1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 251:2012Conveyor belts with textilecarcass Widths and lengthsBS ISO 251:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 251:201
2、2. Itsupersedes BS ISO 251:2003 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/67, Conveyor belts.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the
3、necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 77351 8ICS 53.040.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard
4、was published under the authority of theStandards Policy and Strategy Committee on 31 October 2012.Amendments issued since publicationDate Text affectedBS ISO 251:2012 ISO 2012Conveyor belts with textile carcass Widths and lengthsCourroies transporteuses carcasse textile Largeurs et longueursINTERNA
5、TIONAL STANDARDISO251Fourth edition2012-10-01Reference numberISO 251:2012(E)BS ISO 251:2012ISO 251:2012(E)ii ISO 2012 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2012All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by a
6、ny means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the 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 copy
7、rightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 251:2012ISO 251:2012(E) ISO 2012 All rights reserved iiiContents PageForeword iv1 Scope 12 Widths and tolerances . 13 Tolerances on lengths 1Bibliography . 3BS ISO 251:2012ISO 251:2012(E)ForewordISO (the International Organization for Standar
8、dization) 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
9、 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 Stand
10、ards 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 Inter
11、national 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 251 was p
12、repared by Technical Committee ISO/TC 41, Pulleys and belts (including veebelts), Subcommittee SC 3, Conveyor belts.This fourth edition cancels and replaces the third edition (ISO 251:2003), of which it constitutes a minor revision.iv ISO 2012 All rights reservedBS ISO 251:2012INTERNATIONAL STANDARD
13、 ISO 251:2012(E)Conveyor belts with textile carcass Widths and lengths1 ScopeThis International Standard specifies the widths and lengths of conveyor belts with a textile carcass. It also specifies the corresponding tolerances.It is not applicable to light conveyor belts as described in ISO 21183-11
14、, as tolerances on the widths and lengths of cut light conveyor belts are given in ISO 151472.NOTE The lengths of conveyor belts are not standardized.2 Widths and tolerancesThe widths of conveyor belts and permissible tolerances shall be as given in Table 1.Table 1 Nominal widths and tolerances of o
15、pen-ended conveyor beltsDimensions in millimetresNominal width Tolerance300 5400 5500 5600 6650 6,5800 81 000 101 200 121 400 141 600 161 800 182 000 202 200 222 400 242 600 262 800 283 000 303 200 323 Tolerances on lengthsThe permissible tolerances for the lengths of conveyor belts, measured loose,
16、 shall be as given in Tables 2 and 3. ISO 2012 All rights reserved 1BS ISO 251:2012ISO 251:2012(E)Table 2 Tolerances on length for endless conveyor beltsLengthmTolerancemm 15 50 15 but 20 75 20 0,5 % of the length in metresTable 3 Tolerances on length for open-ended conveyor beltsBelt delivery condi
17、tionTolerance(maximum permissible difference between delivered length and ordered length)As one length025+ ,%In several lengths for each single length or as one length 5 % for the sum of all lengths 025+ ,%2 ISO 2012 All rights reservedBS ISO 251:2012ISO 251:2012(E)Bibliography1 ISO 21183-1, Light c
18、onveyor belts Part 1: Principal characteristics and applications2 ISO 15147, Light conveyor belts Tolerances on widths and lengths of cut light conveyor belts ISO 2012 All rights reserved 3BS ISO 251:2012ISO 251:2012(E) ISO 2012 All rights reservedICS 53.040.20Price based on 3 pagesThis page deliber
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