SIST EN ISO 13479:2022
(Main)Polyolefin pipes for the conveyance of fluids - Determination of resistance to crack propagation - Test method for slow crack growth on notched pipes (ISO 13479:2022)
Polyolefin pipes for the conveyance of fluids - Determination of resistance to crack propagation - Test method for slow crack growth on notched pipes (ISO 13479:2022)
This document specifies a test method for determining the resistance to slow crack growth of polyolefin pipes, expressed in terms of time to failure in a hydrostatic pressure test on a pipe with machined longitudinal notches in the outside surface. The test is applicable to pipes of wall thickness greater than 5 mm.
Rohre aus Polyolefinen für den Transport von Fluiden - Bestimmung des Widerstandes gegen Rissfortpflanzung - Prüfverfahren für langsames Risswachstum an gekerbten Rohren (Kerbprüfung) (ISO 13479:2022)
Dieses Dokument legt ein Prüfverfahren zur Bestimmung des Widerstandes gegen langsames Risswachstum von Rohren aus Polyolefinen fest, ausgedrückt als Versagenszeit bei einer Prüfung unter hydrostatischem Druck an einem Rohr mit in die Außenoberfläche eingefrästen Längskerben. Die Prüfung ist anwendbar für Rohre mit einer Wanddicke größer 5 mm.
Tubes en polyoléfines pour le transport des fluides - Détermination de la résistance à la propagation de la fissure - Méthode d’essai de la propagation lente de la fissure d’un tube entaillé (essai d’entaille) (ISO 13479:2022)
Le présent document spécifie une méthode de détermination de la résistance des tubes en polyoléfine à la propagation lente d’une fissure, exprimée en fonction du temps à la rupture, lors d’un essai de pression hydrostatique sur un tube entaillé longitudinalement par usinage sur sa surface extérieure. L’essai est applicable aux tubes ayant une épaisseur de paroi supérieure à 5 mm.
Cevi iz poliolefinov za transport tekočin - Ugotavljanje odpornosti proti širjenju razpoke - Metoda za preskus počasnega širjenja razpoke na zarezani cevi (ISO 13479:2022)
Ta dokument določa preskusno metodo za ugotavljanje odpornosti proti počasnemu širjenju razpok v poliolefinskih ceveh, ki je izražena v času za odpoved pri hidrostatičnem tlačnem preskusu na cevi s strojno izdelanimi vzdolžnimi zarezami na zunanji površini. Preskus se uporablja za cevi z debelino stene nad 5 mm.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2022
Nadomešča:
SIST EN ISO 13479:2010
Cevi iz poliolefinov za transport tekočin - Ugotavljanje odpornosti proti širjenju
razpoke - Metoda za preskus počasnega širjenja razpoke na zarezani cevi (ISO
13479:2022)
Polyolefin pipes for the conveyance of fluids - Determination of resistance to crack
propagation - Test method for slow crack growth on notched pipes (ISO 13479:2022)
Rohre aus Polyolefinen für den Transport von Fluiden - Bestimmung des Widerstandes
gegen Rissfortpflanzung - Prüfverfahren für langsames Risswachstum an gekerbten
Rohren (Kerbprüfung) (ISO 13479:2022)
Tubes en polyoléfines pour le transport des fluides - Détermination de la résistance à la
propagation de la fissure - Méthode d’essai de la propagation lente de la fissure d’un
tube entaillé (essai d’entaille) (ISO 13479:2022)
Ta slovenski standard je istoveten z: EN ISO 13479:2022
ICS:
23.040.20 Cevi iz polimernih materialov Plastics pipes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 13479
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2022
EUROPÄISCHE NORM
ICS 23.040.20 Supersedes EN ISO 13479:2009
English Version
Polyolefin pipes for the conveyance of fluids -
Determination of resistance to crack propagation - Test
method for slow crack growth on notched pipes (ISO
13479:2022)
Tubes en polyoléfines pour le transport des fluides - Rohre aus Polyolefinen für den Transport von Fluiden -
Détermination de la résistance à la propagation de la Bestimmung des Widerstandes gegen
fissure - Méthode d'essai de la propagation lente de la Rissfortpflanzung - Prüfverfahren für langsames
fissure d'un tube entaillé (essai d'entaille) (ISO Risswachstum an gekerbten Rohren (Kerbprüfung)
13479:2022) (ISO 13479:2022)
This European Standard was approved by CEN on 19 May 2022.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13479:2022 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 13479:2022) 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 December 2022, and conflicting national standards
shall be withdrawn at the latest by December 2022.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 13479:2009.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 13479:2022 has been approved by CEN as EN ISO 13479:2022 without any modification.
INTERNATIONAL ISO
STANDARD 13479
Third edition
2022-06
Polyolefin pipes for the conveyance of
fluids — Determination of resistance
to crack propagation — Test method
for slow crack growth on notched
pipes
Tubes en polyoléfines pour le transport des fluides — Détermination
de la résistance à la propagation de la fissure — Méthode d'essai de la
propagation lente de la fissure d'un tube entaillé (essai d'entaille)
Reference number
ISO 13479:2022(E)
ISO 13479:2022(E)
© ISO 2022
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
ISO 13479:2022(E)
Contents Page
Foreword .iv
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
3.1 Terms related to geometrical dimensions . 1
3.2 Terms related to machining of notches . 2
4 Symbols and abbreviation .3
4.1 Symbols . 3
4.2 Abbreviated terms . 3
5 Principle .3
6 Apparatus .4
7 Test piece preparation .4
7.1 General . 4
7.2 Test pieces . . 5
7.3 Notch location and measurement of dimensions . 5
7.4 Machining the notches . 5
7.5 Number of test pieces . 7
8 Conditioning .7
9 Procedure .7
9.1 Hydrostatic-pressure testing . 7
9.2 Ligament thickness measurement after testing . 7
10 Test report .8
Annex A (normative) Ligament thicknesses .10
Annex B (informative) Test-pressure levels for polyethylene .13
Annex C (informative) Recommended requirements for polyethylene .14
Annex D (normative) Test procedure for the accelerated notched pipe test (ANPT) for PE
100-RC pipes .15
Annex E (normative) Method of measuring notch radius .18
Bibliography .19
iii
ISO 13479:2022(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.
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 5, General properties of pipes, fittings and valves of plastic
materials and their accessories -- Test methods and basic specifications, 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).
This third edition cancels and replaces the second edition (ISO 13479:2009), which has been technically
revised.
The main changes are as follows:
— warnings have been added to follow the method of test piece preparation and the test procedure
because of the influence on the result;
— a maximum notch radius has been specified;
— in case of premature failure, alternative test pressures and times for PE 80 and PE 100 have been
added to allow retesting at a lower pressure for a longer time;
— an accelerated method by testing with an external detergent has been added.
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
INTERNATIONAL STANDARD ISO 13479:2022(E)
Polyolefin pipes for the conveyance of fluids —
Determination of resistance to crack propagation — Test
method for slow crack growth on notched pipes
1 Scope
This document specifies a test method for determining the resistance to slow crack growth of polyolefin
pipes, expressed in terms of time to failure in a hydrostatic pressure test on a pipe with machined
longitudinal notches in the outside surface. The test is applicable to pipes of wall thickness greater than
5 mm.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 161-1, Thermoplastics pipes for the conveyance of fluids — Nominal outside diameters and nominal
pressures — Part 1: Metric series
ISO 1167-1, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of
the resistance to internal pressure — Part 1: General method
ISO 1167-2, Thermoplastics pipes, fittings and assemblies for the conveyance of fluids — Determination of
the resistance to internal pressure — Part 2: Preparation of pipe test pieces
ISO 3126, Plastics piping systems — Plastics components — Determination of dimensions
ISO 11922-1, Thermoplastics pipes for the conveyance of fluids — Dimensions and tolerances — Part 1:
Metric series
ISO 15510, Stainless steels — Chemical composition
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 161-1 and ISO 11922-1 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 Terms related to geometrical dimensions
3.1.1
nominal outside diameter
d
n
specified outside diameter assigned to a nominal size DN/OD
Note 1 to entry: Nominal outside diameter is expressed in millimetres.
ISO 13479:2022(E)
3.1.2
mean outside diameter
d
em
value of the measurement of the outer circumference of the pipe or spigot end of a fitting in any cross-
section divided by π (= 3,142), rounded to the next greater 0,1 mm
3.1.3
minimum wall thickness
e
min
minimum value for the wall thickness at any point around the circumference of a component, as
specified
3.1.4
standard dimension ratio
SDR
numerical designation of a pipe series, which is a convenient round number, approximately equal to the
dimension ratio of the nominal outside diameter, d , and the nominal wall thickness, e
n n
3.1.5
pipe series
number for pipe designation
Note 1 to entry: Pipe series values are defined according to ISO 4065.
Note 2 to entry: The relationship between the pipe series, S, and the standard dimension ratio, SDR, is given in
ISO 4065 as follows.
SDR−1
S=
3.1.6
ligament thickness
δ
lg
value of the measurement or calculation of the remaining ligament after machining of the notch
3.1.7
notch depth
h
value of the depth of the notch after machining, measured or calculated
3.1.8
notch length
l
n
value of the length of the notch
3.1.9
width of machined surface of notch
b
s
value of the width of the machined surface of the notch
3.2 Terms related to machining of notches
3.2.1
climb milling
milling in which the cutting motion of the tool is in the same direction as the feeding direction of the
component being milled
Note 1 to entry: This is also referred to as ‘down milling’.
ISO 13479:2022(E)
3.2.2
revolution of the cutter
r
value used as a basis for the cutting rate
4 Symbols and abbreviation
4.1 Symbols
For the purposes of this document, the following symbols apply.
b width of machined surface of the notch
s
d mean outside diameter
em
d nominal outside diameter
n
e wall thickness (at any point) of a pipe
e mean wall thickness
m
e maximum wall thickness (at any point) of a pipe
max
e minimum wall thickness (at any point) of a pipe
min
h notch depth
l notch length
n
p test pressure
r revolution of the cutter
δ ligament thickness
lg
σ hydrostatic stress, in megapascals
4.2 Abbreviated terms
ANPT accelerated notch pipe test
PE polyethylene
RC raised crack resistance
S pipe series
SDR standard dimension ratio
5 Principle
A length of pipe with four machined longitudinal external notches is subject to a hydrostatic pressure
test whilst immersed in a water tank at 80 °C in accordance with ISO 1167-1 and ISO 1167-2. The time to
failure or test period is recorded.
NOTE 1 It is assumed that the following test parameters are set by the standard or specification making
reference to this test method:
a) the number of test pieces, if applicable (see 7.5);
ISO 13479:2022(E)
b) the test pressure (see 9.1);
c) the test period (see 9.1).
To accelerate the test, the pipe with external machined notches is immersed in a tank containing a
® 1)
detergent, for example Arkopal N100 , in accordance with Annex D.
6 Apparatus
6.1 Pipe pressure-testing equipment, as specified in ISO 1167-1.
NOTE Ideally when testing notched pipes, it is recommended to use a single test station. Furthermore, it
is recommended to use automated shut off equipment for each individual pipe when testing multiple pipes on
a manifold. Otherwise, when a pipe fails, the other pipes are disturbed, and re-pressurizing can accelerate any
crack growth present in the notches.
6.2 Notch machining equipment, for example a milling machine with a horizontal mandrel rigidly
fixed to the bed to enable the pipe to be securely clamped to give a straight test piece.
Alternatively, the pipe to be notched can also be fixed from the outside with suitable clamps to keep it
in a stable position to avoid vibrations during the notching process.
The milling cutter mounted on a horizontal arbor shall be a 60° double equal angle V-cutter with a
pointed tip, having a calculated cutting rate of (0,010 ± 0,002) (mm/r)/tooth (see example).
It is important that the cutting rate is within the specified range, otherwise the results will not be valid.
EXAMPLE A cutter with 20 teeth rotating at 700 r/min, traversed at a speed of 150 mm/min, has a calculated
cutting rate of 150/(20 × 700) = 0,011 (mm/r)/tooth.
Vibration of the cutter or the machine bed can affect the radius formed at the bottom of the notch and
shall be minimized.
The milling cutter shall be carefully protected against damage. The cutter shall be subject to a running-
in treatment amounting to 10 m of notching at the specified cutting rate, prior to its first use for the
preparation of test pieces. It shall not be used for any other material or purpose and shall be replaced
after 500 m of notching.
The cutter shall be checked for damage or wear after not more than 100 m of cutting. The cutter teeth
shall be compared with a new cutter by examination with a microscope using a magnification of 10 to
20 times. If there is any evidence of damage or wear it shall be replaced.
The quality of the cutter and machining process can be checked by carrying out notching of a sample
and visually checking the notch tip radius after cutting the cross-section of the pipe. This shall be done
after installation of a new cutter.
6.3 End caps, type A in accordance with ISO 1167-1.
7 Test piece preparation
7.1 General
Prior to any measurements the test piece shall be
...
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