1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Rubber and plastics hoses and tubing - Measurement of flexibility and stiffnessPart 2: Bending tests at sub-ambient temperaturesBS EN ISO 10619-2:2018National forewordThis British Standard is the UK implementation of EN
2、 ISO 10619-2:2018. It is identical to ISO 10619-2:2017. It supersedes BS EN ISO 10619-2:2011, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/66, Rubber and plastics tubing, hoses and hose assemblies.A list of organizations represented on this comm
3、ittee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 96983 6ICS 23.040
4、.70Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 10
5、619-2:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 10619-2February 2018ICS 23.040.70 Supersedes EN ISO 10619-2:2011EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN
6、Ref. No. EN ISO 10619-2:2018: EAll rights of exploitation in any form and by any means reserved worldwide for CEN national MembersRubber and plastics hoses and tubing - Measurement of flexibility and stiffness - Part 2: Bending tests at sub-ambient temperatures (ISO 10619-2:2017)Tuyaux et tubes en c
7、aoutchouc et en plastique - Mesurage de la flexibilit et de la rigidit - Partie 2: Essais de courbure des tempratures infrieures lambiante (ISO 10619-2:2017)Gummi- und Kunststoffschluche mit und ohne Einlage - Bestimmung der Biegsamkeit und Steifigkeit - Teil 2: Biegeprfungen bei Temperaturen unterh
8、alb der Umgebungstemperatur (ISO 10619-2:2017)This European Standard was approved by CEN on 11 December 2017.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 altera
9、tion. 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 b
10、y 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,
11、Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN ISO 106
12、19-2:2018 (E)European forewordThis document (EN ISO 10619-2:2018) has been prepared by Technical Committee ISO/TC 45“Rubber and plastics hoses and hose assemblies” in collaboration with Technical Committee CEN/TC 218 “Rubber and plastics hoses and hose assemblies” the secretariat of which is held by
13、 BSI.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 August 2018, and conflicting national standards shall be withdrawn at the latest by August 2018.Attention is drawn to the possibility that some
14、 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 10619-2:2011.According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following
15、 countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norwa
16、y, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO 10619-2:2017 has been approved by CEN as EN ISO 10619-2:2018 without any modification.2BS EN ISO 10619-2:2018ISO 10619-2:2017Foreword iv1 Scope . 12 N
17、ormative references 13 Terms and definitions . 14 Method A . 24.1 General . 24.2 Apparatus 24.3 Hose test piece 24.3.1 Type . 24.3.2 Number of hose test pieces . 24.4 Test temperature . 24.5 Procedure 34.6 Expression of results 34.7 Test report . 35 Method B . 45.1 General . 45.2 Apparatus 45.3 Hose
18、 test pieces 45.4 Test temperature . 45.5 Procedure 45.6 Test report . 56 Method C 56.1 General . 56.2 Apparatus 56.3 Hose test piece 56.4 Test temperature . 56.5 Procedure 66.6 Expression of results 66.7 Test report . 7 ISO 2017 All rights reserved iiiContents PageBS EN ISO 10619-2:2018ISO 10619-2:
19、2017ForewordISO (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
20、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 matt
21、ers 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 doc
22、ument 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 s
23、uch 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 do
24、es not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trad
25、e (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 45, Rubber and rubber products, Subcommittee SC 1, Rubber and plastics hoses and hose assemblies.This second edition cancels and replaces the first edition (ISO 10619-2:2011), of whi
26、ch it constitutes a minor revision. The changes compared to the previous edition are as follows: the unit used in the formula to calculate the flexural stiffness in 6.5 and 6.6 has been changed.A list of all parts in the ISO 10619 series can be found on the ISO website.iv ISO 2017 All rights reserve
27、dBS EN ISO 10619-2:2018Rubber and plastics hoses and tubing - Measurement of flexibility and stiffness Part 2: Bending tests at sub-ambient temperaturesWARNING Persons using this document should be familiar with normal laboratory practice. This document does not purport to address all of the safety
28、problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and health practices.1 ScopeThis document specifies two methods for measuring the stiffness and one method for the determination of the flexibility of rubber and plastics hoses and tubing
29、when they are bent to a specific radius at sub-ambient temperatures.Method A is suitable for non-collapsible rubber and plastics hoses and tubing with a bore of up to and including 25 mm. This method provides a means of measuring the stiffness of the hose or tubing when the temperature is reduced fr
30、om a standard laboratory temperature.Method B is suitable for rubber and plastics hoses and tubing with a bore of up to 100 mm and provides a means of assessing the flexibility of the hose or tubing when bent around a mandrel at a specified sub-ambient temperature. It can also be used as a routine q
31、uality control test.Method C is suitable for rubber and plastics hoses and tubing with a bore of 100 mm and greater. This method provides a means of measuring the stiffness of the hose and tubing at sub-ambient temperatures. This method is only suitable for hoses and tubing which are non-collapsible
32、.2 Normative referencesThe 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
33、 any amendments) applies.ISO 1402, Rubber and plastics hoses and hose assemblies Hydrostatic testingISO 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 th
34、e purposes of this document, the terms and definitions given in ISO 8330 and the following apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.electropedia.org/ ISO Online browsing platform: available at
35、https:/www.iso.org/obp3.1bendingshaping or forcing something straight into a curve or angle at a specified temperatureINTERNATIONAL STANDARD ISO 10619-2:2017 ISO 2017 All rights reserved 1BS EN ISO 10619-2:2018ISO 10619-2:20173.2flexibilityease of bending (3.1) a hose without it being damaged by kin
36、king, collapse, breaking or crackingNote 1 to entry: A hose can be bent around a mandrel, for example.3.3stiffnessresistance of a hose to bending (3.1)4 Method A4.1 GeneralThis method applies to non-collapsible hoses with a bore of up to and including 25 mm only.4.2 Apparatus4.2.1 Torque wheel, havi
37、ng a diameter equal to twice the minimum bend radius specified for the hose, provided with equipment for holding the hose tangential to the wheel, a suitable device to bend the hose around the wheel, and a strain gauge and graphical recorder to measure the torque with an accuracy of 3 % (see Figure
38、1). If the minimum bend radius is not specified, the torque wheel shall have a diameter equal to 12 times the nominal bore of the hose (see Figure 1).4.2.2 Cooling container, equipped with an agitator, a temperature-measuring device and a roller having a diameter of 50 mm for guiding the hose (see F
39、igure 1). The coolant shall not affect the hose under test and shall be used as prescribed in ISO 23529. A suitable coolant liquid is methanol or ethanol with crushed dry ice (solid carbon dioxide) added. Gaseous coolants may be employed when the design of the apparatus is such that the tests using
40、such coolants give results equivalent to those obtained with liquid coolants.4.3 Hose test piece4.3.1 TypeThe hose test pieces shall be cut from the hose under test and shall have a length equal to:2 piRd+()(1)whereR is the minimum bend radius as specified in the relevant hose product standard;d is
41、the hose bore.4.3.2 Number of hose test piecesAt least three hose test pieces shall be used for each test.No test shall be carried out less than 24 h after manufacture of the hose.4.4 Test temperatureThe test shall be conducted at one of the following temperatures:0 C 2 C2 ISO 2017 All rights reserv
42、edBS EN ISO 10619-2:2018ISO 10619-2:201710 C 2 C25 C 2 C40 C 2 C55 C 2 Cor any other sub-ambient temperature as defined in the relevant product standard.4.5 ProcedureClamp one end of the hose test piece (4.3) on the wheel (4.2.1), with the rest of the test piece straight. If the hose has natural cur
43、vature, this curvature shall follow that of the wheel.Without coolant in the container (4.2.2), determine the torque required to bend the test specimen through 180 round the wheel at the standard temperature chosen from those given in ISO 23529. The time for bending shall be (12 2) s. Repeat the tes
44、t with the container filled with coolant at the chosen test temperature (see 4.4). Condition the hose test piece in a cold chamber at the test temperature for 24 h followed by conditioning at the test temperature in the apparatus for at least 30 min before testing.4.6 Expression of resultsFor each h
45、ose test piece, calculate the mean torque at the standard temperature and the mean torque at the test temperature by calculating the mean of the peak values contained in the central 50 % of the respective torque traces.Calculate the stiffness, S, expressed as the ratio of the mean torque at the test
46、 temperature to that at the standard temperature, from Formula (2):STT=ot(2)whereTtis the torque at the test temperature (mean value from three tests);Tois the torque at the standard temperature (mean value from the three tests).If the individual values for the three test specimens do not agree to w
47、ithin 15 % of the mean value at each temperature, the test shall be repeated.4.7 Test reportThe test report shall include the following:a) reference to this document, i.e. ISO 10619-2:2017;b) a full description of the hose and its origin;c) the dimensions of the hose test pieces;d) the coolant used;
48、e) the standard temperature and the test temperature;f) the torque at the standard temperature, To, and at the test temperature, Tt;g) the calculated value of the stiffness, S;h) the date of the test. ISO 2017 All rights reserved 3BS EN ISO 10619-2:2018ISO 10619-2:20175 Method B5.1 GeneralThis metho
49、d applies to hoses and tubing with a bore size of up to 100 mm only.5.2 Apparatus5.2.1 Mandrel, having an outside diameter equal to twice the minimum bend radius specified for the hose, or a former, with an arc of at least 180. If the minimum bend radius is not specified, the mandrel or former shall have an outside diameter equal to 12 times the bore of the hose.5.2.2 Conditioning chamber, capable of being maintained at the specified temperature (see 5.4).5.2.3 For hoses with a bore greater than 22 mm that need
