EN ISO 13479:2009
(Main)Polyolefin pipes for the conveyance of fluids - Determination of resistance to crack propagation - Test method for slow crack growth on notched pipes (ISO 13479:2009)
Polyolefin pipes for the conveyance of fluids - Determination of resistance to crack propagation - Test method for slow crack growth on notched pipes (ISO 13479:2009)
ISO 13479:2009 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 13479:2009)
Diese Internationale Norm 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 > 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 13479:2009)
L'ISO 13479:2009 spécifie une méthode de détermination de la résistance des tubes en polyoléfine à la propagation lente d'une fissure, exprimée en fonction du temps de rupture, sous une contrainte hydrostatique, d'un tube entaillé longitudinalement par usinage sur sa surface extérieure. L'essai est applicable aux tubes de plus de 5 mm d'épaisseur.
Cevi iz poliolefinov za transport tekočin - Ugotavljanje odpornosti proti širjenju razpoke - Metoda za preskus počasnega širjenja razpoke na zarezani cevi (ISO 13479:2009)
Ta mednarodni standard opredeljuje preskusno metodo ugotavljanja odpornosti proti počasnemu širjenju razpoke cevi iz poliolefinov, izraženo v potrebnem času do uničenja, ob preskusnem hidrostatičnem tlaku na cevi s strojno obdelanimi longitudinalnimi zarezami na zunanji površini. Preskus velja za cevi z debelino stene, večjo od 5 mm.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2010
1DGRPHãþD
SIST EN ISO 13479:1999
&HYLL]SROLROHILQRY]DWUDQVSRUWWHNRþLQ8JRWDYOMDQMHRGSRUQRVWLSURWLãLUMHQMX
UD]SRNH0HWRGD]DSUHVNXVSRþDVQHJDãLUMHQMDUD]SRNHQD]DUH]DQLFHYL ,62
Polyolefin pipes for the conveyance of fluids - Determination of resistance to crack
propagation - Test method for slow crack growth on notched pipes (ISO 13479:2009)
Rohre aus Polyolefinen für den Transport von Fluiden - Bestimmung des Widerstandes
gegen Rißfortpflanzung - Prüfverfahren für langsames Rißwachstum an gekerbten
Rohren (Kerbprüfung) (ISO 13479:2009)
Tubes en polyoléfines pour le transport des fluides - 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 13479:2009)
Ta slovenski standard je istoveten z: EN ISO 13479:2009
ICS:
23.040.20 Cevi iz polimernih materialov Plastics pipes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 13479
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2009
ICS 23.040.20 Supersedes EN ISO 13479:1997
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 13479:2009)
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 Rißfortpflanzung -
fissure - Méthode d'essai de la propagation lente de la Prüfverfahren für langsames Rißwachstum an gekerbten
fissure d'un tube entaillé (essai d'entaille) (ISO 13479:2009) Rohren (Kerbprüfung) (ISO 13479:2009)
This European Standard was approved by CEN on 19 August 2009.
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 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 Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 13479:2009: E
worldwide for CEN national Members.
Contents Page
Foreword .3
Foreword
This document (EN ISO 13479:2009) 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 March 2010, and conflicting national standards shall be withdrawn at
the latest by March 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 13479:1997.
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, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 13479:2009 has been approved by CEN as a EN ISO 13479:2009 without any modification.
INTERNATIONAL ISO
STANDARD 13479
Second edition
2009-09-15
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 13479:2009(E)
©
ISO 2009
ISO 13479:2009(E)
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ii © ISO 2009 – All rights reserved
ISO 13479:2009(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 13479 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.
This second edition cancels and replaces the first edition (ISO 13479:1997), which has been technically
revised.
INTERNATIONAL STANDARD ISO 13479:2009(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 International Standard 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 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 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 6108, Double equal angle cutters with plain bore and key drive
ISO 11922-1, Thermoplastics pipes for the conveyance of fluids — Dimensions and tolerances — Part 1:
Metric series
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 161-1 and ISO 11922-1 apply.
4 Principle
Lengths of pipe with four machined longitudinal external notches are 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 It is assumed that the following test parameters are set by the standard or specification making reference to
this International Standard:
a) the number of test pieces, if applicable (see 6.5);
b) the test pressure (see 8.1);
c) the test period (see 8.1).
ISO 13479:2009(E)
5 Apparatus
5.1 Pipe pressure-testing equipment, as specified in ISO 1167-1.
5.2 Notch-machining equipment, i.e. 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.
The mandrel shall support the pipe bore beneath and along the full length of the notch to be machined.
The milling cutter mounted on a horizontal arbor shall be a 60° included-angle V-cutter conforming to
ISO 6108, having a cutting rate of (0,010 ± 0,002) (mm/r)/tooth (see example).
EXAMPLE A cutter with 20 teeth rotating at 700 r/min, traversed at a speed of 150 mm/min, has a cutting rate of
150/(20 × 700) = 0,011 (mm/r)/tooth.
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 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 each 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.
6 Test piece preparation
6.1 General
Prior to any measurements the test piece shall be conditioned at (23 ± 2) °C for at least 4 h.
6.2 Test pieces
Each test piece shall comprise a length of pipe sufficient to give a minimum free length of pipe of (3d ± 5) mm
n
between the end caps, when fitted for pressure testing in accordance with ISO 1167-2, where d is the
n
nominal outside diameter of the pipe. For pipes with a nominal outside diameter d > 315 mm, a minimum free
n
length of (3d ± 5) mm shall be used where practicable; otherwise, a minimum free length of greater than or
n
equal to 1 000 mm shall be used. Type A end caps in accordance with ISO 1167-1 shall be used.
NOTE The use of pipes less than (3d ± 5) mm and notch lengths of less than the nominal outside diameter is subject
n
to further study.
6.3 Notch location and measurement of dimensions
Positions shall be marked for machining four notches equally spaced around the pipe circumference (see
Figure 1). Measure the mean outside diameter, d , of the test pipe and the wall thickness of the pipe in the
em
centre of the pipe at each notch position in accordance with ISO 3126.
6.4 Machining the notches
6.4.1 If the wall thickness of the test piece is greater than 50 mm, the material shall be machined with a slot
drill of 15 mm to 20 mm diameter to leave approximately 10 mm to be removed by the V-cutter, used in
accordance with 6.4.2.
6.4.2 Each notch shall be machined by climb milling (see Figure 2) to such a depth as to produce a pipe
wall ligament thickness of between 0,78 and 0,82 times the minimum wall thickness, as specified in
ISO 11922-1, for the diameter and pressure series of the pipe as shown in Table A.1 (see Note in this
subclause). The ends of each notch shall be aligned circumferentially as shown in Figure 1 and Figure 2.
2 © ISO 2009 – All rights reserved
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