EN ISO 15494:2003

SLOVENSKI STANDARD
01-oktober-2003
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Plastics piping systems for industrial applications - Polybutene (PB), polyethylene (PE)
and polypropylene (PP) - Specifications for components and the system - Metric series
(ISO 15494:2003)
Kunststoff-Rohrleitungssysteme für industrielle Anwendungen - Polybuten (PB),
Polyethylen (PE) und Polypropylen (PP) - Anforderungen an Rohrleitungsteile und das
Rohrleitungssystem - Metrische Reihen (ISO 15494:2003)
Systemes de canalisations en matieres plastiques pour les applications industrielles -
Polybutene (PB), polyéthylene (PE) et polypropylene (PP) - Spécifications pour les
composants et le systeme - Série métrique (ISO 15494:2003)
Ta slovenski standard je istoveten z: EN ISO 15494:2003
ICS:
23.040.01
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 15494
NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2003
ICS 23.040.01
English version
Plastics piping systems for industrial applications - Polybutene
(PB), polyethylene (PE) and polypropylene (PP) - Specifications
for components and the system - Metric series (ISO
15494:2003)
Systèmes de canalisations en matières plastiques pour les Kunststoff-Rohrleitungssysteme für industrielle
applications industrielles - Polybutène (PB), polyéthylène Anwendungen - Polybuten (PB), Polyethylen (PE) und
(PE) et polypropylène (PP) - Spécifications pour les Polypropylen (PP) - Anforderungen an Rohrleitungsteile
composants et le système - Série métrique (ISO und das Rohrleitungssystem - Metrische Reihen (ISO
15494:2003) 15494:2003)
This European Standard was approved by CEN on 11 March 2003.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, 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
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15494:2003 E
worldwide for CEN national Members.

CORRECTED  2003-07-02
Foreword
This document (EN ISO 15494:2003) has been prepared by Technical Committee ISO/TC 138
"Plastics pipes, fittings and valves for the transport of fluids" in collaboration with Technical
Committee CEN/TC 155 "Plastics piping systems and ducting systems", the secretariat of which
is held by NEN.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by October 2003, and conflicting national
standards shall be withdrawn at the latest by October 2003.
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 EU
Directive(s).
For relationship with EU Directive(s), see informative Annex ZB, 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, Czech
Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and
the United Kingdom.
Endorsement notice
The text of ISO 15494:2003 has been approved by CEN as EN ISO 15494:2003 without any
modifications.
NOTE Normative references to International Standards are listed in Annex ZA (normative).
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of
any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications, indicated
by (mod.), the relevant EN/HD applies.
Publication Year Title EN/HD Year
ISO 179-2 1997 Plastics - Determination of Charpy impact EN ISO 179-2 1999
properties - Part 2: Instrumented impact test
ISO 228-1 2000 Pipe threads where pressure-tight joints are EN ISO 228-1 2003
not made on the threads - Part 1:
Dimensions, tolerances and designation
ISO 472 1999 Plastics - Vocabulary EN ISO 472 2001
ISO 1043-1 2001 Plastics - Symbols and abbreviated terms - EN ISO 1043-1 2001
Part 1: Basic polymers and their special
characteristics
ISO 1133 1997 Plastics - Determination of the melt mass- EN ISO 1133 1999
flow rate (MFR) and the melt volume-flow
rate (MVR) of thermoplastics
ISO 9080 2003 Plastics piping and ducting systems - EN ISO 9080 2003
Determination of the long-term hydrostatic
strength of thermoplastics materials in pipe
form by extrapolation
ISO 12162 1995 Thermoplastics materials for pipes and EN ISO 12162 1995
fittings for pressure applications -
Classification and designation - Overall
service (design) coefficient
ISO 13478 1997 Thermoplastics materials for pipes and EN ISO 13478 1997
fittings for pressure applications -
Classification and designation - Overall
service (design) coefficient
Annex ZB
(informative)
Clauses of this Standard addressing essential requirements or other
provisions of EU Directives
This Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association. The following clauses of this standard mentioned in
this annex meet the requirements of the mandate given by EU Directive for Pressure Equipment
97/23/EC (PED).
WARNING: Other requirements and other EU Directives may be applicable to the
products falling within the scope of this standard.
Table ZA.1 - Clauses of this Standard addressing essential requirements of EU Directive
97/23/EC (PED)
Clause Requirement Clause of Annex I of the
PED
Annexes A, B and C Design for adequate strength 2.2.1
12 Permanent jointing 3.1.2
17 Traceability 3.1.5
8 and 12 Hydrostatic test pressure 3.2.2 and 7.4
5, 6 and 7 Materials 4.1, 4.2 a)
14 and 15 Design of piping system 6
Annexes A, B and C Allowable stresses 7
Compliance with these clauses of this standard provides one means of conforming with the
specific essential requirements of the EU Directive concerned and associated EFTA regulations.
NOTE Requirements of those clauses of Annex I of the PED that are not listed in Table ZA. 1
- are not applicable to components in accordance with this standard;
- could be applicable to the pressure equipment and have to be respected by the
industrial plant manufacturer and/or by the user of the components.
INTERNATIONAL ISO
STANDARD 15494
First edition
2003-04-15
Corrected version
2004-02-01
Plastics piping systems for industrial
applications — Polybutene (PB),
polyethylene (PE) and polypropylene
(PP) — Specifications for components and
the system ― Metric series
Systèmes de canalisations en matières plastiques pour les applications
industrielles — Polybutène (PB), polyéthylène (PE) et polypropylène
(PP) — Spécifications pour les composants et le système ― Série
métrique
Reference number
ISO 15494:2003(E)
©
ISO 2003
ISO 15494:2003(E)
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ii © ISO 2003 – All rights reserved

ISO 15494:2003(E)
Contents Page
Foreword . iv
Introduction. v
1 Scope. 1
2 Normative references. 2
3 Terms and definitions. 4
4 Symbols and abbreviated terms. 7
5 Material. 8
6 General characteristics. 10
7 Geometrical characteristics . 11
8 Mechanical characteristics. 12
9 Physical characteristics . 12
10 Chemical characteristics. 12
11 Electrical characteristics. 13
12 Performance requirements. 13
13 Classification of components . 14
14 Design of a thermoplastics piping system for industrial applications. 14
15 Installation of piping systems. 15
16 Declaration of compliance. 15
17 Marking. 15
Annex A (normative) Specific characteristics and requirements for industrial piping systems made
from polybutene (PB). 18
Annex B (normative) Specific characteristics and requirements for industrial piping systems made
from polyethylene (PE) . 32
Annex C (normative) Specific characteristics and requirements for industrial piping systems made
from polypropylene (PP). 59
Bibliography. 88

ISO 15494:2003(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 3.
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 International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 15494 was prepared by Technical Committee ISO/TC 138, Plastics pipes, fittings and valves for the transport
of fluids, Subcommittee SC 3, Plastics pipes and fittings for industrial applications.
This document has been prepared under a mandate given by the European Commission and the European Free
Trade Association and supports essential requirements of EU Directives.
At the date of publication of this International Standard, the following standards had been published for piping
systems, used for industrial applications, made from other types of plastic:
ISO 10931 (all parts), Plastics piping systems for industrial applications — Poly(vinylidene fluoride) (PVDF)
ISO 15493, Plastics piping systems for industrial applications — Acrylonitrile-butadiene-styrene (ABS),
unplasticized poly(vinyl chloride) (PVC-U) and chlorinated poly(vinyl chloride) (PVC-C) — Specifications for
components and the system — Metric series.
Annexes A, B and C form a normative part of this International Standard.
This corrected version of ISO 15494:2003 incorporates the following corrections:
 in Table A.1, footnote “c”, the reference to Table D.4 has been deleted;
 in Table C.2, footnote “c”, the reference to Table D.22 has been deleted.
iv © ISO 2003 – All rights reserved

ISO 15494:2003(E)
Introduction
This International Standard specifies the characteristics and requirements for a piping system and its components
made from polybutene (PB), polyethylene (PE) or polypropylene (PP), as applicable, intended to be used for
industrial applications above ground by authorities, design engineers, certification bodies, inspection bodies, test
laboratories, manufacturers and users.
INTERNATIONAL STANDARD ISO 15494:2003(E)

Plastics piping systems for industrial applications — Polybutene
(PB), polyethylene (PE) and polypropylene (PP) — Specifications
for components and the system ― Metric series
1 Scope
This International Standard specifies the characteristics and requirements for components such as pipes, fittings
and valves made from one of the following materials:
 polybutene (PB);
 polyethylene (PE);
 polypropylene (PP);
intended to be used for thermoplastics piping systems in above-ground industrial applications.
This International Standard is applicable to PB, PE or PP pipes, fittings, valves and ancillary equipment, to their
joints and to joints with components made of other plastics and non-plastics materials, depending on their
suitability, intended to be used for the conveyance of liquid and gaseous fluids as well as of solid matter in fluids for
industrial applications such as:
 chemical plants;
 industrial sewerage engineering;
 power engineering (cooling and general-purpose water supply);
 electroplating and pickling plants;
 the semiconductor industry;
 agricultural production plants;
 water treatment.
NOTE 1 Where relevant, national regulations for specific applications (e.g. water treatment) apply.
Other application areas are permitted if the requirements of this International Standard and/or applicable national
requirements are fulfilled.
Relevant regulations in respect of fire behaviour and explosion risk are applicable if applications are envisaged for
inflammable media.
The components have to withstand the mechanical, thermal and chemical demands to be expected and have to be
resistant to the fluids to be conveyed.
ISO 15494:2003(E)
Characteristics and requirements which are applicable to all three materials (PB, PE and PP) are covered by the
relevant clauses of this International Standard. Those characteristics and requirements which are dependent on the
material are given for each material in the relevant annex (see Table 1).
Table 1 — Material-specific annexes
Material Annex
Polybutene (PB) A
Polyethylene (PE) B
Polypropylene (PP) C
NOTE 2 Components conforming to any of the product standards listed in the bibliography or to national standards, as
applicable, may be used with components conforming to this International Standard provided they conform to the requirements
for joint dimensions and to the other relevant requirements of this standard.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments to, or revisions of, any of these
publications do not apply. However, parties to agreements based on this International Standard are encouraged to
investigate the possibility of applying the most recent editions of the normative documents indicated below. For
undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC
maintain registers of currently valid International Standards.
ISO 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances and
designation
ISO 179-2:1997, Plastics — Determination of Charpy impact properties — Part 2: Instrumented impact test
ISO 228-1, Pipe threads where pressure-tight joints are not made on the threads — Part 1: Dimensions, tolerances
and designation
ISO 265-1, Pipes and fittings of plastics materials — Fittings for domestic and industrial waste pipes — Basic
dimensions: Metric series — Part 1: Unplasticized poly(vinyl chloride) (PVC-U)
ISO 472, Plastics — Vocabulary
ISO 727-1, Fittings made from unplasticized poly(vinyl chloride) (PVC-U), chlorinated poly(vinyl chloride) (PVC-C)
or acrylonitrile/butadiene/styrene (ABS) with plain sockets for pipes under pressure — Part 1: Metric series
ISO 1043-1, Plastics — Symbols and abbreviated terms — Part 1: Basic polymers and their special characteristics
ISO 1133, Plastics — Determination of the melt mass-flow rate (MFR) and the melt volume-flow rate (MVR) of
thermoplastics
ISO 1167:1996, Thermoplastics pipes for the conveyance of fluids — Resistance to internal pressure — Test
method
ISO 1183-2, Plastics — Methods for determining the density of non-cellular plastics — Part 2: Density gradient
column method
ISO 2505-1:1994, Thermoplastics pipes — Longitudinal reversion — Part 1: Determination methods
ISO 2505-2:1994, Thermoplastics pipes — Longitudinal reversion — Part 2: Determination parameters
ISO 3126, Plastics piping systems — Plastics piping components — Measurement and determination of dimensions
2 © ISO 2003 – All rights reserved

ISO 15494:2003(E)
ISO 3213, Polypropylene (PP) pipes — Effect of time and temperature on expected strength
ISO 4065, Thermoplastics pipes — Universal wall thickness table
ISO 6964, Polyolefin pipes and fittings — Determination of carbon black content by calcination and pyrolysis —
Test method and basic specification
ISO 9080, Plastics piping and ducting systems — Determination of the long-term hydrostatic strength of
thermoplastics materials in pipe form by extrapolation
ISO/TR 10358, Plastics pipes and fittings — Combined chemical-resistance classification table
ISO/TR 10837, Determination of the thermal stability of polyethylene (PE) for use in gas pipes and fittings
ISO 11922-1:1997, Thermoplastics pipes for the conveyance of fluids — Dimensions and tolerances — Part 1:
Metric series
ISO 12092, Fittings, valves and other piping system components made of unplasticized poly(vinyl chloride)
(PVC-U), chlorinated poly(vinyl chloride) (PVC-C), acrylonitrile-butadiene-styrene (ABS) and acrylonitrile-styrene-
acrylester (ASA) for pipes under pressure — Resistance to internal pressure — Test method
ISO 12162, Thermoplastics materials for pipes and fittings for pressure applications — Classification and
designation — Overall service (design) coefficient
ISO 12230, Polybutene (PB) pipes — Effect of time and temperature on the expected strength
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 13478, Thermoplastics pipes for the conveyance of fluids — Determination of resistance to rapid crack
propagation (RCP) — Full-scale test (FST)
ISO 13949, Method for the assessment of the degree of pigment dispersion in polyolefin pipes, fittings and
compounds
ISO 15853, Thermoplastics materials — Preparation of tubular test pieces for the determination of the hydrostatic
strength of materials used for injection moulding
1)
ISO 16135:— , Industrial valves — Ball valves of thermoplastics materials
1)
ISO 16136:— , Industrial valves — Butterfly valves of thermoplastics materials
1)
ISO 16137:— , Industrial valves — Check valves of thermoplastics materials
1)
ISO 16138:— , Industrial valves — Diaphragm valves of thermoplastics materials
1)
ISO 16139:— , Industrial valves — Gate valves of thermoplastics materials
1)
ISO 21787:— , Industrial valves — Globe valves of thermoplastics materials
IEC 60364-1, Electrical installations of buildings — Part 1: Fundamental principles, assessment of general
characteristics, definitions
IEC 60449, Voltage bands for electrical installations of buildings
IEC 60529, Degrees of protection provided by enclosures (IP code) (Consolidated edition including Amendment 1)

1) To be published.
ISO 15494:2003(E)
3 Terms and definitions
For the purposes of this International Standard, the terms and definitions given in ISO 472 and ISO 1043-1, plus
the following apply.
3.1 Geometrical definitions
NOTE The symbols d and e correspond to d and e given in other International Standards such as ISO 11922-1.
e ey y
3.1.1
nominal outside diameter
d
n
specified outside diameter of a component, which is identical to the minimum mean outside diameter, d , in
em,min
millimetres
NOTE The nominal inside diameter of a socket is equal to the nominal outside diameter of the corresponding pipe.
3.1.2
outside diameter at any point
d
e
outside diameter measured through the cross-section at any point on a pipe, or the spigot end of a fitting, rounded
up to the nearest 0,1 mm
3.1.3
mean outside diameter
d
em
measured length of the outer circumference of a pipe, or the spigot end of a fitting, divided by π (≈ 3,142), rounded
up to the nearest 0,1 mm
3.1.4
mean inside diameter of a socket
d
im
arithmetic mean of two measured inside diameters perpendicular to each other
3.1.5
nominal size of flange
DN
numerical designation for the size of a flange for reference purposes, related to the manufactured dimension in
millimetres
3.1.6
out-of-roundness
difference between the measured maximum outside diameter and the measured minimum outside diameter in the
same cross-sectional plane of a pipe, or the spigot end of a fitting, or the difference between the measured
maximum inside diameter and the measured minimum inside diameter in the same cross-sectional plane of a
socket
3.1.7
nominal wall thickness
e
n
wall thickness, in millimetres, corresponding to the minimum wall thickness, e
min
3.1.8
wall thickness at any point
e
measured wall thickness at any point around the circumference of a component, rounded up to the nearest 0,1 mm
4 © ISO 2003 – All rights reserved

ISO 15494:2003(E)
3.1.9
pipe series
S
dimensionless number related to the nominal outside diameter, d , and the nominal wall thickness, e
n n
NOTE 1 The pipe series S is related to the pipe geometry as shown in equation (1):
de−
nn
S = (1)
2e
n
NOTE 2 Flanges are designated on the basis of PN.
3.1.10
standard dimension ratio
SDR
ratio of the nominal outside diameter, d , of a pipe to its nominal wall thickness, e
n n
NOTE In accordance with ISO 4065, the standard dimension ratio SDR and the pipe series S are related as shown in
equation (2):
SDR = 2S + 1 (2)
3.2 Definitions of materials
3.2.1
virgin material
material in a form such as granules or powder that has not been previously processed other than for compounding
and to which no reprocessable or recyclable materials have been added
3.2.2
reprocessable material
material prepared from clean unused rejected pipes, fittings or valves, produced in a manufacturer's plant by a
process such as moulding or extrusion, which will be reprocessed in the same plant and for which the complete
formulation or material specification is known
NOTE 1 Such material may include trimmings from the production of such pipes, fittings and valves.
NOTE 2 In the case of valves, only those thermoplastics parts which are made from material conforming to this International
Standard may be considered as reprocessable material.
3.3 Definitions related to material characteristics
3.3.1
lower confidence limit
σ
LCL
quantity with the dimensions of stress, expressed in megapascals, which can be considered as a property of the
material and represents the 97,5 % lower confidence limit of the predicted long-term hydrostatic strength at a given
temperature, T, and time, t, determined by pressurizing internally with water
3.3.2
minimum required strength
MRS
value of σ at 20 °C and 50 years, rounded down to the next lower value in the R 10 series when σ is less
LCL LCL
than 10 MPa, or to the next lower value in the R 20 series when σ is greater than or equal to 10 MPa
LCL
NOTE The R 10 and R 20 series are the Renard number series as defined in ISO 3 and ISO 497.
ISO 15494:2003(E)
3.3.3
design stress
σ
s
allowable stress, in megapascals, for a given application or set of service conditions
NOTE It is derived by dividing the MRS by the coefficient C, as in equation (3), then rounding to the next lower value in the
R 10 or R 20 series, as applicable:
MRS
σ = (3)
s
C
3.3.4
overall service (design) coefficient
C
overall coefficient, with a value greater than one, which takes into consideration service conditions as well as the
properties of the components of a piping system other than those represented in the lower confidence limit, σ
LCL
3.3.5
melt mass-flow rate
MFR
value relating to the viscosity of a molten plastics material at a specified temperature and rate of shear, expressed
in grams per ten minutes (g/10 min)
3.4 Definitions related to service conditions
3.4.1
nominal pressure
PN
numerical designation used for reference purposes and related to the mechanical characteristics of the
components of a piping system
NOTE 1 A pressure, in bars, numerically equal to PN is identical to the maximum allowable pressure, PS, as defined by
EU Directive 97/23/ECC (PED), if both pressures are taken at 20 °C.
NOTE 2 For plastics piping systems conveying water, PN corresponds to the maximum continous operating pressure in bars
which can be sustained for water at 20 °C for 50 years, based on the minimum overall service (design) coefficient and
calculated using the following equation:
10σσ20
ss
PN = = (4)
SSDR −1
where
 s is expressed in N/mm ;
s
2)
 PN is expressed in bars .
5 2
2) 1 bar = 0,1 MPa = 10 N/mm .
6 © ISO 2003 – All rights reserved

ISO 15494:2003(E)
3.4.2
hydrostatic stress
σ
stress induced in the wall of a pipe when an internal hydrostatic pressure is applied
NOTE 1 The hydrostatic stress, in megapascals, is related to the applied internal hydrostatic pressure, p, the wall thickness,
e, at any point and the mean outside diameter, d , of a pipe and calculated using the following equation:
em
de−
em
σ=×p (5)
2e
NOTE 2 Equation (5) is applicable to pipes only.
3.4.3
long-term hydrostatic stress
constant hydrostatic stress that is maintained in a component for a sustained period of time
4 Symbols and abbreviated terms
4.1 Symbols
C overall service (design) coefficient (design factor)
d outside diameter (at any point)
e
d mean outside diameter
em
d mean inside diameter of socket
im
d nominal outside diameter
n
DN nominal size of flange
e wall thickness (at any point)
e nominal wall thickness
n
l free length
p internal hydrostatic pressure
T temperature
t time
ρ density of material
σ hydrostatic stress
σ lower confidence limit
LCL
σ design stress
s
ISO 15494:2003(E)
4.2 Abbreviations
MFR melt mass-flow rate
MOP maximum operating pressure
MRS minimum required strength
OIT oxidation induction time
PB polybutene
PE polyethylene
PP polypropylene
PP-H polypropylene homopolymer
PP-B polypropylene block-copolymer
PP-R polypropylene random-copolymer
PN nominal pressure
PS maximum allowable pressure
PT test pressure (corresponds to the symbol p usually used)
S pipe series
SDR standard dimension ratio
TIR true impact rate
5 Material
5.1 General
The material from which the components are made shall be PB, PE or PP, as applicable, to which are added those
additives that are needed to facilitate the manufacture of pipes and fittings conforming to this International
Standard.
If additives are used, they shall be uniformly dispersed.
Additives shall not be used, separately or together, in quantities sufficient to impair the fabrication or fusion-jointing
characteristics of the components or to impair the chemical, physical or mechanical characteristics as specified in
this International Standard.
5.2 Hydrostatic strength properties
The material shall be evaluated in accordance with ISO 9080 where a pressure test is carried out in accordance
with ISO 1167 to find the MRS-value in accordance with ISO 12162. The test shall be carried out using test pieces
of pipe series S u 16.
Conformity of the relevant material to the reference curves given for PB (see Annex A), PE (see Annex B) and PP
(see Annex C) shall be demonstrated in accordance with the applicable annex to this International Standard. At
least 97,5 % of the data points shall be on or above the reference curves.
The material shall be as classified by the raw-material producer.
8 © ISO 2003 – All rights reserved

ISO 15494:2003(E)
Where fittings and valves are manufactured from the same material as pipes, the material classification shall be the
same as for pipes.
For the classification of a material intended only for the manufacture of fittings and valves, an injection-moulded or
extruded test piece in the form of a pipe shall be used (see Figure 1) and the test pressure applied in accordance
with ISO 1167. The free length l shall be 3d , as defined in ISO 15853.
0 n
Key
1 End cap
2 Injection-moulded end
Figure 1 — Free length, l , of test piece
5.3 Other characteristics of material
Details of requirements on other characteristics of PB, PE and PP material are given in the applicable annex to this
International Standard.
5.4 Reprocessable and recyclable material
The use of reprocessable material obtained during the production and testing of components in accordance with
this International Standard is permitted in addition to virgin material, provided that the requirements of this
International Standard are fulfilled.
Reprocessable material obtained from external sources and recyclable material shall not be used.
ISO 15494:2003(E)
5.5 Parts not made from PB, PE or PP
5.5.1 General
All components shall conform to the relevant International Standards. Alternative standards may be used in cases
where suitable International Standards do not exist. In all cases, the fitness for purpose of the components shall be
demonstrated.
Materials and constituent elements used in making a particular component (including rubber, greases and any
metal parts that may be used) shall have resistance to the external and internal environments which is comparable
to that of all other elements of the piping system.
Materials other than PB, PE or PP in contact with components conforming to this International Standard shall not
adversely effect the performance of the components or initiate stress cracking.
5.5.2 Metallic materials
All metal parts susceptible to corrosion shall be adequately protected.
When dissimilar metallic materials are used which can be in contact with moisture, steps shall be taken to avoid
galvanic corrosion.
5.5.3 Sealing materials
Sealing materials shall have no detrimental effects on the properties of the components, joints and assemblies.
5.5.4 Other materials
Greases or lubricants shall not exude onto fusion-jointing areas and shall not affect the long-term performance of
materials conforming to this International Standard.
6 General characteristics
6.1 Appearance
When viewed without magnification, the internal and external surfaces of the components shall be smooth, clean
and free from any scoring, cavities and other surface defects that would prevent conformity to this International
Standard. The components shall not contain visible impurities.
Each end of a component shall be square to its axis and shall be deburred.
6.2 Colour
The colour of the components will depend on the material used and shall be as given for PB, PE or PP in the
applicable annex to this International Standard.
NOTE Attention is drawn to the need to take account of any relevant legislation relating to the colour coding of piping in
respect of its purpose or contents for the location in which the components are intended to be used.
Components for external above-ground installations shall be adequately protected against UV radiation.
10 © ISO 2003 – All rights reserved

ISO 15494:2003(E)
7 Geometrical characteristics
7.1 General
Dimensions shall be measured in accordance with ISO 3126 at (23 ± 2) °C after the component has been
conditioned for at least 4 h. The measurements shall not be made less than 24 h after manufacture.
The illustrations given in this International Standard are schematic sketches only, to indicate the relevant
dimensions. They do not necessarily represent manufactured components. The dimensions given shall be
followed. Dimensions not given shall be as specified by the manufacturer.
7.2 Diameters and associated tolerances
For components made from PB, PE or PP, as applicable, the diameters and associated tolerances shall conform to
the applicable annex to this International Standard.
The out-of-roundness shall be measured at the point of manufacture.
7.3 Wall thicknesses and associated tolerances
For components made from PB, PE or PP, as applicable, the wall thicknesses and associated tolerances shall
conform to the applicable annex to this International Standard.
7.4 Angles
The permitted deviation from the nominal or declared angle of a non-linear fitting (i.e. the change in direction of the
axis of the flow through the fitting) is ± 2°.
NOTE The preferred nominal angle for a non-linear fitting is 45° or 90°.
7.5 Laying lengths
The laying lengths for fittings and valves shall be as declared by the manufacturer.
NOTE The laying lengths are intended to assist in the design of moulds and are not intended to be used for quality control
purposes. ISO 265-1 may be used as a guide.
7.6 Threads
Threads used for jointing shall conform to ISO 7-1. Where a thread is used as a fastening thread for jointing an
assembly (e.g. union nuts), a thread conforming to ISO 228-1 is preferred.
7.7 Mechanical fittings
Mechanical fittings such as adaptors, unions, compression fittings and reducing bushes may be used provided that
their joint dimensions are in accordance with the applicable dimensions of components conforming to this
International Standard.
7.8 Joint dimensions of valves
The joint dimensions of valves shall conform to the relevant dimensions of pipes and fittings conforming to this
International Standard.
ISO 15494:2003(E)
8 Mechanical characteristics
8.1 Resistance to internal pressure of components
Components shall withstand the hydrostatic stress induced by internal hydrostatic pressure without bursting or
leakage when tested in accordance with ISO 1167 (for fittings, together with ISO 12092) under the test conditions
specified for PB, PE or PP in the applicable annex to this International Standard.
8.2 Calculation of the test pressure for components
8.2.1 Pipes
The hydrostatic test pressure, PT, in bars, shall be determined for pipes using the following equation:
de−
em min
σ=×PT (6)
2e
min
where σ is the hydrostatic stress for PB, PE or PP as given in the applicable annex to this International Standard.
8.2.2 Fittings
The hydrostatic test pressure, PT, in bars, shall be determined for fittings using equation (7). For S and SDR, the
respective values for the corresponding pipe shall be taken.
10σ 20σ
PT== (7)
SSDR −1
8.2.3 Valves
The hydrostatic test pressure, PT, in bars, is defined for valves in ISO 16135, ISO 16136, ISO 16137, ISO 16138,
ISO 16139 or ISO 21787, as applicable, depending on the valve type.
9 Physical characteristics
The physical characteristics of components made from PB, PE or PP shall conform to the applicable annex to this
International Standard.
10 Chemical characteristics
10.1 Effects on the component material(s)
Where fluids other than water are to be conveyed, the effect of the fluid on the component material(s) may be
established by consulting the component manufacturer or by reference to ISO/TR 10358.
10.2 Effects on the fluids
Where fluids other than water are to be conveyed, the effect on the fluids may be established by consulting the
component manufacturer.
12 © ISO 2003 – All rights reserved

ISO 15494:2003(E)
11 Electrical characteristics
The electrical protection which has to be provided during the fusion-jointing process will depend on the
characteristics of the electrical power supply.
NOTE The component relevant to the fusion-jointing process is part of an electrical system defined in IEC 60364-1 and in
IEC 60449.
Protection against direct contact with live parts (live conductors) is required in accordance with IEC 60529. This
protection is a function of the work site conditions.
The surface finish of the terminal pins shall ensure minimum electrical resistance.
12 Performance requirements
12.1 General
When components made from the same material, conforming to this International Standard, are jointed to each
other, all pipes, fittings and valves, as well as the joints between them, shall conform to the requirements of the
applicable annex to this International Standard.
NOTE If test pressures defined for pipes are used for assemblies made from components of dissimilar materials (e.g.
threaded joints or flanged joints), the resulting strain exceeds the strain occurring under service conditions. These strains
inevitably cause leakage. Therefore, in this International Standard, the time-related strain behaviour of the assemblies is taken
into account and test pressures derived from the isochronous stress-strain diagram are used.
12.2 Preparation of test assemblies
12.2.1 General
The joints shall be tested using pipes and fittings conforming to this International Standard.
The preparation of test assemblies shall take into account tolerances related to component manufacture, field
assembly and the equipment used, ambient-temperature variations during installation and, where appropriate,
sealing material and associated tolerances.
Test assemblies for pressure tests shall be closed with pressuretight end-load-bearing end caps, plugs or flanges
which shall be provided with connections for the entry of water and release of air.
12.2.2 Heated-tool jointing
12.2.2.1 Butt fusion jointing
Pipes and spigot-ended fittings designed for jointing by butt fusion shall be prepared and assembled in accordance
with the manufacturer's instructions.
12.2.2.2 Socket fusion jointing
Pipes and fittings designed for jointing by socket fusion shall be prepared and assembled in accordance with the
manufacturer's instructions.
12.2.2.3 Saddle fusion jointing
Pipes and fittings designed for jointing by saddle fusion shall be prepared and assembled in accordance with the
manufacturer's instructions.
ISO 15494:2003(E)
12.2.3 Elec
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