EN ISO 9969:2007
(Main)Thermoplastics pipes - Determination of ring stiffness (ISO 9969:2007)
Thermoplastics pipes - Determination of ring stiffness (ISO 9969:2007)
ISO 9969:2007 specifies a test method for determining the ring stiffness of thermoplastics pipes having a circular cross section.
Thermoplastische Rohre - Bestimmung der Ringsteifigkeit (ISO 9969:2007)
Diese Internationale Norm legt ein Prüfverfahren zur Bestimmung der Ringsteifigkeit von thermoplastischen Rohren mit rundem Querschnitt fest.
Tubes en matières thermoplastiques - Détermination de la rigidité annulaire (ISO 9969:2007)
L'ISO 9969:2007 spécifie une méthode de détermination de la rigidité annulaire des tubes thermoplastiques de section circulaire.
Plastomerne cevi - Določevanje obodne togosti (ISO 9969:2007)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2008
1DGRPHãþD
SIST EN ISO 9969:1997
3ODVWRPHUQHFHYL'RORþHYDQMHRERGQHWRJRVWL ,62
Thermoplastics pipes - Determination of ring stiffness (ISO 9969:2007)
Thermoplastische Rohre - Bestimmung der Ringsteifigkeit (ISO 9969:2007)
Tubes en matieres thermoplastiques - Détermination de la rigidité annulaire (ISO
9969:2007)
Ta slovenski standard je istoveten z: EN ISO 9969:2007
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 9969
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2007
ICS 23.040.20 Supersedes EN ISO 9969:1995
English Version
Thermoplastics pipes - Determination of ring stiffness (ISO
9969:2007)
Tubes en matières thermoplastiques - Détermination de la Thermoplastische Rohre - Bestimmung der Ringsteifigkeit
rigidité annulaire (ISO 9969:2007) (ISO 9969:2007)
This European Standard was approved by CEN on 7 December 2007.
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
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EUROPÄISCHES KOMITEE FÜR NORMUNG
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© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 9969:2007: E
worldwide for CEN national Members.
Contents Page
Foreword.3
Foreword
This document (EN ISO 9969:2007) 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 2008, and conflicting national standards shall be withdrawn at
the latest by June 2008.
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 9969:1995.
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 9969:2007 has been approved by CEN as a EN ISO 9969:2007 without any modification.
INTERNATIONAL ISO
STANDARD 9969
Second edition
2007-12-15
Thermoplastics pipes — Determination of
ring stiffness
Tubes en matières thermoplastiques — Détermination de la rigidité
annulaire
Reference number
ISO 9969:2007(E)
©
ISO 2007
ISO 9969:2007(E)
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ISO 9969:2007(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 9969 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 9969:1994), which has been technically
revised.
INTERNATIONAL STANDARD ISO 9969:2007(E)
Thermoplastics pipes — Determination of ring stiffness
1 Scope
This International Standard specifies a test method for determining the ring stiffness of thermoplastics pipes
having a circular cross section.
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 3126, Plastics piping systems ― Plastics components ― Determination of dimensions
3 Symbols
For the purposes of this document, the following symbols apply.
Units
d nominal diameter of pipe mm
n
d inside diameter of pipe mm
i
e construction height mm
c
F force (of loading) kN
L length of the test piece mm
p pitch of ribs or windings mm
S ring stiffness kN/m
y vertical deflection mm
4 Principle
The ring stiffness is determined by measuring the force and the deflection while deflecting the pipe at a
constant deflection speed.
A cut length of pipe supported horizontally is compressed vertically between two parallel flat plates moved at a
constant speed that is dependent upon the diameter of the pipe.
A plot of force versus deflection is generated. The ring stiffness is calculated as a function of the force
necessary to produce a 3 % diametric deflection of the pipe.
NOTE It is assumed that the test temperature is set by the referring standard, if appropriate (see 8.1).
ISO 9969:2007(E)
5 Apparatus
5.1 Compressive testing machine, capable of a constant rate of crosshead movement, via a pair of
parallel plates (5.2), as appropriate to the nominal diameter of the pipe in conformance with Table 1, with
sufficient force and travel to produce the specified diametric deflection (see Clause 8).
Table 1 — Deflection speeds
Nominal diameter, d , of pipe Deflection speed
n
mm mm/min
d u 100 2 ± 0,1
n
100 < d u 200 5 ± 0,25
n
200 < d u 400 10 ± 0,5
n
400 < d u 710 20 ± 1
n
a
d > 710 0,03 × d ± 5 %
n i
a
d shall be determined in accordance with 6.3.
i
5.2 A pair of hard and rigid plates, through which the testing machine can apply the necessary force, F,
to the test piece.
The plates shall have flat, smooth and clean surfaces for contact with the test piece.
The
...
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