SIST EN ISO 10931:2006

SLOVENSKI STANDARD
SIST EN ISO 10931:2006
01-april-2006
Cevni sistemi iz polimernih materialov za uporabo v industriji – Poli(viniliden
florid) (PVDF) – Zahteve za dele cevovoda in cevni sistem (ISO 10931:2005)
Plastics piping systems for industrial applications - Poly(vinylidene fluoride) (PVDF) -
Specifications for components and the system (ISO 10931:2005)
Kunststoff-Rohrleitungssysteme für industrielle Anwendungen - Polyvinyliden Fluoride
(PVDF) - Anforderungen an Rohrleitungsteile und das Rohrleitungssystem (ISO
10931:2005)
Systemes de canalisations en matieres plastiques pour les applications industrielles -
Poly(fluorure de vinylidene) (PVDF) - Spécifications pour les composants et le systeme
(ISO 10931:2005)
Ta slovenski standard je istoveten z: EN ISO 10931:2005
ICS:
23.040.01
SIST EN ISO 10931:2006 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN ISO 10931
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2005
ICS 23.040.01

English Version
Plastics piping systems for industrial applications -
Poly(vinylidene fluoride) (PVDF) - Specifications for components
and the system (ISO 10931:2005)
Systèmes de canalisations en matières plastiques pour les Kunststoff-Rohrleitungssysteme für industrielle
applications industrielles - Poly(fluorure de vinylidène) Anwendungen - Polyvinyliden Fluorid - Anforderungen an
(PVDF) - Spécifications pour les composants et le système Rohrleitungsteile und das Rohrleitungssystem (ISO
(ISO 10931:2005) 10931:2005)
This European Standard was approved by CEN on 28 November 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10931:2005: E
worldwide for CEN national Members.

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EN ISO 10931:2005 (E)




Foreword



This document (EN ISO 10931:2005) 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 June 2006, and conflicting national standards shall be withdrawn at
the latest by June 2006.

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 ZA, 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, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.


Endorsement notice

The text of ISO 10931:2005 has been approved by CEN as EN ISO 10931:2005 without any modifications.


2

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EN ISO 10931:2005 (E)


ANNEX ZA
(informative)

Relationship between this International Standard and the Essential
Requirements of EU Directive 97/23/EC (PED)


By agreement between ISO and CEN, this CEN annex is included in the DIS and the FDIS but will not
appear in the published ISO standard.


This International Standard has been prepared under a mandate given to CEN by the European Commission
and the European Free Trade Association to provide one means of conforming to Essential Requirements of
the New Approach Directive 97/23 EC, Pressure Equipment Directive (PED).

Once this standard is cited in the Official Journal of the European Communities under that Directive and has
been implemented as a national standard in at least one Member State, compliance with the normative
clauses of this standard given in Table ZA.1 confers, within the limits of the scope of this standard, a
presumption of conformity with the corresponding Essential Requirements of that Directive and associated
EFTA regulations.

Table ZA.1 — Correspondence between this International Standard and Directive 97/23/EC (PED)

Clauses/subclauses of this Essential requirements (Ers) of Qualifying remarks/Notes
International Standard EU Directive 97/23/EC
5.2; 8.1; 14 Design for adequate strength 2.2.1
18 Traceability 3.1.5
A.1.2; A.3.1; A.5 Hydrostatic test pressure 3.2.2
5 Materials 4.1, 4.2 a)
14 Design of piping system 6 a), b), c)

WARNING: Other requirements and other EU Directives may be applicable to the product(s) falling within
the scope of this standard.

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INTERNATIONAL ISO
STANDARD 10931
First edition
2005-12-01

Plastics piping systems for industrial
applications — Poly(vinylidene fluoride)
(PVDF) — Specifications for components
and the system
Systèmes de canalisations en matières plastiques pour les applications
industrielles — Poly(fluorure de vinylidène) (PVDF) — Spécifications
pour les composants et le système




Reference number
ISO 10931:2005(E)
©
ISO 2005

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ISO 10931:2005(E)
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ii © ISO 2005 – All rights reserved

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ISO 10931:2005(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 2
3 Terms and definitions. 3
4 Symbols and abbreviated terms . 6
5 Material . 7
6 General characteristics — Appearance. 9
7 Geometrical characteristics. 9
8 Mechanical characteristics . 10
9 Physical characteristics. 11
10 Chemical characteristics . 11
11 Electrical characteristics . 11
12 Performance requirements . 11
13 Classification of components. 12
14 Design of a thermoplastics piping system for industrial applications . 12
15 Installation of piping systems . 13
16 Declaration of compliance with this International Standard. 13
17 Marking . 13
18 Manufacture. 15
Annex A (informative) Specific characteristics and requirements for industrial piping systems
made from poly(vinylidene fluoride) (PVDF). 16
Bibliography . 34

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ISO 10931:2005(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 10931 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 first edition of ISO 10931 cancels and replaces ISO 10931-1:1997, ISO 10931-2:1997, ISO 10931-3:1996,
ISO 10931-4:1997 and ISO 10931-5:1998, of which it constitutes a technical revision.
iv © ISO 2005 – All rights reserved

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ISO 10931:2005(E)
Introduction
This International Standard specifies the characteristics and requirements for a piping system and its
components made from poly(vinylidene fluoride) (PVDF) intended to be used for industrial applications,
above-ground, by authorities, design engineers, certification bodies, inspection bodies, testing laboratories,
manufacturers and users.
At the date of publication of this International Standard, International Standards for piping systems of other
plastics used for industrial applications were ISO 15493, for acrylonitrile-butadiene-styrene (ABS),
unplasticized poly(vinyl chloride) (PVC-U), chlorinated poly(vinyl chloride) (PVC-C) and ISO 15494, for
polybutene (PB), polyethylene (PE), polypropylene (PP).
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INTERNATIONAL STANDARD ISO 10931:2005(E)

Plastics piping systems for industrial applications —
Poly(vinylidene fluoride) (PVDF) — Specifications for
components and the system
IMPORTANT — Requirements for industrial valves are given in this International Standard and/or in
other International Standards. Valves may be used with components conforming to this International
Standard provided they conform additionally to its relevant requirements. Where existent, 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. 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 the
relevant requirements of this International Standard.
1 Scope
This International Standard specifies the characteristics and requirements for components such as pipes,
fittings and valves made from poly (vinylidene fluoride) (PVDF), intended to be used for thermoplastics piping
systems in the field of industrial applications above-ground.
It is applicable to PVDF pipes, fittings, valves and ancillary equipment, their joints and to joints with
components 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 matters in fluids for industrial applications
including
⎯ chemical plants,
⎯ industrial sewerage engineering,
⎯ power engineering (cooling and general purpose water),
⎯ electroplating and pickling plants,
⎯ semiconductor industry,
⎯ agricultural production plants, and
⎯ water treatment.
This International Standard is applicable to PVDF piping systems for use at temperatures up to 150 °C.
However, for applications above 120 °C, which depend upon the crystalline melting point of the PVDF material,
it is advisable to seek the advice of the manufacturer of the component (the components have to withstand the
mechanical, thermal and chemical demands to be expected and to be resistant to the fluids to be conveyed).
Characteristics and requirements which are applicable for PVDF in general are covered by the relevant
clauses of this International Standard. Those characteristics and requirements which depend on the material
used are given in Annex A.
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ISO 10931:2005(E)
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 7-1, Pipe threads where pressure-tight joints are made on the threads — Part 1: Dimensions, tolerances
and designation
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 1043-1, Plastics — Symbols and abbreviated terms — Part 1: Basic polymers and their special
characteristics
ISO 1167:1996, Thermoplastics pipes for the conveyance of fluids — Resistance to internal pressure — Test
method. Incorporating ISO 1167:1996/Cor 1:1997
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 components — Determination of dimensions
ISO 4065, Thermoplastics pipes — Universal wall thickness table
ISO 9080:2003, 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 11357-3, Plastics — Differential scanning calorimetry (DSC) — Part 3: Determination of temperature and
enthalpy of melting and crystallization
ISO 11922-1:1997, Thermoplastics pipes for the conveyance of fluids — Dimensions and tolerances — Part 1:
Metric series
ISO 12092:2000, 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 15853:1999, Thermoplastic materials — Preparation of tubular test pieces for the determination of the
hydrostatic strength of materials used for injection moulding
ISO 12162:1995, Thermoplastics materials for pipes and fittings for pressure applications — Classification and
designation — Overall service (design) coefficient
2 © ISO 2005 – All rights reserved

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ISO 10931:2005(E)
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
ISO 21787, Industrial valves — Globe valves of thermoplastics materials
IEC 60364-1, Electrical installations of buildings — Part 1: Scope, object and fundamental principles
IEC 60449, Voltage bands for electrical installations of buildings
IEC 60529, Degrees of protection provided by enclosures (IP-code)
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 472 and ISO 1043-1, and 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 ,
em,min
in 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
measured outside diameter through the cross-section at any point of a pipe or the spigot end of a fitting,
rounded up to the next 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 next 0,1 mm
3.1.4
mean inside diameter of a socket
arithmetical mean of two measured inside diameters perpendicular to each other

1) To be published.
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ISO 10931:2005(E)
3.1.5
nominal size of flange
DN
numerical designation of the size of a flange, used for reference purposes and related to the manufacturing
dimension in millimetres
3.1.6
out-of-roundness
〈pipe/spigot end of fitting〉 difference between the measured maximum outside diameter and the measured
minimum outside diameter in the same cross section of a pipe or the spigot end of a fitting
3.1.7
out-of-roundness
〈socket〉 difference between the measured maximum inside diameter and the measured minimum inside
diameter in the same cross section of a socket
3.1.8
nominal wall thickness
e
n
wall thickness, in millimetres, corresponding to the minimum wall thickness, e
min
3.1.9
wall thickness at any point
e
measured wall thickness at any point around the circumference of a component, rounded up to the next
0,1 mm
3.1.10
pipe series S
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 a given pipe geometry as shown in Equation (1):
de−
nn
S = (1)
2e
n
NOTE 2 Flanges are designated on the basis of PN.
3.1.11
standard dimension ratio
SDR
ratio of the nominal outside diameter, d , of a pipe to its nominal wall thickness, e
n n
NOTE According to 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 Material definitions
3.2.1
virgin material
material in a form such as granules or powder that has not been subjected to use or processing other than
that required for its manufacture and to which no reprocessable or recyclable materials have been added
4 © ISO 2005 – All rights reserved

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ISO 10931:2005(E)
3.2.2
own reprocessable material
material prepared from rejected unused pipes, fittings and valves, including trimmings from the production of
pipes, fittings and valves, that will be reprocessed in a manufacturer's plant after having been previously
processed by the same manufacturer by a process such as moulding or extrusion and for which the complete
formulation or material specification is known
NOTE Only those thermoplastics parts of valves made from material conforming to this International Standard are
used.
3.3 Definitions related to material characteristics
3.3.1
lower confidence limit
σ
LCL
quantity, expressed in megapascals, which can be considered as a material property, representing the 97,5 %
lower confidence limit of the predicted long-term hydrostatic strength for water at a given temperature, T, and
time, t
3.3.2
minimum required strength
MRS
value of σ for water at 20 °C for 50 years, rounded to the next lower value of the R10 series when σ is
LCL LCL
less than 10 MPa, or to the next lower value of the R20 series when σ is W 10 MPa
LCL
NOTE The R10 and R20 series are given in ISO 3 and ISO 497.
3.3.3
design stress
σ
s
allowable stress, in megapascals, for a given application or service condition
NOTE It is derived by dividing the MRS by the coefficient C, as given in Equation (3), then rounding to the next lower
value of the R10 series or R 20 series, as applicable:
MRS
σ = (3)
s
C
3.3.4
overall service coefficient
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
3.4 Definitions related to service conditions
3.4.1
nominal pressure
PN
numerical designation used for reference purposes related to the mechanical characteristics of the
components of a piping system
NOTE 1 A pressure, in bar, with the numerical value of PN is identical to the pressure, p , as defined by
s
EU Directive 97/23/ECC (PED), if both pressures are taken at 20 °C.
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ISO 10931:2005(E)
NOTE 2 For plastics piping systems conveying water, it corresponds to the maximum continuous operating pressure, in
bar, which can be sustained for water at 20 °C for 50 years, based on the minimum overall service/design coefficient and
calculated using Equation (4):
10σσ20
ss
PN= =  (4)
SSDR−1
where
σ is the design stress, expressed in newtons per square millimetre;
s

2)
PN is expressed in bar .
3.4.2
hydrostatic stress
σ
stress induced in the wall of a pipe when an internal hydrostatic pressure is applied
NOTE 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 Equation (5):
em
de−
em
σ= p (5)
2e
NOTE Equation (5) is applicable for pipes only.
3.4.3
long-term hydrostatic stress
constant hydrostatic stress that is maintained in a component during a sustained period of time
4 Symbols and abbreviated terms
4.1 Symbols
C overall service (design) coefficient (design factor)
d nominal outside diameter of the test piece
d outside diameter (at any point)
e
d mean outside diameter
em
d nominal outside diameter
n
DN nominal size of flange
e wall thickness (at any point)
e nominal wall thickness
n
l free length
0
p internal hydrostatic pressure
p maximum allowable pressure
s

2 5 2
2) 1 bar = 0,1 MPa = 0,1 N/mm = 10 N/m .
6 © ISO 2005 – All rights reserved

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ISO 10931:2005(E)
T temperature
t time
ρ material density
σ hydrostatic stress
σ lower confidence limit
LCL
σ design stress
s
4.2 Abbreviations
MOP maximum operating pressure
MRS minimum required strength
PN nominal pressure
PS maximum allowable pressure
PT test pressure
PVDF poly(vinylidene fluoride)
S pipe series S
SDR standard dimension ratio
5 Material
5.1 General
The PVDF material from which the components are made shall be homopolymer resin.
NOTE Only homopolymers are covered by this edition of ISO 10931. It is intended that copolymer materials also be
covered at a later date.
5.2 Hydrostatic strength properties
The material shall be evaluated according to ISO 9080 where a pressure test is carried out according to
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 10.
Conformity of PVDF to the reference curves given in Annex A shall be proved according to that annex. At
least 97,5 % of the data points shall be on or above the reference curves.
The material shall be classified by the raw material producer.
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, the test piece shall
be an injection-moulded or extruded test piece in the form of a pipe (see Figure 1) where a test pressure is
applied according to ISO 1167. The free length l shall be 3d , as defined in ISO 15853.
0 n
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ISO 10931:2005(E)

Key
1 end cap
2 injection-moulded end
Figure 1 — Free length l of test pieces
0
5.3 Material characteristics
The details of the material characteristics of PVDF are given in Annex A.
5.4 Reprocessable and recyclable material
The use of own reprocessable material obtained during the production and testing of components according to
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.
5.5 Materials for parts not made from PVDF
5.5.1 General
All components shall conform to the relevant International Standard(s). Alternative standards may be applied
in cases where a suitable International Standar
...