1、General purpose rubber thread SpecificationBS ISO 20058:2017BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06 ISO 2017General purpose rubber thread SpecificationFils de caoutchouc pour usages gnraux SpcificationINTERNATIONAL STANDARDISO20058First edition2017-08Referen
2、ce numberISO 20058:2017(E)National forewordThis British Standard is the UK implementation of ISO 20058:2017.The UK participation in its preparation was entrusted to Technical Committee PRI/70, Elastomeric seals for joints in pipework and pipelines.A list of organizations represented on this committe
3、e 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 2017 Published by BSI Standards Limited 2017ISBN 978 0 580 88330 9ICS 83.140.99C
4、ompliance 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 30 September 2017.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS ISO 20058:201
5、7 ISO 2017General purpose rubber thread SpecificationFils de caoutchouc pour usages gnraux SpcificationINTERNATIONAL STANDARDISO20058First edition2017-08Reference numberISO 20058:2017(E)BS ISO 20058:2017ISO 20058:2017(E)ii ISO 2017 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published
6、in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission ca
7、n be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 20058:2017ISO 20058:2017(E)ii ISO 2017
8、All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2017, Published in SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the inte
9、rnet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyr
10、ightiso.orgwww.iso.orgISO 20058:2017(E)Foreword iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Rubber thread classification 15 Requirements 25.1 General . 25.2 Conventional count . 25.3 Metric yield or density . 25.4 Physical and mechanical properties . 25.5 Schwartz value 26 Pack
11、aging . 36.1 Packing . 36.2 Marking . 3Annex A (informative) Schwartz value . 4 ISO 2017 All rights reserved iiiContents PageBS ISO 20058:2017ISO 20058:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies).
12、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-g
13、overnmental, 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.The procedures used to develop this document and those intended for its further maintenance are described
14、 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 document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).Attention is drawn to
15、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. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the IS
16、O 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 does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions
17、 related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.This document was prepared by Technical Committee ISO/TC 45, Rubber and r
18、ubber products, Subcommittee SC 4, Products (other than hoses).iv ISO 2017 All rights reservedBS ISO 20058:2017ISO 20058:2017(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Internati
19、onal 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 IS
20、O, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Par
21、t 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document 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 th
22、e 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. 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 r
23、eceived (see www .iso .org/ patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformity assessme
24、nt, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (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
25、 4, Products (other than hoses).iv ISO 2017 All rights reserved INTERNATIONAL STANDARD ISO 20058:2017(E)General purpose rubber thread Specification1 ScopeThis document specifies physical and mechanical requirements for rubber threads. It does not apply to rubber threads for food contact, furniture,
26、high heat resistance and high ozone resistance applications.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 reference
27、s, the latest edition of the referenced document (including any amendments) applies.ISO 2321:2017, Rubber threads Methods of test3 Terms and definitionsFor the purpose of this document, the terms and definitions given in ISO 2321 and the following apply.ISO and IEC maintain terminological databases
28、for use in standardization at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obp3.1tension setelongation remaining in a test piece in the relaxed condition after it has been subjected to
29、a constant elongation at a specified time, expressed as a percentage of the elongation4 Rubber thread classificationRubber threads are classified according to cross-sectional shape into three types: Type 1: a round thread; Type 2: a square thread; Type 3: a rectangular thread.The types of rubber thr
30、eads as mentioned above are further sub-divided into three classes depending on the properties: Class 1; Class 2; Class 3. ISO 2017 All rights reserved 1BS ISO 20058:2017ISO 20058:2017(E)5 Requirements5.1 GeneralThe rubber threads shall be uniform in dimension, free from any visual substances and fr
31、ee from other defects that may cause deleterious effects on performance.5.2 Conventional countConventional count (size number) should be agreed between the purchaser and the manufacturer.When tested in accordance with ISO 2321:2017, Clause 5, the tolerance of thread diameter (round thread) or cross-
32、sectional length (square or rectangular thread) shall be less than 3 %, unless otherwise specified.5.3 Metric yield or densityMetric yield when tested according to ISO 2321:2017, Clause 6, shall be within 6 % of the declared value. The specified value for metric yield is dependent on count and densi
33、ty.If density is required by agreement between the purchaser and the manufacturer, it can be tested according to ISO 2321:2017, Clause 8. It shall be as follows:Density 1,20 g/cm3marked as high density.5.4 Physical and mechanical propertiesPhysical and mechanical properties of rubber threads shall c
34、omply with the requirements given in Table 1.The age of test pieces shall not exceed 6 months from the date of manufacture.Table 1 Required physical and mechanical propertiesPhysical and mechanical propertiesRequirementsTest methodClass 1 Class 2 Class 3Modulus at 300 %, N/mm22,0 to 4,0 3,0 to 4,5 4
35、,0 to 5,5 ISO 2321:2017, Clause 9Tensile strength, N/mm2, min. 25 20 15 ISO 2321:2017, Clause 9Elongation at break, %, min. 700 600 500 ISO 2321:2017, Clause 9Tension set, %, max. 8 10 12 ISO 2321:2017, Clause 13After accelerated-ageing test Tensile strength, N/mm2, min. 20 16 12 ISO 2321:2017, Clau
36、se 14Elongation at break, %, min. 560 480 400 ISO 2321:2017, Clause 145.5 Schwartz valueIf the Schwartz value is required, the value given in Annex A should be used.2 ISO 2017 All rights reservedBS ISO 20058:2017ISO 20058:2017(E)5 Requirements5.1 GeneralThe rubber threads shall be uniform in dimensi
37、on, free from any visual substances and free from other defects that may cause deleterious effects on performance.5.2 Conventional countConventional count (size number) should be agreed between the purchaser and the manufacturer.When tested in accordance with ISO 2321:2017, Clause 5, the tolerance o
38、f thread diameter (round thread) or cross-sectional length (square or rectangular thread) shall be less than 3 %, unless otherwise specified.5.3 Metric yield or densityMetric yield when tested according to ISO 2321:2017, Clause 6, shall be within 6 % of the declared value. The specified value for me
39、tric yield is dependent on count and density.If density is required by agreement between the purchaser and the manufacturer, it can be tested according to ISO 2321:2017, Clause 8. It shall be as follows:Density 1,20 g/cm3marked as high density.5.4 Physical and mechanical propertiesPhysical and mecha
40、nical properties of rubber threads shall comply with the requirements given in Table 1.The age of test pieces shall not exceed 6 months from the date of manufacture.Table 1 Required physical and mechanical propertiesPhysical and mechanical propertiesRequirementsTest methodClass 1 Class 2 Class 3Modu
41、lus at 300 %, N/mm22,0 to 4,0 3,0 to 4,5 4,0 to 5,5 ISO 2321:2017, Clause 9Tensile strength, N/mm2, min. 25 20 15 ISO 2321:2017, Clause 9Elongation at break, %, min. 700 600 500 ISO 2321:2017, Clause 9Tension set, %, max. 8 10 12 ISO 2321:2017, Clause 13After accelerated-ageing test Tensile strength
42、, N/mm2, min. 20 16 12 ISO 2321:2017, Clause 14Elongation at break, %, min. 560 480 400 ISO 2321:2017, Clause 145.5 Schwartz valueIf the Schwartz value is required, the value given in Annex A should be used.2 ISO 2017 All rights reserved ISO 20058:2017(E)6 Packaging6.1 PackingThe material shall be p
43、acked to facilitate safe transport and storage.6.2 MarkingThe packages shall be clearly marked with at least by the following items:a) material used;b) conventional count (size number), colour, and the number of threads in ribbon;c) class;d) weight, in kilograms;e) date of manufacture and/or manufac
44、turers identifying lot number. ISO 2017 All rights reserved 3BS ISO 20058:2017ISO 20058:2017(E)Annex A (informative) Schwartz valueA.1 GeneralSchwartz value is the average of the stresses, in megapascals, calculated with respect to the original cross-sectional area at a specified elongation measured
45、 on extension and retraction of a previously massaged (mechanically conditioned) thread.The preferred values of the elongation at which the readings are 300 % and 500 %, depending on the type of thread under test. However, the recommended reading of Schwartz value is at 300 % elongation.A.2 Recommen
46、ded Schwartz valueWhen tested in accordance with ISO 2321:2017, Clause 10, using Schwartz value at 300 % elongation, the Schwartz value shall be 1,3 MPa 25 %.4 ISO 2017 All rights reservedBS ISO 20058:2017This page deliberately left blankBSI is the national body responsible for preparing British Sta
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