EN ISO 1746:2000
(Main)Rubber or plastics hoses and tubing - Bending tests (ISO 1746:1998, including technical corrigendum 1:1999)
Rubber or plastics hoses and tubing - Bending tests (ISO 1746:1998, including technical corrigendum 1:1999)
Gummi- oder Kunststoffschläuche mit und ohne Einlage - Biegeprüfungen (ISO 1746:1998, einschließlich technischen Corrigendum 1:1999)
Diese Internationale Norm legt zwei Verfahren fest zur Bestimmung des Verhaltensvon Gummi- oder Kunststoffschläuchen mit oder ohne Einlage unter Biegung bei einem festgelegten Radius. Verfahren A ist geeignet für Schläuche mit und ohne Einlage mit Innendurchmessern bis 80 mm. Die Abmessungen der Prüfeinrichtung zur Prüfung von Schläuchen mit und ohne Einlage größerer Innendurchmesser würden zu ausladend.
Tuyaux et tubes en caoutchouc ou en plastique - Essai de courbure (ISO 1746:1998, corrigendum technique 1:1999 compris)
La présente Norme internationale spécifie deux méthodes de détermination du comportement des tuyaux et tubes en caoutchouc ou en plastique lorsqu'ils sont courbés selon un rayon donné. La méthode A convient pour des tuyaux et tubes de diamètre intérieur inférieur ou égal à environ 80 mm; la taille de l'appareillage d'essai pour les tuyaux et tubes de dimensions supérieures devient excessive. Cette méthode permet également de mesurer la force requise pour obtenir un rayon de courbure donné, et l'essai peut être effectué à une pression interne donnée. Avec la méthode B, les caractéristiques de courbure, y compris la force requise pour obtenir la courbure, peuvent être déterminées dans une plage de températures allant de - 60 °C à + 200 °C. Cependant, du fait de sa nature, l'appareillage ne peut être utilisé que pour des tuyaux et tubes de faible diamètre intérieur, jusqu'à environ 12,5 mm.
Rubber or plastics hoses and tubing - Bending tests (ISO 1746:1998, including technical corrigendum 1:1999)
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Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2000
Rubber or plastics hoses and tubing - Bending tests (ISO 1746:1998, including
technical corrigendum 1:1999)
Rubber or plastics hoses and tubing - Bending tests (ISO 1746:1998, including technical
corrigendum 1:1999)
Gummi- oder Kunststoffschläuche mit und ohne Einlage - Biegeprüfungen (ISO
1746:1998, einschließlich technischen Corrigendum 1:1999)
Tuyaux et tubes en caoutchouc ou en plastique - Essai de courbure (ISO 1746:1998,
corrigendum technique 1:1999 compris)
Ta slovenski standard je istoveten z: EN ISO 1746:2000
ICS:
23.040.70 Gumene cevi in armature Hoses and hose assemblies
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
INTERNATIONAL ISO
STANDARD 1746
Third edition
1998-05-15
Rubber or plastics hoses and tubing —
Bending tests
Tuyaux et tubes en caoutchouc ou en plastique — Essais de courbure
A
Reference number
ISO 1746:1998(E)
ISO 1746:1998(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.
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.
International Standard ISO 1746 was prepared by Technical Committee
ISO/TC 45, Rubber and rubber products, Subcommittee SC 1, Hoses
(rubber and plastics).
This third edition cancels and replaces the second edition (ISO 1746:1983),
which has been technically revised.
© ISO 1998
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet central@iso.ch
X.400 c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
ii
©
INTERNATIONAL STANDARD ISO ISO 1746:1998(E)
Rubber or plastics hoses and tubing — Bending tests
WARNING — Persons using this International Standard should be familiar with normal laboratory practice.
This standard does not purport to address all of the safety problems, if any, associated with its use. It is the
responsibility of the user to establish appropriate safety and health practices and to ensure compliance
with any national regulatory conditions.
1 Scope
This International Standard specifies two methods for the determination of the behaviour of rubber or plastics hoses
or tubing when bent to a specified radius.
Method A is suitable for hoses and tubing of internal diameter up to about 80 mm; the size of the apparatus for
testing hoses and tubing of larger bore sizes becomes excessive. The method also provides a means of measuring
the force required to reach a specified bend radius, and the test may be carried out at a specified internal pressure.
In method B, the bending characteristics, including the force required for bending, may be determined over a range
of temperatures from - 60 �C to + 200 �C. The nature of the apparatus, however, limits its applicability to hoses and
tubing of small internal diameter, i.e. up to about 12,5 mm.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, the editions indicated were valid. All standards are subject to
revision, and parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
ISO 471:1995, Rubber — Temperatures, humidities and times for conditioning and testing.
1)
ISO 4671:— , Rubber and plastics hose and hose assemblies — Methods of measurement of dimensions.
3 Method A
3.1 Apparatus
The apparatus consists of two guides A and B, guide A being fixed in a plane and guide B being movable in that
plane, parallel to, and in line with, guide A (see figure 1).
___________
1) To be published. (Revision of ISO 4671:1984)
©
ISO
ISO 1746:1998(E)
If it is desired to measure the force required to attain the specified radius of curvature, this may be done, for
example, by means of a system of pulleys and weights (see figure 2). Care shall be taken to minimize the effect of
frictional resistance.
3.2 Test pieces
3.2.1 Types and dimensions
The test pieces shall consist either of complete manufactured lengths of hose or of suitable test lengths. If the
manufactured length is shorter than the length required for the test, test pieces of adequate length shall be specially
manufactured.
3.2.2 Number
Unless otherwise specified, two test pieces shall be tested.
3.3 Conditioning of test pieces
No tests shall be carried out within 24 h of manufacture.
For evaluations which are intended to be comparable, the test shall, as far as possible, be carried out after the
same time interval after manufacture. ISO 471 shall be followed for time between sample manufacture and testing.
Before testing, test pieces shall be conditioned for at least 16 h at a standard laboratory temperature and humidity
(see ISO 471); this 16 h period may be part of the 24 h interval after manufacture.
3.4 Test procedure
3.4.1 I
...
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