BS ISO 10619-3-2011 Rubber and plastics hoses and tubing Measurement of flexibility and stiffness Bending tests at high and low temperatures《橡胶或塑料软管和管件 曲挠性和刚性的测量 高温和低温弯曲试验》.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 10619-3:2011Rubber and plastics hoses andtubing Measurement offlexibility and stiffnessPart 3: Bending tests at high and lowtemperaturesBS ISO 10619-3:2011 BRITISH STANDAR

2、DNational forewordThis British Standard is the UK implementation of ISO 10619-3:2011.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/66/-/4, Rubber and plastics tubing, hoses and hoseassemblies - Methods of test.A list of organizations represented on this committee ca

3、n beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 65423 7ICS 23.040.70Compliance with a British Standard cannot confer immunity fromlegal obligation

4、s.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 December 2011.Amendments issued since publicationDate Text affectedBS ISO 10619-3:2011Rubber and plastics hoses and tubing Measurement of flexibility and stiffness Part 3: Bending tests at h

5、igh and low temperaturesTuyaux et tubes en caoutchouc et en plastique Mesurage de la flexibilit et de la rigidit Partie 3: Essais de courbure des tempratures basses et leves ISO 2011Reference numberISO 10619-3:2011(E)First edition2011-12-01ISO10619-3INTERNATIONAL STANDARDBS ISO 10619-3:2011ISO 10619

6、-3:2011(E)COPYRIGHT PROTECTED DOCUMENT ISO 2011All 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 either ISO at the

7、address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in Switzerlandii ISO 2011 All rights reservedBS ISO 10619-3:2011ForewordISO (the Internati

8、onal 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

9、 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 standa

10、rdization.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 vo

11、ting. 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 suc

12、h patent rights.ISO 10619-3 was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 1, Hoses (rubber and plastics).ISO 10619 consists of the following parts, under the general title Rubber and plastics hoses and tubing Measurement of flexibility and stiffness: Part

13、 1: Bending tests at ambient temperature Part 2: Bending tests at sub-ambient temperatures Part 3: Bending tests at high and low temperaturesISO 10619-3:2011(E) ISO 2011 All rights reserved iiiBS ISO 10619-3:2011IntroductionThis method was originally included in ISO 17461). This part of ISO 10619 al

14、lows for samples to be tested at sub-ambient temperatures and at elevated temperatures of up to 200 C.1) Withdrawn.ISO 10619-3:2011(E)iv ISO 2011 All rights reservedBS ISO 10619-3:2011INTERNATIONAL STANDARD ISO 10619-3:2011(E)Rubber and plastics hoses and tubing Measurement of flexibility and stiffn

15、ess Part 3:Bending tests at high and low temperaturesWARNING Persons using this part of ISO 10619 should be familiar with normal laboratory practice. This part of ISO 10619 does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user t

16、o establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions.1 ScopeThis part of ISO 10619 specifies a method for the determination of the bending characteristics of rubber and plastics hoses and tubing, including the force required for bending

17、, over a range of temperatures from 60 C to +200 C. The nature of the apparatus, however, limits its applicability to rubber and plastics hoses and tubing of small internal diameter, i.e. up to 12,5 mm.2 Normative referencesThe following referenced documents are indispensable for the application of

18、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 4671, Rubber and plastics hoses and hose assemblies Methods of measurement of the dimensions of hoses and the lengths of h

19、ose assembliesISO 8330, Rubber and plastics hoses and hose assemblies VocabularyISO 23529, Rubber General procedures for preparing and conditioning test pieces for physical test methods3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 8330 and the follo

20、wing apply.3.1bendingshaping or forcing something straight into a curve or angle at a specified temperature3.2flexibilityease of bending a hose without it being damaged by kinking, collapse, breaking or crackingNOTE A hose can be bent around a mandrel, for example.3.3stiffnessresistance of a hose to

21、 bending ISO 2011 All rights reserved 1BS ISO 10619-3:20114 Method4.1 Apparatus4.1.1 Compression testing machine, with a rate of travel of the moving jaw of 100 mm/min, preferably provided with a chart recorder. A scale, graduated in millimetre divisions, may be attached to the moving jaw to enable

22、the bend diameter to be measured or, preferably, this may be determined from a graphical record or other measuring device.4.1.2 Pair of twin channel-shaped holders, fitted with end stops for the hose test pieces (see Figure 1).4.1.3 Thermostatically controlled environmental chamber, which can be fit

23、ted to the testing machine with the provision for access to enable the external diameter of the hose to be measured.4.2 Hose test pieces4.2.1 Types and dimensionsThe test shall be carried out on two hose pieces (one set), of equal length, of the hose or tubing under test. The length of the hose test

24、 pieces depends on the dimensions of the hose test piece holders and shall be 2 G + 0,5 (C+D), where G is the length of the hose test piece holders (see Figure 1) and C is twice the minimum bend radius specified in the appropriate specification. In no case shall the hose test pieces come into contac

25、t with the walls of the chamber and the length, L, shall always be less than the length of the enclosure.4.2.2 Number of hose test piecesUnless otherwise specified, three sets of tests shall be carried out (one set being two hose test pieces).4.3 Conditioning of hose test piecesNo test shall be carr

26、ied 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. The time between sample manufacture and testing shall be in conformity with ISO 23529.Before testing, the hose te

27、st pieces shall be conditioned in the straight condition or conforming to their natural curvature for 5 h in the environmental chamber (4.1.3) at the specified temperature (see 4.4).4.4 Test temperatureThe test temperature is specified in the appropriate hose specification.4.5 Test procedure4.5.1 Wh

28、ere testing is being done on samples conditioned to sub-ambient temperatures, the following test should be completed within 8 s to 12 s. Testing on samples conditioned at higher temperatures should be completed within 5 s and the test equipment should be conditioned to the same temperature as the te

29、st piece. 4.5.2 Measure the outside diameter, D, three times at the midpoint of the test pieces in the unstressed condition by means of a suitable measuring instrument as specified in ISO 4671. A total of three readings per set for each test piece shall be taken and the average of these should be us

30、ed for the value of Di.4.5.3 Install the test piece between the holders with a large bend radius and the ends of the test pieces against the end stops. The curvature shall follow the natural curvature, if any.ISO 10619-3:2011(E)2 ISO 2011 All rights reservedBS ISO 10619-3:20114.5.4 Start the machine

31、. Apply force between A and B (Figure 1) and determine the force required to reach twice the specified bend radius.4.5.5 Divide the force value obtained by direct reading or from a graphical record by two to obtain the bending force for a single test piece.4.5.6 Measure the outside dimension, T (see

32、 Figure 1) at the smallest diameter in the curved part of the hose. Six readings should be taken and the average of these should be used for the value of Ti.5 Expression of resultsCalculate the value Ti/Diusing the mean values obtained.Where Tiis the outside diameter measured (see Figure 1) when the

33、 hose sample has been bent to its minimum bend radius and Diis the outside diameter of the hose measured at the midpoint of the sample in the unstressed state.Compare the result with the permitted deformation given in the appropriate hose specification.6 Test reportThe test report shall include the

34、following information:a) a reference to this part of ISO 10619, i.e. ISO 10619-3:2011;b) details of the method used;c) a full description of the hose or tubing tested and a reference to the hose specification in accordance with which the hose was tested;d) the test temperature;e) observation on any

35、abrupt change(s) in hose section or irregularity in curvature caused by kinking;f) the value of Di, Tiand Ti/Di;g) whether or not Ti/Diwas within the permitted deformation;h) the force required to reach the specified bend radius, if appropriate; i) the date of the test.ISO 10619-3:2011(E) ISO 2011 A

36、ll rights reserved 3BS ISO 10619-3:2011Key1 part A2 twin channel-shaped holders for hose sample3 part BC twice the minimum bend radiusG length of test piece holders0,5 G half the length of the test piece holdersL length of hose sample installed in the apparatus where L is less than the length of the

37、 heating or cooling chamberT smallest diameter on the curvature of the hoseFigure 1 Schematic arrangement for testISO 10619-3:2011(E)4 ISO 2011 All rights reservedBS ISO 10619-3:2011BS ISO 10619-3:2011ISO 10619-3:2011(E) ISO 2011 All rights reservedICS 23.040.70Price based on 4 pagesThis page delibe

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