1、January 2010DEUTSCHE NORM English price group 11No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 53.040.20!$V“1565190ww
2、w.din.deDDIN EN ISO 22721Conveyor belts Specification for rubber- or plastics-covered conveyor belts of textileconstruction for underground mining (ISO 22721:2007)English version of DIN EN ISO 22721:2010-01Frdergurte Anforderungen an Textilfrdergurte mit Gummi- oder Kunststoff-Deckplatten frAnwendun
3、gen unter Tage (ISO 22721:2007)Englische Fassung DIN EN ISO 22721:2010-01www.beuth.deDocument comprises 20 pagesDIN EN ISO 22721:2010-01 2 National foreword This document was prepared by Technical Committee ISO/TC 41 “Pulleys and belts (including veebelts)”, Subcommittee SC 3 “Conveyor belts” (Secre
4、tariat: BSI, United Kingdom) and has been adopted as EN ISO 22721:2007 by Technical Committee CEN/TC 188 “Conveyor belts” (Secretariat: BSI, United Kingdom). The responsible German body involved in its preparation was the Normenausschuss Kautschuktechnik (Rubber Technology Standards Committee), Work
5、ing Committee NA 045-02-05 AA Frdergurte. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. DIN shall not be held responsible for identifying any or all such patent rights. The DIN Standards corresponding to the International Standa
6、rds referred to in clause 2 of this document are as follows: ISO 37 DIN 53504 ISO 188 DIN 53508 ISO 252 DIN EN ISO 252 ISO 283 DIN EN ISO 283 ISO 583 DIN EN ISO 583 ISO 703 DIN EN ISO 703 ISO 1120 DIN EN ISO 1120 ISO 4649:2002 DIN ISO 4649:2006 ISO 16851 DIN EN ISO 16851 EN 14973:2006 DIN EN 14973:2
7、006 National Annex NA (informative) Bibliography DIN 53504, Testing of rubber Determination of tensile strength at break, tensile stress at yield, elongation at break and stress values in a tensile test DIN 53508, Testing of rubber Accelerated ageing DIN EN ISO 252, Conveyor belts Adhesion between c
8、onstitutive elements Test methods DIN EN ISO 283, Textile conveyor belts Full thickness tensile strength, elongation at break and elongation at the reference load Test method DIN EN ISO 583, Conveyor belts with a textile carcass Total belt thickness and thickness of constitutive elements Test method
9、s DIN EN ISO 703, Conveyor belts Transverse flexibility (troughability) Test method DIN EN ISO 1120, Conveyor belts Determination of strength of mechanical fastenings Static test method DIN ISO 4649:2006, Rubber, vulcanized or thermoplastic Determination of abrasion resistance using a rotating cylin
10、drical drum device DIN EN ISO 16851, Textile conveyor belts Determination of the net length of an endless (spliced) conveyor belt DIN EN 14973:2006, Conveyor belts for use in underground installations Electrical and flammability safety requirements EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN I
11、SO 22721July 2007ICS 53.040.20; 73.100.40English VersionConveyor belts - Specification for rubber- or plastics-coveredconveyor belts of textile construction for underground mining(ISO 22721:2007)Courroies transporteuses - Spcification pour courroiestransporteuses structure textile recouvertes decaou
12、tchouc ou de plastique, pour utilisation dans les minessouterraines (ISO 22721:2007)Frdergurte - Anforderungen an Textilfrdergurte mitGummi- oder Kunststoff-Deckplatten fr Anwendungenunter Tage (ISO 22721:2007)This European Standard was approved by CEN on 20 June 2007.CEN members are bound to comply
13、 with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management
14、Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theoffici
15、al versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Sloveni
16、a, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN nationa
17、l Members.Ref. No. EN ISO 22721:2007: EContents 2 DIN EN ISO 22721:2010-01 EN ISO 22721:2007 (E) Page Foreword .3 1 Scope4 2 Normative references4 3 Terms and definitions .5 4 Construction 6 5 Length.6 6 Width.7 7 Rubber cover .7 8 Tolerances on total belt thickness and cover thickness.8 9 Transvers
18、e fabric joints in multi-ply belting.9 10 Longitudinal fabric joints9 11 Elongation 10 12 Full thickness tensile strength.10 13 Adhesion 11 14 Troughability11 15 Sampling 11 16 Designation 11 17 Identification 13 Annex A (informative) Items to be agreed between manufacturer and purchaser 14 Annex B
19、(informative) Helpful information to be supplied by the purchaser.15 Annex C (informative) Lateral drift (straight running).17 Bibliography18 Foreword This document (EN ISO 22721:2007) has been prepared by Technical Committee CEN/TC 188 “Conveyor belts“, the secretariat of which is held by BSI, in c
20、ollaboration with Technical Committee ISO/TC 41 “Pulleys and belts (including veebelts)“. 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 January 2008, and conflicting national standards shall be
21、withdrawn at the latest by January 2008. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, G
22、reece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. 3 EN ISO 22721:2007 (E) DIN EN ISO 22721:2010-01 WARNING Users of this International Standard should be aw
23、are that relevant electrical and flammability safety requirements are given in EN 14973, which specifies safety classes for belts intended for use in underground installations. When contracts are entered into for the purchase of belts for use in underground mining, compliance with both this Internat
24、ional Standard and the relevant class in EN 14973 should be specified. Attention is drawn to local regulations for safety which might be in place where the belts are to be used. 1 Scope This International Standard specifies requirements for rubber- or plastics-covered conveyor belting of textile con
25、struction for underground mining on flat or troughed idlers. It is not applicable to light conveyor belts as described in ISO 21183-1. This International Standard does not include requirements for plastics covers. These will need to be agreed upon by the manufacturer and purchaser, taking into accou
26、nt the type of plastics to be used. Related items that are not requirements of this International Standard, but which it is recommended be agreed upon by the manufacturer and purchaser, are included in Annex A. Details recommended to be supplied by the purchaser of belting with an enquiry are given
27、in Annex B. The ability of a belt to run straight cannot be assessed until the belt is installed. Requirements for this are, therefore, outside the scope of this International Standard; nevertheless, recommendations for lateral drift are given in Annex C. 2 Normative references The following referen
28、ced documents are indispensable for the application of 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 37, Rubber, vulcanized or thermoplastic Determination of tensile s
29、tress-strain properties ISO 188, Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance tests ISO 252, Conveyor belts Adhesion between constitutive elements Test methods ISO 282, Conveyor belts Sampling ISO 283, Conveyor belts Full thickness tensile strength, elongation at break
30、and elongation at the reference force Test method 4 DIN EN ISO 22721:2010-01 EN ISO 22721:2007 (E) ISO 583, Conveyor belts with a textile carcass Total belt thickness and thickness of constitutive elements Test methods1)ISO 703, Conveyor belts Transverse flexibility (troughability) Test method ISO 1
31、120, Conveyor belts Determination of strength of mechanical fastenings Static test method ISO 4649:2002, Rubber, vulcanized or thermoplastic Determination of abrasion resistance using a rotating cylindrical drum device ISO 10247, Conveyor belts Characteristics of covers Classification ISO 16851, Tex
32、tile conveyor belts Determination of the net length of an endless (spliced) conveyor belt EN 14973:2006, Conveyor belts for use in underground installations Electrical and flammability safety requirements 3 Terms and definitions For the purposes of this document, the following terms and definitions
33、apply. 3.1 slab belting conveyor belting made in wide widths and long lengths for subsequent slitting and cutting into narrower widths and shorter lengths to suit individual conveyor installations 3.2 solid woven belting conveyor belting consisting of a carcass of more than one ply, the plies being
34、interlocked in the weave or bound together by binding threads in the course of weaving 3.3 mono-ply belting conveyor belting with a carcass consisting of one ply of woven textile fabric 3.4 duo-ply belting conveyor belting with a carcass consisting of two plies of woven textile fabric bonded togethe
35、r by an intermediate layer of elastomer of sufficient thickness to allow the incorporation of a tension element in the joint 3.5 multi-ply belting conveyor belting with a carcass of two or more plies of woven textile fabric, the adjacent plies being bonded together by an intermediate layer of elasto
36、mer 3.6 primary yarn load-carrying yarn which contributes more than 50 % of the full thickness tensile strength 3.7 secondary yarn load-carrying yarn which contributes less than 50 % of the full thickness tensile strength 1) To be published. (Revision of ISO 583-1:1999 and ISO 583:1990) 5 EN ISO 227
37、21:2007 (E) DIN EN ISO 22721:2010-01 4 Construction The carcass shall consist either of one or more plies of woven fabric, or of solid woven fabric, and shall be impregnated or coated with a rubber or plastic. If a breaker consisting of open mesh fabric or cord fabric or cord layer is placed between
38、 the cover and carcass, or is embedded in the cover for the purpose of carcass protection, such a layer shall be considered to be part of the cover thickness and shall not be counted as a fabric ply. If a fabric pile is integrally woven with the carcass on either one or both surfaces of the carcass,
39、 it shall be considered to be part of the carcass thickness. NOTE The external surfaces of the conveyor belt will generally consist of a defined thickness and quality of elastomeric material. 5 Length 5.1 Belting that is ordered to an open-ended length shall be supplied subject to the tolerances in
40、accordance with Table 1. 5.2 The length of belting supplied in the spliced endless form shall be described by the term net endless length. The net endless length shall be supplied subject to the tolerances in accordance with Table 2, when measured in accordance with ISO 16851. It is recommended that
41、, when placing orders for belting, purchasers specify a length of belting that includes such lengths as are required for testing and any additional lengths necessary for vulcanized joints. Table 1 Tolerances on open-end lengths of belting Belt delivery condition Maximum permissible difference betwee
42、n delivered length and ordered length % Slab belting 5 As one length 2,50+In several lengths: for each single length for the sum of all lengths 5 2,50+Table 2 Tolerances on net endless lengths of belting Length of belt Tolerance u 15 m 50 mm 15 m and u 20 m 75 mm 20 m 0,5 % 6 DIN EN ISO 22721:2010-0
43、1 EN ISO 22721:2007 (E) 6 Width The width of the belting and its associated tolerance shall be in accordance with Table 3. Table 3 Widths and tolerances on width of conveyor belting Nominal width of belting mm Tolerance on width 300 400 450 a500 7,5 mm 600 650 750 a800 900 a1 000 1 050 a1 200 1 350
44、a1 400 1 500 a1 600 1 800 2 000 1,5 % aWidth that should only be used for replacement belting in existing installations and not be used as a basis for future new designs. 7 Rubber cover 7.1 If the rubber cover is designated as class H, D or L, it shall conform to the appropriate requirements given i
45、n Table 4, and, after ageing for 168 h at 70 C in accordance with ISO 188, the values obtained for tensile strength and elongation at break shall not vary from the original unaged values by more than 25 % of those values. 7.2 If the thickness of the rubber cover, measured in accordance with ISO 583,
46、 is between 0,8 mm and 1,6 mm, the thickness of the test piece used, in accordance with ISO 37 shall be the maximum obtainable and a tolerance of 15 % shall be permitted on values of tensile strength and elongation at break given in Table 4. 7 EN ISO 22721:2007 (E) DIN EN ISO 22721:2010-01 Table 4 C
47、lassification of conveyor belt rubber covers Cover class Minimum tensile strength of rubber cover N/mm2Minimum elongation at break % Maximum abrasion loss in relative volume mm3H 24 450 120 D 18 400 100 K 20 400 200 L 15 350 200 V 17 350 175 Test method ISO 37 ISO 37 ISO 4649:2002, Method A These va
48、lues will help to determine the appropriate cover compound for the application or for the materials carried. Other values, such as tear resistance, may be considered, if required. Reliable assessment of the behaviour of the covers in service for wear and cut resistance cannot be determined from tens
49、ile strength, elongation and abrasion values alone. The cover grades H, D and L are in accordance with ISO 10247. If other cover materials or qualities are required for a particular application (e.g. safety, oil resistance or heat resistance), the cover properties need to be agreed between the purchaser and the manufacturer. 8 Tolerances on total belt thickness and cover thickness 8.1 Tolerance on total belt thickness If the mean of the 3, 5 or 8 values of total belt
