformity
1 Scope
This document gives requirements and guidance for the assessment of conformity of compounds,
products, and assemblies in accordance with the applicable part(s) of ISO 21003 intended to be included
in the manufacturer’s quality plan as part of the quality management system and for the establishment
of certification procedures.
In conjunction with the other parts of ISO 21003 (see Foreword), this document is applicable to
multilayer piping systems intended to be used for hot and cold water installations within buildings for
the conveyance of water, whether or not intended for human consumption (domestic systems) and for
heating systems, under design pressures and temperatures appropriate to the class of application (see
ISO 21003-1:2008, Table 1).
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 17456, Plastics piping systems — Multilayer pipes — Determination of long-term strength
ISO 21003-1, Multilayer piping systems for hot and cold water installations inside buildings — Part 1: General
ISO 21003-2, Multilayer piping systems for hot and cold water installations inside buildings — Part 2: Pipes
ISO 21003-3, Multilayer piping systems for hot and cold water installations inside buildings — Part 3:
Fittings
ISO 21003-5, Multilayer piping systems for hot and cold water installations inside buildings — Part 5:
Fitness for purpose of the system
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 21003-1, ISO 21003-3 and the
following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http: //www .electropedia .org/
— ISO Online browsing platform: available at http: //www .iso .org/obp
3.1
certification body
impartial body, governmental or non-governmental, possessing the necessary competence and
responsibility to carry out certification of conformity according to given rules of procedure and
management
Note 1 to entry: A certification body is preferably compliant with ISO/IEC 17065.
3.2
inspection body
body that performs inspection
Note 1 to entry: An inspection body can be an organization, or part of an organization.
[3]
Note 2 to entry: An inspection body is preferably compliant with ISO/IEC 17020 .
[3]
[SOURCE: ISO/IEC 17020:2012 , 3.5]
3.3
testing laboratory
laboratory which measures, tests, calibrates or otherwise determines the characteristics of the
performance of materials and products
Note 1 to entry: A testing laboratory is preferably compliant with ISO/IEC 17025.
3.4
quality management system
part of a management system with regard to quality
[1]
Note 1 to entry: Requirements for quality management systems are given in ISO 9001 .
[6]
[SOURCE: ISO 9000:2015 , 3.5.4, modified — Note 1 to entry has been added]
3.5
quality plan
document setting out the specific quality practices, resources and sequence of activities relevant to a
particular product or range of products
3.6
type testing
TT
testing performed to prove that the compound, component, product, joint or assembly is capable of
conforming to the requirements given in the relevant standard
Note 1 to entry: The type test results remain valid until there is a change in the compound or product or assembly
provided that the process verification tests are done regularly.
3.7
batch release test
BRT
test performed by or on behalf of the manufacturer on a batch of material compound, components or
products, which has to be satisfactorily completed before the batch can be released
3.8
process verification test
PVT
test performed by or on behalf of the product manufacturer on compounds, components, products or
joints at specific intervals to confirm that the process continues to be capable of producing components
and products which conform to the requirements given in the relevant standard
Note 1 to entry: Such tests are not required to release batches of materials, compound, components or products
and are carried out as a measure of process control
2 © ISO 2019 – All rights reserved

3.9
audit test
AT
test performed by a test laboratory on behalf of an inspection body or certification body to confirm
that the material, compound, components, product, joint or assembly continues to conform to the
requirements given in the relevant standard and to provide information to assess the effectiveness of
the quality management system
3.10
indirect test
IT
test performed by or on behalf of the manufacturer, different from that specified test for that particular
characteristic, having previously verified its correlation with the specified test
3.11
witness test
WT
test accepted by an inspection or a certification body for type testing and/or audit testing, which is
carried out by or on behalf of the manufacturer and supervised by a representative of the inspection or
certification body, qualified in testing
3.12
material
composition grouped by families, expressed by generic names used in material standards, e.g. PP-H, PB-
R, PE-RT Type II, PE-Xa, aluminium alloy type 8006
3.13
material grade
material with a defined specification from a material manufacturer
3.14
alternative material grade
material grade available for the production of a multilayer pipe, but different from the one used in the
type test (second sourcing)
Note 1 to entry: The pipe manufacturer might have alternative material grades for the inner layer, inner adhesive
layer, metal layer, outer adhesive layer and/or outer layer of the multilayer pipe.
3.15
compound
clearly defined homogenous mixture of base polymer with additives, i.e. antioxidants, pigments, stabilizers
and others, at a dosage level necessary for the processing and the intended use of the final product
3.16
batch of material grade
clearly identified quantity of a given homogeneous materials or compound manufactured under
uniform conditions and defined and identified by the materials or compound manufacturer
3.17
product
pipe, fitting, or valve of a clearly identified type intended to be a part of a piping system, which the
manufacturer puts on the market
3.18
product batch
clearly identified collection of units or products, manufactured consecutively or continuously under the
same conditions, using the same compounds conforming to the same specifications
Note 1 to entry: The production batch is defined and identified by the product manufacturer.
3.19
lot
clearly identifiable sub-division of a batch for inspection purposes
3.20
sample
one or more units or products drawn from the same production batch or lot, selected at random without
regard to their quality
Note 1 to entry: The number of products in the sample is the sample size.
3.21
group
collection of similar components from which samples are selected for testing purposes
3.22
component
product manufactured out of a specific material or compound, brought to the market as part of another
product or as a spare part
Note 1 to entry: For drinking water application, components may be considered as products and be individually
approved (e.g. o-ring, gasket) or they are tested as an integral part of a product (e.g. in a valve).
3.23
joint
connection between two or more products
3.24
assembly/assembled product
product consisting of two or more parts
3.25
sampling plan
specific plan, which defines the test and the number of units or products or assemblies to be inspected
3.26
product type
generic description of a product
EXAMPLE A pipe or fitting or valve or their main parts, of the same design, from a particular compound.
3.27
cavity
space within a mould to be filled to form the moulded product
EXAMPLE That part of an injection mould which gives the form to the injection-moulded product.
4 Abbreviated terms and symbols
4.1 Abbreviated terms
To avoid misunderstanding, the abbreviated terms in this clause are defined as being the same in each
language. For the same reason, the terms are given in the three languages, English, French and German.
EN FR DE
AT audit test essai d’audit Überwachungsprüfung
essai de libération de campagne de fab-
BRT batch release test Freigabeprüfung einer Charge
rication
IT indirect test essai indirect indirekte Prüfung
4 © ISO 2019 – All rights reserved

EN FR DE
essai de vérification du procédé de fab-
PVT process verification test Prozessüberprüfung
rication
TT type test essai de type Typprüfung
WT witness testing essai témoin Prüfung unter Aufsicht
4.2 Symbols
I Material grade used in the inner layer of the initial type-tested M-pipe
Ai Material grade used in the inner adhesive layer of the initial type-tested M-pipe
M Material grade used in the metal layer of the initial type-tested M-pipe
Ao Material grade used in the outer adhesive layer of the initial type-tested M-pipe
O Material grade used in the outer layer of the initial type-tested M-pipe
I Alternative material grade to be introduced in the inner layer
Ai Alternative material grade to be introduced in the inner adhesive layer
M Alternative material grade to be introduced in the metal layer
Ao Alternative material grade to be introduced in the outer adhesive layer
O Alternative material grade to be introduced in the outer layer
5 General
Compounds, products and assemblies shall conform to the requirements given of ISO 21003 (all parts).
Products and assemblies shall be produced by the manufacturer under a quality management system,
which includes a quality plan.
6 Testing and inspection
6.1 Grouping
6.1.1 General
For the purposes of this document, the groups specified in 6.1.2 to 6.1.4 apply.
6.1.2 Pressure groups
Two pressure groups are defined, as given in Table 1.
Table 1 — Pressure groups
Pressure group Operating pressure, p
op
bar
1 4; 6
2 8; 10
6.1.3 Size groups
Three size groups are defined for pipes and fittings, as given in Table 2.
Table 2 — Size groups
Size group Nominal diameter, d
n
mm
1 10 ≤ d ≤ 26
n
2 26 < d ≤ 63
n
3 d > 63
n
6.1.4 Fitting groups
Two groups of fittings having a similar design are defined, as given in Table 3.
Table 3 — Fitting groups
Fitting group Type of fitting
1 Elbows, tees, reducers, couplers, end caps
Unions, flange adaptors, transition fitting, adaptor pieces
and/or their plastics parts and others
6.2 Type testing
Relevant TTs shall be carried out on new systems and whenever there is a change in design, compound,
production site or production method, other than routine in-process adjustments, and/or whenever
there is an extension of the product range.
Type tests shall demonstrate that the products conform to all requirements for the characteristics
given in Table 6 to Table 10, as applicable.
Conditions considered as leading to a change of compound (M) of M-pipes and P-pipes are given in
Tables 4 and 5. Tables 4 and 5 offer a wide range of changes.
NOTE 1
— Example 1: A change of the inner layer material from PE-Xa to PERT Type II
— Example 2: A change of the metal layer material from an aluminium alloy type 8006 to a different aluminium
alloy type or even to a steel alloy.
— Example 3: A change of a material grade used for the inner layer to another material grade from another raw
material supplier.
The relevant characteristics to be tested in case of change of compound of M-pipes and P-pipes are
given in Tables 6, 7 and 10 in columns M1 –M5, as applicable.
However, combinations of such compound changes are not covered by Tables 6, 7 and 10. In case of a
combination of compound changes of a pipe, a full type testing is required, if Annex A (see below) is not
applicable.
A special case, similar to change of compound, but with a different intention is described in Annex A.
Annex A defines the testing of second sourcing material grades. It describes a qualified test scheme
to test the interchangeability of a currently used material grade for a layer of an initial type-tested
multilayer pipe by an alternative material grade intended to be used for this layer of this pipe. The
testing does not only ensure the interchangeability of a material grade for one layer, it covers also
all possible combinations, which can occur in the production later on, when for each layer the initial
material grade and a positive tested alternative material grade can be used.
6 © ISO 2019 – All rights reserved

The characteristics to be tested in case of change of compound (M) of plastic fittings are listed in Table 8
in columns M1 – M2 and in Table 10 in column MF, as applicable.
NOTE 2 The characteristics to be tested are applicable also for plastic fittings made of other polymer material
(e.g. PPSU, PSU, PVDF) than those materials specified in the relevant product standards.
The relevant characteristics to be tested in case of change of a metal fitting are given in Tables 9 and 10,
as applicable. A change of material of metal fittings without any change of design in those areas, which
are relevant to the joint performance, requires no testing as specified in ISO 21003-5.
Table 4 — Conditions considered to lead to a change of compound (M) for M-pipes
Type of change Conditions
Defined in Part 7 of the relevant reference product standard
where for M-pipes in this document only the specific “M1A”
change (change of polymer) is applicable.
a
Change of inner layer (M1)
All other “M” changes in the relevant reference product stand-
ards for the inner layer compound are assumed to be covered in
accordance with parts 7 of those relevant product standard (on
mono layer pipes).
Change of supplier
b
Change of inner adhesive layer (M2) Change of formulation
Change of chemical nature
Change of supplier
Change of metal (M3) Change of alloy/composition
Change of welding system
Change of supplier
c
Change of outer adhesive layer (M4) Change of formulation
Change of chemical nature
Change of supplier
d
Change of outer layer (M5) Change of formulation
Change of chemical nature
a
Inner layers are the layers in direct contact with the conveyed fluid and all other (stress designed) layers on the inner
side of the metal layer.
b
Inner adhesive layers are all layers applied as thin bonding layers on the inner side of the metal layer.
c
Outer adhesive layers are all layers applied as thin bonding layer on the outer side of the metal layer.
d
Outer layers are all layers applied on the outer side of the metal layer which could be non-stress designed layers. For
stress designed outer layers the M1 procedure applies.
Table 5 — Conditions considered to lead to a change of compound (M) for P-pipes
Type of change Conditions
Defined in Part 7 of the relevant reference product standard
where for M-Pipes in this document only the specific “M1A”
change (change of polymer) is applicable. (For PVC-C M1 ap-
a
Change of inner layer (M1)
plies.) All other “M” changes for the inner layer compound are
assumed to be covered in accordance with the parts 7 of the
relevant product standard (on mono layer pipes).
Change of supplier
b
Change of inner adhesive layer (M2) Change of formulation
Change of chemical nature
Change of supplier
Change of application (functional) layer (M3) Change of formulation
Change of chemical nature
Change of supplier
c
Change of outer adhesive layer (M4) Change of formulation
Change of chemical nature
Change of supplier
d
Change of (outer) plastics layer (M5) Change of formulation
Change of chemical nature
a
Inner layers are the layers in direct contact with the conveyed fluid and all other (stress designed) layers on the inner
side of the functional layer.
b
Inner adhesive layers are all layers applied as thin bonding layers on the inner side of the functional layer.
c
Outer adhesive layers are all layers applied as thin bonding layers on the outer side of the functional layer.
d
Outer layers are all layers applied on the outer side of the functional layer which could be non-stress designed layers.
For stress designed outer layers the M1 procedure applies.
For the purposes of defining a change in design, the following characteristics are relevant:
a) dimensions;
b) geometry of the product;
c) jointing system.
In the manufacturer’s quality plan, the geometry, the dimensions and the dimensional tolerances shall
be specified at least in accordance with and in addition to the requirements given in the relevant Part(s)
of ISO 21003. If one or more of these characteristics exceed the defined specifications, the relevant
characteristics given in Table 6 to Table 10, as applicable, shall be retested.
In case of extension of the product range (E), the relevant characteristics given in Table 6 to Table 10, as
applicable, shall be tested.
In case of a change of production site of a product (pipe / fitting) (P), the relevant characteristics given
in column P of Table 6 to Table 10, as applicable, shall be tested.
NOTE 1 As an exception, no testing is required in case of changes (M, E) for a product (pipes/fittings)
manufactured at an alternative production site provided that these changes (M, E) have been evaluated according
to this document for the same product (pipe/fitting) at an equivalent and evaluated production site and provided
that the production process of the product is equivalent.
NOTE 2 In case of a change of a production site of a material grade, the supplier has to ensure that the material
grade is identical. Additional testing of products (pipes/fitting) is not required.
8 © ISO 2019 – All rights reserved

Table 6 — M-pipes: Characteristics of M pipes that require type testing (TT)
a
Reference Conditions requiring test Sampling procedure
to part
Manufacturer Certification
and (sub)
b,c
body
Characteristic
clause of
N M1 M2 M3 M4 M5 P E
ISO 21003:
Influence on water
intended for human Part 1, 6.2 According to national regulations
consumption
1 test piece of 1 test piece of 1
each diameter and diameter/ size
Appearance Part 2, 6.1 + + + + + + + +
pressure group group and pres-
sure group
1 test piece with 1 test piece with
the smallest wall the smallest wall
d d d d d d d
Opacity Part 2, 6.2 + + + + + + + +
thickness pro- thickness pro-
duced duced
1 test piece of 1 test piece of 1
each diameter and diameter/ size
Dimensions Part 2, 8.2 + + + + + + + +
pressure group group and pres-
sure group
See Evaluation
ISO 17456:2006, checked by certifi-
6.2.3, 6.2.4 and cation body.
6.2.5 as applicable 3 test pieces
Long-term strength of 1 diameter/
e h e h h e
Part 2, 9.1 + + + + + + + +
of M-pipes size group and
pressure group,
according to
ISO 17456:2006,
6.2.5
Thermal durability 1 test piece per 1 test piece per
Part 2,
g
of M-pipes, inner + + − − − − − + compound compound
10.2.1
layer
Thermal durability 1 test piece per 1 test piece per
Part 2,
f
of M-pipes, outer + − − − − + − + compound compound
10.2.2
layer
1 test piece per 1 test piece per
Strength of weld Part 2,
+ − − + − − − − similar construc- similar construc-
line Clause 11
tion type tion type
1 test piece per 1 test piece per
Delamination of
Part 2, 12.2 + + + + − − + − similar construc- similar construc-
M-pipes
tion type tion type
1 test piece per 1 test piece per
Oxygen permea- Part 2,
+ − − + − − − − similar construc- similar construc-
bility Clause 13
tion type tion type
1 test piece per 1 test piece per
Physical and chemi- Part 2,
+ + − + − + − − similar construc- similar construc-
cal characteristics Clause 14
tion type tion type
1 sample of each 1 test piece of 1
Part 2, diameter diameter/ size
Marking + + − + − + + +
Clause 16 group and pres-
sure group
Table 6 (continued)
a
Reference Conditions requiring test Sampling procedure
to part
Manufacturer Certification
and (sub)
b,c
body
Characteristic
clause of
N M1 M2 M3 M4 M5 P E
ISO 21003:
a
N: new product, i.e. full type testing;
M1: change of the material grade of the inner layer;
M2: change of the material grade of the inner adhesive layer;
M3: change of the material grade of the metal layer;
M4: change of the material grade of the outer adhesive layer;
M5: change of the material grade of the outer layer;
P: change of production place
E: extension of product range;
+: test to be carried out.
b
Recommended sampling procedure for a testing laboratory working for a certification body.
c
Recommended sampling procedure for a testing laboratory working on behalf of a certification body.
Testing undertaken in manufacturer's laboratory shall be taken into account, by prior agreement with the
certification body.
d
Only if change of (coloured) compound has influence on the total pipe opacity.
e
In case of change to identical polymer material (e.g. PE-Xb to PE-Xb or PE-RT Type II to PE-RT Type II) or
metal materials with same specifications having similar physical properties, the confirmation testing in
accordance with ISO 17456:2006, 6.2.4., applies. If this confirmation testing leads to a lower pressure level
than the current lowest pressure lines in the same dimension group, the relevant dimensions shall be fully
tested in accordance with ISO 17456:2006, 6.2.3.
In case of change to a different polymer material (e.g. PE-Xa to PE-Xc or PP-R to PP-H) or changing from
aluminium alloy (e.g. type 8006 to type 8011) or even from an aluminium alloys to e.g. a steel alloy type the
complete testing in accordance with ISO 17456:2006, 6.2.3, applies.
f
To be performed in case the outer layer compound is only tested in accordance with ISO 21003-2:2008,
Annex C and the new dimension has a thinner outer layer wall thickness than the previous tested dimensions.
g
Only relevant if the extension contains M-pipes with a thinner inner layer compared to the original pipes.
h
Testing according to ISO 17456:2006, 6.2.5 “control point tests”.
Table 7 — P-pipes: Characteristics of P pipes that require type testing (TT)
a
Reference to Conditions requiring test Sampling procedure
part and
Characteristic b,c
Manufacturer Certification body
(sub) clause of
N M1 M2 M3 M4 M5 P E
ISO 21003:2008
Influence on water intend-
Part 1, 6.2 According to national regulations
ed for human consumption
1 test piece of 1 diam-
1 test piece per diame-
Appearance Part 2, 6.1 + + + + + + + + eter/ size group and
ter and pressure group
pressure group
1 test piece with the 1 test piece with the
d d d d d d d
Opacity Part 2, 6.2 + + + + + + + + smallest wall thickness smallest wall thickness
produced produced
1 test piece of 1 diam-
1 test piece per diame-
Dimensions Part 2, 8.2 + + + + + + + + eter/ size group and
ter and pressure group
pressure group
See ISO 17456:2006, Evaluation checked by
6.2.3, 6.2.4 and 6.2.5 as certification body.
Long-term strength of applicable 3 test pieces of 1 diame-
e g e g g e
Part 2, 9.1 + + + + + + + +
P-pipes ter/ size group and pres-
sure group, according to
ISO 17456:2006, 6.2.5
10 © ISO 2019 – All rights reserved

Table 7 (continued)
a
Reference to Conditions requiring test Sampling procedure
part and
Characteristic b,c
Manufacturer Certification body
(sub) clause of
N M1 M2 M3 M4 M5 P E
ISO 21003:2008
Thermal durability of 1 test piece per com- 1 test piece per com-
Part 2, 10.1 + + − − − − − −
P-pipes pound pound
1 test piece per com- 1 test piece per com-
f
Part 2, 10.2.2 + − − − − + − −
pound pound
1 test piece per similar 1 test piece per similar
Delamination of P-pipes Part 2, 12.1 + − + + + − + −
construction type construction type
Part 2, 1 test piece per similar 1 test piece per similar
Oxygen permeability + − − + − − − −
Clause 13 construction type construction type
Physical and chemical Part 2, 1 test piece per similar 1 test piece per similar
+ + − − − − − −
characteristics Clause 14 construction type construction type
1 test piece of 1 diam-
Part 2, 1 test piece per diame-
Marking + + − + − + + + eter/ size group and
Clause 16 ter and pressure group
pressure group
a
N: new product, i.e. full type testing
M1: change of the material grade of the inner layer;
M2: change of the material grade of the inner adhesive layer;
M3: change of the material grade of the metal layer;
M4: change of the material grade of the outer adhesive layer;
M5: change of the material grade of the outer layer;
P: change of production place;
E: extension of product range;
+: test to be carried out.
b
Recommended sampling procedure for a testing laboratory working for a certification body.
c
Recommended sampling procedure for a testing laboratory working on behalf of a certification body. Testing undertaken in manufacturer's
laboratory shall be taken into account, by prior agreement with the certification body.
d
Only if change of (colored) compound has influence on the total pipe opacity.
e
In case of change of layer thicknesses or change to identical polymer material (e.g. PE-Xb to PE-Xb or PE-RT Type II to PE-RT Type II) the con-
firmation testing in accordance with ISO 17456:2006, 6.2.4 applies. If this confirmation testing leads to a new lower pressure level then the
current pressure lines in the same dimension group, the relevant dimensions shall be fully tested in accordance with ISO 17456:2006, 6.2.3.
In case of change to a different polymer material (e.g. PE-Xa to PE-Xc or PP-R to PP-H) the complete testing in accordance with
ISO 17456:2006, 6.2.4, applies.
f
In case the outer layer compound is tested in accordance with ISO 21003-2:2008, 10.1 this aspect is expected to be covered by this test.
g
Testing according to ISO 17456:2006, 6.2.5 “control point tests”.
Table 8 — Plastic fittings: Characteristics of plastic fittings that require type testing (TT)
a
Reference Conditions requiring test Sampling procedure
to part and
Certification
clause or
b,c
body
Characteristic
subclause of
N D M1 M2 E P Manufacturer
ISO 21003:
Influence on
water intended
Part 1, 6.2 According to national regulations
for human
consumption
Hydrostatic Evaluation
Part 3, 5.1
e e e
stress proper- + − + + − − 1 evaluation per compound checked by certifi-
and 5.2
ties of material cation body
Thermal sta- Part 3, 5.1 Report checked by
+ − + + − − 1 test piece per compound
bility and 5.2 certification body
5 test pieces of 1 di-
f
Appearance Part 3, 6.1 + + + + + − 5 test pieces/ size group/fitting group ameter/ size group/
fitting group
Table 8 (continued)
a
Reference Conditions requiring test Sampling procedure
to part and
Certification
clause or
b,c
Characteristic body
subclause of
N D M1 M2 E P Manufacturer
ISO 21003:
1 test piece with
1 test piece with the smallest wall
d d d d
Opacity Part 3, 6.2 + + + + − − the smallest wall
thickness produced
thickness produced
5 test pieces of 1 di-
Part 3,
f
Dimensions + + + + + − 5 test pieces/ size group/fitting group ameter/ size group/
Clause 7
fitting group
3 test pieces of
1 diameter/ size
group/ fitting
Resistance 3 test pieces/ size group/ fitting
Part 3, group for the
to internal + + + + + + group for the relevant design pressure
Clause 8 relevant design
f
pressure and appropriate class of application
pressure and
appropriate class of
application
Physical and Evaluation
Part 3, 1 test piece per size group and fit-
chemical char- + + + + + + checked by certifi-
Clause 9 ting group
acteristics cation body
5 test piece of 1 di-
Part 3,
f
Marking + + + − + − 5 test piece/ size group/ fitting group ameter/ size group/
Clause 11
fitting group
a
Materials of the reference product standards are covered in Part 7 of those standards.
N: new product
D: change in design;
M1: change of polymer;
M2: change of additive package;
E: extension of product range;
P: change of production site of the pipes and fittings made of the same compounds to an existing product location, pro-
vided that the production process is equivalent;
+: test to be carried out.
b
Recommended sampling procedure for a testing laboratory working for a certification body.
c
Recommended sampling procedure for a testing laboratory working on behalf of a certification body. Testing undertaken
in manufacturer's laboratory shall be taken into account, by prior agreement with the certification body.
d
Only if change of (colored) compound has influence on the total fitting opacity.
e [5]
For 5.2 of Part 3: If the raw material supplier has evaluated the hydrostatic stress properties in accordance with ISO 9080 ,
or equivalent, the manufacturer of the fittings shall check conformity.
f
Shall contain fittings from each cavity. The minimum number of samples shall be at least one from each cavity.
12 © ISO 2019 – All rights reserved

Table 9 — Metal fittings: Characteristics of metal fittings that require type testing (TT)
a
Reference to Conditions requiring test Sampling procedure
part and clause
Certification
Characteristic
or subclause of
N D M1 P E Manufacturer b,c
body
ISO 21003:2008
Influence on water intend-
Part 1, 6.2 According to national regulations
ed for human consumption
Evaluation
1 evaluation
Material: Part 3, 5.3 + − + + − checked by cer-
per alloy
tification body
1 evaluation Evaluation
Sealing elements according acc. to EN 681- checked by cer-
Part 3, 9.3 + + + - +
to EN 681-1 1:2006-11, tification body
Table 3
5 test pieces/ 5 test pieces
size group/fit- of 1 diameter/
Appearance Part 3, 6.1 + + + + +
ting group size group/
fitting group
5 test pieces/ 5 test pieces
size group/fit- of 1 diameter/
Dimensions Part 3, 7.3 + + + + +
ting group size group/
fitting group
3 test pieces/ 3 test pieces
size group/ of 1 diameter/
fitting group size group/
for the relevant fitting group
Part 3, 7.3
Minimum wall thickness + + + - + design pressure for the relevant
EN 1254-3, 4.3.3
and appropri- design pressure
ate class of and appropri-
application ate class of
application
5 test piece/ 5 test piece of
size group/ 1 diameter/
Marking Part 3, Clause 11 + + + + +
fitting group size group/
fitting group
a
N: new product;
D: change in design;
M1: change of alloy;
P: change of production site (same product);
E: extension of product range;
+: test to be carried out.
b
Recommended sampling procedure for a testing laboratory working for a certification body.
c
Recommended sampling procedure for a testing laboratory working on behalf of a certification body.
Testing undertaken in manufacturer's laboratory shall be taken into account, by prior agreement with the
certification body.
Table 10 — Piping system, consisting of pipe (M-pipe, P-pipe) and fitting (plastic and/or metal):
Characteristics of fitness for purpose of the system that require type testing
a
[2] Reference [3] Conditions requiring test [4] Sampling procedure
[1] Charac- to part, clause
[6] Certifica-
teristic of ISO 21003: e
N D MF M1 M2 M3 M4 M5 E P [5] Manufacturer
b
tion body
d c,d c,d d
Resistance Part 5, 5.2 + + + + + - 3 test pieces per diame- 3 test pieces of
to internal ter and jointing system 1 diameter per
pressure for the relevant design size group and
pressure and appropri- jointing system
ate application class for the relevant
design pressure
and appropriate
application class
d c,d c,d d
Leaktightness Part 5, 5.3 + + + + + - 3 test pieces per diame- 3 test pieces of
under inter- ter and jointing system 1 diameter per
nal pressure for the relevant design size group and
and bending pressure and appropri- jointing system
ate application class for the relevant
design pressure
and appropriate
application class
d c,d c,d c,d c
...