ISO/TS 16486-7:2023
(Main)Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing — Part 7: Assessment of conformity
Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-U) piping systems with fusion jointing and mechanical jointing — Part 7: Assessment of conformity
This document gives guidance and requirements for the assessment of conformity of compounds, products, joints and assemblies in accordance with the applicable part(s) of the ISO 16486 series which are intended to be included in the manufacturer’s quality plan as part of the quality management system and for the establishment of certification procedures. NOTE 1 A basic test matrix in Annex B provides an overview of the testing scheme. It is recommended for the manufacturer to have a management system such as ISO 9001[4] or equivalent. NOTE 2 If certification is involved, certification bodies and inspection bodies operating according to ISO/IEC 17065 and ISO/IEC 17020 are considered to be competent. In conjunction with the other parts of the ISO 16486 series (see Clause 2), this document is applicable to unplasticized polyamide (PA-U) piping systems intended to be buried and used for the supply of gaseous fuels. It is applicable to PA-U pipes, fittings and valves, as well as to their joints and to joints with components of other materials intended to be used under the following conditions: a) a maximum operating pressure (MOP) up to and including 18 bar[1] (the MOP is limited to 16 bar for CEN member countries, where ISO 16486-6 is replaced by CEN/TS 12007-6[1]); b) an operating temperature of 20 °C as the reference temperature. NOTE 3 For operating temperatures different to 20 °C, derating coefficients can be used (see ISO 16486-6). CEN member countries use CEN/TS 12007-6[1] and ISO/TS 16486-7 (this document) as a basis, but they can also request additional requirements. For non-CEN member countries, information for dealing with special cases for PA-U can be found in ISO/TS 16486-7 (this document) and PPI TR-3.[7] For mechanical fittings conforming to ISO 17885, guidance for assessment of conformity is not given in this document. When requested, a quality plan based on the tests mentioned can be set up in agreement between user and manufacturer. The ISO 16486 series covers a range of maximum operating pressures and gives requirements concerning colours. NOTE 4 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. [1] 1 bar = 0,1 MPa = 105 Pa; 1 MPa = 1 N/mm2.
Systèmes de canalisations en matières plastiques pour la distribution de combustibles gazeux — Systèmes de canalisations en polyamide non plastifié (PA-U) avec assemblages par soudage et assemblages mécaniques — Partie 7: Evaluation de la conformité
General Information
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Standards Content (Sample)
TECHNICAL ISO/TS
SPECIFICATION 16486-7
First edition
2023-07
Plastics piping systems for the supply
of gaseous fuels — Unplasticized
polyamide (PA-U) piping systems
with fusion jointing and mechanical
jointing —
Part 7:
Assessment of conformity
Systèmes de canalisations en matières plastiques pour la distribution
de combustibles gazeux — Systèmes de canalisations en polyamide
non plastifié (PA-U) avec assemblages par soudage et assemblages
mécaniques —
Partie 7: Evaluation de la conformité
Reference number
© ISO 2023
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Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Abbreviated terms . 5
5 General . 5
6 Testing and inspection .5
6.1 Grouping . 5
6.1.1 General . 5
6.1.2 Size groups . 5
6.1.3 Fitting groups . 6
6.1.4 Fitting types . 6
6.2 Type testing . 6
6.3 Batch release testing . 13
6.4 Process verification tests . 17
6.5 Audit tests . 21
6.6 One-off products and products produced in very low quantity .23
6.6.1 Type test results . 23
6.6.2 Test records . 24
6.6.3 Technical file for certification purposes . 24
Annex A (normative) Change of compound .25
Annex B (informative) Basic test matrix for PA-U compounds and piping products .27
Bibliography .33
iii
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves
for the transport of fluids, Subcommittee SC 4, Plastics pipes and fittings for the supply of gaseous fuels,
in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/
TC 155, Plastics piping systems and ducting systems, in accordance with the Agreement on technical
cooperation between ISO and CEN (Vienna Agreement).
A list of all parts in the ISO 16486 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
Introduction
This document specifies requirements and guidance for the assessment of conformity (AoC) for a piping
system and its components made from unplasticized polyamide (PA-U), and which is intended to be
used for the supply of gaseous fuels.
Requirements and test methods for material and components of the piping system are specified in
ISO 16486-1, ISO 16486-2, ISO 16486-3 and ISO 16486-4.
Characteristics for fitness for purpose of the system and generic fusion parameters are covered in
ISO 16486-5.
Recommended practice for installation is provided in ISO 16486-6, which will not be implemented as
European Standard under the Vienna Agreement.
[1]
Recommended practice for installation is also provided in CEN/TS 12007-6, prepared by Technical
Committee CEN/TC 234, Gas infrastructure.
Training and assessment of fusion operators is given in ISO/TS 16486-8.
NOTE While ISO 16486-1, ISO 16486-2, ISO 16486-3, ISO 16486-5, ISO 16486-6 and ISO/TS 16486-7 (this
document) and ISO/TS 16486-8 have been prepared by ISO/TC 138, SC 4, ISO 16486-4 has been prepared by
ISO/TC 138, SC 7.
This document details the applicable characteristics to be assessed for type testing (TT), batch release
testing (BRT), process verification testing (PVT) and audit testing (AT), as well as the frequency and
sampling for testing.
The concept of testing and organization of those tests used for the AoC is shown, without or with
certification, in Figures 1 and 2.
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.
SOURCE ISO/TS 15874-7:2018.
Figure 1 — Typical scheme for the AoC by a manufacturer, without certification
A typical scheme for the assessment of conformity of compounds, pipes, fittings, valves, joints or
assemblies by manufacturers, including certification, is given in Figure 2.
v
SOURCE ISO/TS 15874-7:2018.
Figure 2 — Typical scheme for the AoC by a manufacturer, including certification
vi
TECHNICAL SPECIFICATION ISO/TS 16486-7:2023(E)
Plastics piping systems for the supply of gaseous fuels —
Unplasticized polyamide (PA-U) piping systems with fusion
jointing and mechanical jointing —
Part 7:
Assessment of conformity
1 Scope
This document gives guidance and requirements for the assessment of conformity of compounds,
products, joints and assemblies in accordance with the applicable part(s) of the ISO 16486 series which
are intended to be included in the manufacturer’s quality plan as part of the quality management
system and for the establishment of certification procedures.
NOTE 1 A basic test matrix in Annex B provides an overview of the testing scheme.
[4]
It is recommended for the manufacturer to have a management system such as ISO 9001 or equivalent.
NOTE 2 If certification is involved, certification bodies and inspection bodies operating according to
ISO/IEC 17065 and ISO/IEC 17020 are considered to be competent.
In conjunction with the other parts of the ISO 16486 series (see Clause 2), this document is applicable
to unplasticized polyamide (PA-U) piping systems intended to be buried and used for the supply of
gaseous fuels. It is applicable to PA-U pipes, fittings and valves, as well as to their joints and to joints
with components of other materials intended to be used under the following conditions:
1)
a) a maximum operating pressure (MOP) up to and including 18 bar (the MOP is limited to 16 bar for
[1]
CEN member countries, where ISO 16486-6 is replaced by CEN/TS 12007-6 );
b) an operating temperature of 20 °C as the reference temperature.
NOTE 3 For operating temperatures different to 20 °C, derating coefficients can be used (see ISO 16486-6).
[1]
CEN member countries use CEN/TS 12007-6 and ISO/TS 16486-7 (this document) as a basis, but they can also
request additional requirements. For non-CEN member countries, information for dealing with special cases for
[7]
PA-U can be found in ISO/TS 16486-7 (this document) and PPI TR-3.
For mechanical fittings conforming to ISO 17885, guidance for assessment of conformity is not given in
this document. When requested, a quality plan based on the tests mentioned can be set up in agreement
between user and manufacturer.
The ISO 16486 series covers a range of maximum operating pressures and gives requirements
concerning colours.
NOTE 4 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.
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.
5 2
1) 1 bar = 0,1 MPa = 10 Pa; 1 MPa = 1 N/mm .
ISO 12162, Thermoplastics materials for pipes and fittings for pressure applications — Classification,
designation and design coefficient
ISO 13477, Thermoplastics pipes for the conveyance of fluids — Determination of resistance to rapid crack
propagation (RCP) — Small-scale steady-state test (S4 test)
ISO 16486-1:2020, Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-
U) piping systems with fusion jointing and mechanical jointing — Part 1: General
ISO 16486-2:2020, Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-
U) piping systems with fusion jointing and mechanical jointing — Part 2: Pipes
ISO 16486-3:2020, Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-
U) piping systems with fusion jointing and mechanical jointing — Part 3: Fittings
ISO 16486-4:2022, Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-
U) piping systems with fusion jointing and mechanical jointing — Part 4: Valves
ISO 16486-5:2021, Plastics piping systems for the supply of gaseous fuels — Unplasticized polyamide (PA-
U) piping systems with fusion jointing and mechanical jointing — 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 16486-1, ISO 16486-2,
ISO 16486-3, ISO 16486-4 and ISO 16486-5 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
certification body
third-party conformity assessment body operating certification schemes
Note 1 to entry: A certification body can be non-governmental or governmental (with or without regulatory
authority).
3.2
laboratory
body that performs one or more of the following activities:
— testing;
— calibration;
— sampling, associated with subsequent testing or calibration
Note 1 to entry: Within the context of this document, the materials and products can be subjected to type testing,
batch release testing, process verification testing and audit testing, as applicable.
3.3
quality management system
part of a management system with regard to quality
Note 1 to entry: Requirements for quality management systems are given in ISO 9001.
[SOURCE: ISO 9000:2015, 3.5.4, modified — Note 1 to entry added.]
3.4
quality plan
document setting out the specific quality practices, responsibilities, resources and sequence of activities
relevant to a particular product or range of products
3.5
type testing
TT
test performed to prove that the material, component, product, joint or assembly is capable of
conforming to the requirement(s) given in the relevant standard
3.6
batch release test
BRT
test performed on a batch of material, components, products, joints or assemblies which has to be
satisfactorily completed before the batch can be released
Note 1 to entry: A batch release test can be performed by the manufacturer or outsourced on behalf of the
manufacturer.
3.7
process verification test
PVT
test performed on material, component, product, joint or assembly at specific intervals to confirm
that the process continues to be capable of producing components, products which conform to the
requirements given in the relevant standard
Note 1 to entry: Process verification tests can be performed by the manufacturer or outsourced on behalf of the
manufacturer.
Note 2 to entry: Process verification tests are regularly performed to demonstrate that the product remains
compliant with the type test results.
2) [9]
Note 3 to entry: ISO/AWI 8149:— presents the stress rupture curves for PA-U and PPI TR-4 lists the long-
term hydrostatic strength at different temperatures for a number of different PA-U piping materials.
3.8
audit test
AT
test performed on behalf of a certification body
Note 1 to entry: Audit tests are generally required to confirm that the 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.
3.9
indirect test
IT
batch release test performed which differs from that specified test for that particular characteristic,
having previously verified its correlation with the specified test
Note 1 to entry: Indirect tests can be performed by the manufacturer or outsourced on behalf of the manufacturer.
3.10
witness test
WT
type test or audit test which is performed in the presence of a representative of the certification body
2) Under preparation. Stage and the time of publication: ISO/AWI 8149:2023.
3.11
material
generic term for compounds grouped by families, expressed by generic names
Note 1 to entry: Examples of generic names are PA-U 11, PA-U 12.
3.12
compound
homogenous mixture of substances used for the manufacture of the product as defined in the referring
product standard
Note 1 to entry: Annex A gives testing requirements for changes made to the compound.
3.13
material batch
batch of material
quantity of a given homogeneous compound manufactured under uniform conditions defined and
identified by the compound manufacturer
3.14
product
item as defined in the scope of this document, e.g. pipe, fitting, valve
3.15
product batch
batch of products
clearly identified collection of products, manufactured consecutively or continuously under the same
conditions, using the same compound conforming to the same specification
Note 1 to entry: The production batch is defined and identified by the product manufacturer.
3.16
lot
clearly identifiable sub-division of a batch for inspection purposes
3.17
sample
one or more units or products drawn from the same production batch or a lot, selected at random
without regard to their quality
3.18
group
collection of similar components or products from which samples are selected for testing purposes
3.19
component
item manufactured out of a specific compound, supplied as part of a product or as a spare part for that
product
Note 1 to entry: Depending on the context, components can potentially be considered as products and be
individually approved (e.g. o-ring, gasket) or they are tested as an integral part of a finished product (e.g. in a
valve).
3.20
joint
connection between two or more products
3.21
assembly
set of components that forms a product or a test piece
3.22
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.
3.23
body type
generic description of a valve body
Note 1 to entry: A valve body is of a particular design which can have different end connections.
3.24
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
To avoid misunderstanding, the abbreviated terms listed in this Clause are defined as being equivalent
in each language. For the same reason, the terms are given in the languages, English, French, Russian
and German; see Table 1.
Table 1 — Abbreviated terms in English, French, Russian and German
Term EN FR RU DE
AT audit test essai d’audit Инспекционные Überwachungsprüfung
испытания
BRT batch release test essai de libération de Приемо-сдаточные Freigabeprüfung einer
campagne de fabrication испытания Charge
PVT process verification test essai de vérification du Периодические Prozessüberprüfung
procédé de fabrication испытания
TT type test essai de type Типовые испытания Typprüfung
5 General
Materials, products and fitness for purpose shall conform to the requirements given in ISO 16486-1,
ISO 16486-2, ISO 16486-3, ISO 16486-4 and ISO 16486-5.
Materials and products 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 purpose of this document, the groups specified in 6.1.2 to 6.1.4 apply.
6.1.2 Size groups
Three size groups are defined for pipes and fittings, as given in Table 2.
For testing purposes, one individual nominal diameter, d , shall be selected from each group.
n
Table 2 — Size groups
Size group Nominal diameter
d
n
mm
1 16 ≤ d ≤ 63
n
2 63 < d ≤ 225
n
3 225 < d ≤ 630
n
6.1.3 Fitting groups
Three groups of fittings each having a similar design are defined, as given in Table 3.
For testing purposes, one individual fitting shall be selected from each group.
Table 3 — Fitting groups
Fitting groups
(A) Electrofusion socket fitting
(B) Electrofusion saddle fitting
(C) Spigot end fitting
6.1.4 Fitting types
Fitting groups are divided into fitting types.
Fitting group (A) includes the following fitting types: electrofusion couplers, electrofusion 45° elbows,
electrofusion 90° elbows, electrofusion tees, electrofusion reducers, electrofusion end caps, etc.
Fitting group (B) includes the following fitting types: electrofusion tapping saddles, electrofusion
branch saddles, etc.
Fitting group (C) includes the following fitting types: 45° elbows, 90° elbows, tees, reducers, end caps,
etc.
6.2 Type testing
Type testing is intended to demonstrate the ability of the product to fulfil the intended use and
characteristics detailed in the referring product standard.
Type testing shall be performed as described in Tables 4, 5, 6 and 7 whenever there is:
a) a new system (N);
b) a change in design (D);
c) a change in material (M);
d) an extension of the product range (E).
It can be necessary to revalidate type testing in the case of process verification test deviation (see 6.4).
When a change of production site occurs, the manufacturer shall determine which type tests need to be
revalidated.
Unless any of the conditions described in points a) to d) occurs, the type test results remain valid.
A type test may be performed by the manufacturer or outsourced on behalf of the manufacturer.
NOTE It is recommended that the location of the test be made available if certification is involved.
Type tests shall demonstrate that the products conform to all requirements for the characteristics
given in Tables 4 to 7, as applicable.
In case of a change in compound as defined in Clause A.2, relevant type testing requirements as defined
in Clause A.3, and in Tables 4 to 7 as applicable, shall apply.
For the purposes of a change:
a) dimensions and geometry (see column D1 of Tables 6 and 7), are defined as: change of visual and
functional optimizations, change of overall dimensions, change of a non-PA part;
b) jointing system joint affected part (see column D2 of Tables 6 and 7), is defined as: change of the
dimensions of the fusion zone (e.g. wire pitch, wire depth), the electrical characteristics (e.g. wire,
resistance), the fusion parameters (e.g. time, voltage).
For the extension of the production range, the relevant characteristics given in Table 6 and Table 7,
column E, as applicable, shall be retested. If certification is involved, retesting shall be agreed between
the certification body and the manufacturer.
Table 4 — Characteristics of compounds that require type testing (TT) by the compound
manufacturer
Characteristic Reference Sampling procedure
Compound density ISO 16486-1:2020, Once/compound
5.2.5
Viscosity number ISO 16486-1:2020, Once/compound
5.2.5
Water content ISO 16486-1:2020, Once/compound
5.2.5
a
Carbon black content ISO 16486-1:2020, Once/compound
5.2.5
a
Carbon black dispersion ISO 16486-1:2020, Once/compound
5.2.5
b
Pigment dispersion ISO 16486-1:2020, Once/compound
5.2.5
Chemical resistance (or re- ISO 16486-1:2020, Once/compound
sistance to gas condensate) 5.2.5
c
Resistance to weathering ISO 16486-1:2020, Once/compound
5.2.5
d
Resistance to rapid crack ISO 16486-1:2020, Once/compound
propagation (Critical pres- 5.2.5
e
according to ISO 13478 (withdrawn)
sure, p )
c
(e ≥ 5 mm)
(Full-scale test)
f,g
Resistance to rapid crack ISO 16486-1:2020, Once/compound
propagation (critical pres- 5.2.5
according to ISO 13477
sure, p )
c,S4
(S4 test)
Resistance to slow crack ISO 16486-1:2020, Once/compound
growth (d : 110 mm SDR 11) 5.2.5
n
TTabablele 4 4 ((ccoonnttiinnueuedd))
Characteristic Reference Sampling procedure
Determination of the ISO 16486-1:2020, Once/compound
failure mode in a tensile 5.3,
test on a butt fusion weld
ISO 16486-5:2021,
(d : 110 mm SDR 11)
n
5.2.1.1 and Table 5
ISO 16486-1:2020, Once/compound
5.3,
ISO 16486-5:2020,
5.2.1.2 and Table 5
Classification ISO 16486-1:2020, Shall conform to ISO 12162, Once/com-
5.4 pound
a
Only applicable for black compound.
b
Only applicable for non-black compound.
c
Three pieces for elongation at break/Three pieces for hydrostatic strength/One sam-
ple for decohesion of an electrofusion joint.
d
And for every pipe dimension with d > 90 mm.
n
e
Cooling for crack initiation according to ISO 16486-1:2020, 5.2.5.
f
Relation between pipe sample for FS- and S4-test according to ISO 16486-1:2020, 5.2.5
g
Reference value definition according to ISO 16486-1:2020, 5.2.5 with link for use as
defined in ISO 16486-2.
Table 5 — Characteristics of pipes that require type testing (TT)
Conditions
requiring Sampling procedure
Characteristic Reference a
test
b c c,d
N M E Manufacturer Certification body
ISO 16486-
Appearance + + + Each diameter One diameter/size group
2:2020, 5.1
ISO 16486-
Colour + + + Each diameter One diameter/size group
2:2020, 5.2
ISO 16486-
Geometrical characteris-
2:2020, + + + Each diameter One diameter/size group
tics
Clause 6
Hydrostatic strength ISO 16486-
e
+ + + One diameter/size group One diameter/size group
(20 °C, 1 000 h) 2:2020, 7.2
Hydrostatic strength ISO 16486-
e
+ + + One diameter/size group One diameter/size group
(80 °C, 165 h) 2:2020, 7.2
ISO 16486-
e
Elongation at break + + + One diameter/size group One diameter/size group
2:2020, 7.2
Resistance to slow crack ISO 16486-
e
growth e > 5 mm (notch 2:2020, 7.2 + + + One diameter/size group One diameter/size group
test)
Resistance to rapid crack ISO 16486- Number of samples shall Number of samples shall
propagation (critical pres- 2:2020, 7.2 + + + conform to ISO 13477 of conform to ISO 13477 of
sure, p ) one diameter one diameter
c
Melt volume flow rate ISO 16486-
f
+ - - One diameter/size group Not applicable
(MVR) 2:2020, 8.2
ISO 16486-
Viscosity number + + - One diameter/size group One diameter/size group
2:2020, 8.2
ISO 16486-
g
Longitudinal reversion + + + One diameter/size group One diameter/size group
2:2020, 8.2
TTabablele 5 5 ((ccoonnttiinnueuedd))
Conditions
requiring Sampling procedure
Characteristic Reference a
test
b c c,d
N M E Manufacturer Certification body
ISO 16486-
By checking the test re-
Marking 2:2020, + + - Each diameter
sult of the manufacturer
Clause 9
ISO 16486- Tested on the compound in the form of pipe by the compound suppli-
Resistance to weathering
1:2020, 5.2.5 er
ISO 16486-
Tensile strength for butt One diameter/size group By checking the test re-
5:2020, + + -
fusion 2 sults of the manufacturer
5.2.1.1
ISO 16486-
Tensile strength for butt One diameter/size group By checking the test re-
5:2020, + + -
fusion 2 sults of the manufacturer
5.2.1.1
ISO 16486-
By checking the test re-
e,h
Squeeze off 2:2020, + + - One diameter
sults of the manufacturer
Annex A
a
N : new system;
M : change of compound;
E : extension of the product range (except the products already covered by the scheme of sampling
procedure);
+ : test to be carried out;
- : test not to be carried out.
b
Annex A gives testing requirements for changes made to the compound.
c
Successful testing will validate pipe with the same d and a higher SDR, i.e. thinner wall thickness. Where
n
a manufacturer extends their production beyond their approval, additional relevant type testing shall be
carried out.
d
Recommended sampling procedure for a testing laboratory working on behalf of a certification body.
Testing undertaken in manufacturer's laboratory can be taken into account, by prior agreement with the
certification body.
e
Sampling procedure of only one diameter per size group.
f
Reference for BRT and PVT at the manufacturer.
g
Longitudinal reversion is applicable to wall thickness < 16 mm.
h
To be performed preferably on d 63 SDR 11.
n
Table 6 — Characteristics of fittings that require type testing (TT)
Conditions requiring
Sampling procedure
a
c test
Characteristic Reference
b
N D1 D2 M E Manufacturer Certification body
ISO 16486- 5 fittings/size/ 5 fitting of one diameter/size
Appearance + − − + +
f
3:2020, 5.1 fitting type group/fitting type
ISO 16486- 5 fittings/size/ 5 fitting of one diameter/size
Colour + − − + +
f
3:2020, 5.3 fitting type group/fitting type
Electrical character- ISO 16486- 5 fittings/size/ 5 fitting of one diameter/size
+ − + - +
f
istics (A) (B) 3:2020, 5.4 fitting type group/fitting type
ISO 16486-
Geometrical charac- 5 fittings/size/ 5 fitting of one diameter/size
3:2020, + + + + +
f
teristics fitting type group/fitting type
Clause 6
Hydrostatic strength ISO 16486- 3 fittings/size/ 3 fitting of one diameter/size
e
+ − − + +
f,h,i,j i,j,k
(20 °C, 1 000 h) 3:2020, 7.3 fitting type group/fitting type
ISO 16486- 3 fittings/size/ 3 fittings of one diameter/size
Hydrostatic strength
+ − + + −
f,h,i,j i,j,k
3:2020, 7.3 fitting type group/fitting type
(80 °C, 165 h)
ISO 16486- 1 fitting/size group/ By checking the test results of
g
+ − + + +
(A,B,C )
i,j
5:2021, 5.2 fitting type the manufacturer
ISO 16486-
3:2020, 7.3
Cohesive resistance 1 fitting/size/fitting 1 fitting of one diameter/size
e
+ − + + +
ISO 16486- f
for electrofusion
type/condition group/fitting type/condition
5:2021,
socket fittings
5.2.2.1
(A)
ISO 16486- 1 fitting/size/fitting 1 fitting of one diameter/size
e
+ − + + +
f
5:2021,5.2.2.2 type/condition group/fitting type/condition
ISO 16486-
3:2020, 7.3
Evaluation of duc- 1 fitting/size/fitting 1 fitting of one diameter/size
e
+ − + + +
ISO 16486- f,k k
tility of fusion joint type/condition group/fitting type/condition
5:2021,
interface for electro-
5.2.2.1
fusion saddle fittings
ISO 16486-
(B)
1 fitting/size/fitting 1 fitting of one diameter/size
e
5:2021, + − + + +
f,k k
type/condition group/fitting type/condition
5.2.2.2
ISO 16486-
3:2020, 7.3
1 fitting/size group/
By checking the test results of
+ − − + + fitting group/con-
ISO 16486-
Tensile strength for
the manufacturer
dition
g
5:2021,
butt fusion joints
4.2.1.1
(C)
ISO 16486- 1 fitting/size group/
By checking the test results of
5:2021, + − − − − fitting group/con-
the manufacturer
5.2.1.2 dition
Impact resistance
ISO 16486- 1 fitting/size/fitting
e
+ − + + + 1 fitting/size group/fitting type
3:2020, 7.3 type
(B)
Pressure drop
ISO 16486- 1 fitting/size/fitting By checking the test results of
+ + − − +
3:2020, 7.3 type the manufacturer
(B)
Short-term internal
ISO 16486- 3 fittings/size/ 3 fittings of one diameter/size
pressure resistance e
+ − + + +
f,k k
3:2020, 7.3 fitting type group/fitting type
d
(A)
Resistance to tensile ISO 16486- 3 fittings/size/ 3 fittings of one diameter/size
e
+ − + + +
d f,k k
load (A) 3:2020, 7.3 fitting type group/fitting type
Melt volume flow ISO 16486- 1 fitting of one dia-
l
+ - - + - Not applicable
rate (MVR) 3:2020, 8.2 meter/size group
ISO 16486- 1 fitting of one dia- 1 fitting of one diameter/size
Viscosity number + - - + -
3:2020, 8.2 meter/size group group
TTabablele 6 6 ((ccoonnttiinnueuedd))
Conditions requiring
Sampling procedure
a
c test
Characteristic Reference
b
N D1 D2 M E Manufacturer Certification body
ISO 16486-
5 fittings/size/ 5 fittings of one diameter/size
Marking 3:2020, 11.1 + − − + +
f
fitting type group/fitting type
to 11.3
Fusion system rec-
ISO 16486- 5 fittings/size/
ognition
+ − + - + −
3:2020, 11.4 fitting type
(A) (B)
a
N : new system;
D1 : change of dimensions and geometry as: change of visual and functional optimisation, change of overall
dimensions, change of a non-PA-U part;
D2 : change of joint affected part as: change of the dimension of the fusion zone (e.g. wire pitch, wire depth),
the electrical characteristics (e.g. wire, resistance), the fusion parameters (e.g. time, voltage);
M : change of compound of the same MRS. In case of change of the MRS, type tests according column (N) shall
apply;
E : extension of the fitting range;
+ : test to be carried out;
- : test not to be carried out.
b
Recommended sampling procedure for a testing laboratory working on behalf of a certification body. Testing
undertaken in manufacturer's laboratory can be taken into account, by prior agreement with the certification
body.
c
The characteristic is relevant for (A), (B) and (C), if (A), (B) and/or (C) are not mentioned:
(A): Electrofusion socket fitting;
(B): Electrofusion saddle fitting;
(C): Spigot end fitting.
d
Only applicable if ISO 16486-3:2020, 6.2.2 c) applies.
e
Manufacturer sampling procedure changed from "size/fitting type" to "2 dimensions/size group/fitting type".
f
Shall contain fittings from each cavity. The minimum number of samples shall be at least one from each cavity.
g
Only applicable to size group 2 and 3.
h
One test piece for size group 3.
i
Alternatively for d > 450 mm, the test can be performed water-in-air. In case of dispute, water-in-water shall
n
be used.
j
For fitting type (B), d > 450 mm alternative testing (e.g. pressurization through saddle outlet) allowed.
n
k
Alternatively for fitting type (B) d > 450 mm may be checked by the strip bend test according to ISO 21751.
n
l
Reference for BRT and PVT at the manufacturer.
Table 7 — Characteristics of valves that require type testing (TT)
a
Conditions requiring test Sampling procedure
Characteristic Reference
b
N D1 D2 M E Manufacturer Certification body
ISO 16486- + + 5 valves/size/pro- 5 valves of one diameter/
Appearance + − +
c
4:2022, 6.1 ½/6 ½/6 duct type size group/product type
ISO 16486- + + 5 valves/size/pro- 5 valves of one diameter/
Colour + − +
c
4:2022, 6.2 ½ ½ duct type size group/product type
ISO 16486-
Geometrical character- + + + 5 valves/size/pro- 5 valves of one diameter/
4:2022, + +
c
istics 2/6 2/6 2/6 duct type size group/product type
Clause 7
Hydrostatic strength ISO 16486- + + 3 valves/size/pro 3 valves of one diameter/
+ − +
c
(20 °C, 1 000 h) 4:2022, 8.3 ½ ½ duct type size group/product type
Hydrostatic strength
ISO 16486- + + 3 valves/size/pro- 3 valves of one diameter/
+ − +
c
4:2022, 8.3 ½/4 ½/4 duct type size group/product type
(80 °C, 165 h)
Leaktightness of seat
ISO 16486-
and packing
+ − + + + 1 valve/body type 1 valve/body type
4:2022, 8.3
(25 mbar, 1 h)
Leaktightness of seat
ISO 16486-
and packing
+ - + + + 1 valve/body type 1 valve/body type
4:2022, 8.3
(1,5 MOP, 30 s)
ISO 16486- + 1 valve/size/pro-
Pressure drop + − − + 1 valve/size/product type
4:2022, 8.3 ½/3/4 duct type
ISO 16486-
Operating torque + − + + + 1 valve/body type 1 valve/ body type
4:2022, 8.3
ISO 16486- + +
Stop resistance + − + 1 valve/body type 1 valve/body type
4:2022, 8.3 1/3/5/6 1/3/5/6
Actuation mechanism ISO 16486- + +
+ − − 1 valve/body type 1 valve/body type
resistance 4:2022, 8.3 3/5/6 3/5/6
Resistance to bending ISO 16486- + + 1 valve/size/pro-
+ − + 1 valve/size/product type
c
between supports 4:2022, 8.3 ½/3/4 ½/3/4 duct type
Thermal cycling resis- ISO 16486-
+ − + + + 1 valve/body type 1 valve/body type
tance d > 63 mm 4:2022, 8.3
n
Leaktightness under
ISO 16486-
bending with thermal + − + + + 1 valve/body type 1 valve/body type
4:2022, 8.3
cycling, d ≤ 63 mm
n
Leaktightness after ten- ISO 16486- + +
+ − + 1 valve/body type 1 valve/body type
h
sile loading 4:2022, 8.3 ½/3/4 ½/3/4
Leaktightness under
and after bending ISO 16486-
+ − + + + 1 valve/body type 1 valve/body type
applied to the operating 4:2022, 8.3
mechanism
Impact loading resis- ISO 16486- + +
+ − − 1 valve/body type 1 valve/body type
tance 4:2022, 8.3 1/3/5/6 1/3/5/6
Multiple test after the
e,f
internal pressure test
1) Long term resist-
ance
2) Leaktightness
of seat and packing
ISO 16486- 1 valve/body type/ 1 valve/body type/size
25 mbar
+ − + + +
4:2022, 8.3 size group group
3) Leaktightness
of seat and packing
1,5 MOP
4) Operating torque
5) Impact loading
resistance
Melt volume flow rate ISO 16486- 1 valve of one dia-
g
+ - - + + Not applicable
(MVR) 4:2022, 9.2 meter/size group
TTabablele 7 7 ((ccoonnttiinnueuedd))
a
Conditions requiring test Sampling procedure
Characteristic Reference
b
N D1 D2 M E Manufacturer Certification body
ISO 16486- 1 valve of one dia- 1 valve of one diameter/size
Viscosity number + - - + +
4:2022, 9.2 meter/size group group
ISO 16486- + + 1 valve/size/pro-
Marking + − + 1 valve/size/product type
4:2022,12 ½ ½ duct type
Tensile strength for ISO 16486- + + 1 valve/size group/ By checking the test results
+ − +
d
butt fusion 5:2021, 5.2.1.1 2 2 product type of the manufacturer
Tensile strength for ISO 16486- + + 1 valve/size group/ By checking the test results
+ − +
d
butt fusion 5:2021-5.2.1.2 2 2 product type of the manufacturer
Hydrostatic strength
ISO 16486- + + 1 valve/size group/ By checking the test results
+ − −
c
d 5:2021-5.2.1.2 2 2 product type of the manufacturer
(80 °C, 165 h)
a
N : new system;
D1 : change in design with no effect on valve performance;
D2 : change in design with effect on valve performance;
M : change of compound of the same MRS. In case of change of the MRS, type tests according column (N) shall apply;
E : extension of the valve range;
+ : test to be carried out;
- : test not to be carried out.
The code numbers following the + indicate which modified component of the valve initiates testing:
Code 1 : body
Code 2 : outlets
Code 3 : obturator
Code 4 : sealing element
Code 5 : spindle/drive
Code 6 : actuator
b
Recommended sampling procedure for a testing laboratory working on behalf of a certification body. Testing undertaken
in a manufacturer laboratory can be taken into account, by prior acceptance by the certification body.
c
Valves shall contain components from each PA-U cavity. The minimum number of samples shall be at least one from each
cavity.
d
Only applicable for valves with a spigot end of size groups 2 and 3.
e
If agreed between the manufacturer and the end-user an additional test can be carried out to check the initiating torque
after a specified time in a closed position under pressure.
f
The multiple tests shall be carried out at least 24 h after completion of the pressure test, if not otherwise specified by the
manufacturer.
g
Reference for BRT and PVT at the manufacturer.
h
For CEN, the additional regional requirement according to ISO 16486-4:2022, Table 1, footnote j, with link to its subclause
8.4 is required.
6.3 Batch release testing
Batch release testing is intended to demonstrate via short-term testing the ability of the products to be
placed on the market, assuming that the PVT has proven the stability of the process.
Those characteristics specified in ISO 16486-1 to ISO 16486-5 and listed in Tables 8 to 11 shall be
subject to BRTs with the minimum sampling frequency as given in Tables 8 to 11, as applicable.
A batch release test may be performed by the manufacturer or outsourced on behalf of the manufacturer.
NOTE If certification is involved, the certification body can request the location of the test.
The manufacturer shall specify a batch in a quality plan.
A batch shall only be released for supply when all the relevant tests and inspections have been carried
out at the specified frequencies and the requirements have been met.
If a product fails in respect of any characteristic given in Tables 8 to 11, as applicable, the batch shall be
rejected or the retest procedures shall be performed for the characteristic on which the product failed.
The retest procedure shall be as follows:
— Find the last and the first product which conforms to the requirements as specified in Tables 8 to 11.
— Release all products produced before and after these points and reject the products produced
between these points.
Procedures for dealing with rejected products shall be detailed in the manufacturer’s quality plan.
Table 8 — Characteristics of compounds and minimum sampling frequencies for BRTs by the
compound manufacturer
a
Characteristic Reference Minimum sampling frequency
Compound density ISO 16486-1:2020, 1 test piece/batch/but at least every
5.2.5 7 days
b
Viscosity number ISO 16486-1:2020, 1 test piece/batch/but at least every
5.2.5 7 days
c
Water content ISO 16486-1:2020, 1 test piece/batch/but at least every
5.2.5 7 days
d
Carbon black content ISO 16486-1:2020, 1 test piece/batch/but at least every
5.2.5 7 days
d
Carbon black dispersion ISO 16486-1:2020, 1 test piece/batch/but at least every
5.2.5 7 days
e
Pigment dispersion ISO 16486-1:2020, 1 test piece/ batch/but at least every
5.2.5 7 days
a
The number of samples given in the table is the minimum. All samples shall pass the
relevant test(s).
b
Reference for BRT and PVT at the manufacturer.
c
Only applicable if the requirement for volatile content is not conformed to
...
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