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1、BRITISH STANDARD BS EN ISO 283:2007 Textile conveyor belts Full thickness tensile strength, elongation at break and elongation at the reference load Test method The European Standard EN ISO 283:2007 has the status of a British Standard ICS 53.040.20 ? Licensed Copy: London South Bank University, Lon
2、don South Bank University, Mon Jul 16 04:16:43 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN ISO 283:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2007 BSI 2007 ISBN 978 0 580 53766 0 National foreword This British Standard
3、was published by BSI. It is the UK implementation of EN ISO 283:2007. It supersedes BS EN ISO 283-1:2000 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee PRI/67, Conveyor belts. A list of organizations represented on this committee can be obtained on r
4、equest to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComm
5、ents Licensed Copy: London South Bank University, London South Bank University, Mon Jul 16 04:16:43 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 283 June 2007 ICS 53.040.20Supersedes EN ISO 283-1:2000 English Version Textile conveyor belts - Ful
6、l thickness tensile strength, elongation at break and elongation at the reference load - Test method (ISO 283:2007) Courroies transporteuses carcasse textile - Rsistance la traction, allongement la rupture et allongement sous force de rfrence en pleine paisseur - Mthode dessai (ISO 283:2007) Textilf
7、rdergurte - Zugfestigkeit bei voller Gurtdicke, Bruchdehnung und Dehnung bei breitenbezogener Bruchkraft - Prfverfahren (ISO 283:2007) This European Standard was approved by CEN on 23 May 2007. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions f
8、or giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three offic
9、ial versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria,
10、 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, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTE
11、E FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2007 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 283:2007: E Licensed Copy: London So
12、uth Bank University, London South Bank University, Mon Jul 16 04:16:43 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Foreword This document (EN ISO 283:2007) has been prepared by Technical Committee ISO/TC 41 “Pulleys and belts (including veebelts)“ in collaboration with Technical Committee CEN/TC 188
13、“Conveyor belts“, the secretariat of which is held by 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 December 2007, and conflicting national standards shall be withdrawn at the latest by Dec
14、ember 2007. This document supersedes EN ISO 283-1:2000. 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, Fra
15、nce, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 283:2007 has been approved by CEN as EN ISO 283:2007 wit
16、hout any modifications. EN ISO 283:2007 Licensed Copy: London South Bank University, London South Bank University, Mon Jul 16 04:16:43 GMT+00:00 2007, Uncontrolled Copy, (c) BSI Reference number ISO 283:2007(E) INTERNATIONAL STANDARD ISO 283 Third edition 2007-06-15 Textile conveyor belts Full thick
17、ness tensile strength, elongation at break and elongation at the reference load Test method Courroies transporteuses carcasse textile Rsistance la traction, allongement la rupture et allongement sous force de rfrence en pleine paisseur Mthode dessai EN ISO 283:2007 Licensed Copy: London South Bank U
18、niversity, London South Bank University, Mon Jul 16 04:16:43 GMT+00:00 2007, Uncontrolled Copy, (c) BSI ii Licensed Copy: London South Bank University, London South Bank University, Mon Jul 16 04:16:43 GMT+00:00 2007, Uncontrolled Copy, (c) BSI iii Contents Page Foreword iv 1 Scope . 1 2 Normative r
19、eferences. 1 3 Terms and definitions. 1 4 Principle. 2 5 Apparatus 2 6 Test pieces 3 6.1 Shape and dimensions. 3 6.2 Method of selection of test pieces 3 6.3 Preparation of test pieces 7 6.4 Number of test pieces 8 6.5 Conditioning of test pieces 8 7 Procedure 8 8 Calculation and expression of resul
20、ts 8 8.1 Tensile strength 8 8.2 Elongation . 8 9 Test report . 9 Bibliography. 10 EN ISO 283:2007 Licensed Copy: London South Bank University, London South Bank University, Mon Jul 16 04:16:43 GMT+00:00 2007, Uncontrolled Copy, (c) BSI iv Foreword ISO (the International Organization for Standardizat
21、ion) 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 be r
22、epresented 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 Standards
23、 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 Internat
24、ional 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 283 was pr
25、epared by Technical Committee ISO/TC 41, Pulleys and belts (including veebelts), Subcommittee SC 3, Conveyor belts. This third edition of ISO 283 cancels and replaces ISO 283-1:2000, of which it constitutes a technical revision. It also incorporates the Technical Corrigendum ISO 283-1:2000/Cor.1:200
26、6. EN ISO 283:2007 Licensed Copy: London South Bank University, London South Bank University, Mon Jul 16 04:16:43 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 1 Textile conveyor belts Full thickness tensile strength, elongation at break and elongation at the reference load Test method 1 Scope This Int
27、ernational Standard specifies a test method for the determination of the full thickness tensile strength in the longitudinal direction and the elongation at the reference force and breaking point of conveyor belts having a textile carcass. The method can also be used for the determination of full th
28、ickness tensile strength in the transverse direction and the elongation at the breaking point, for use when the manufacturer is requested by the purchaser to state values for these properties. This International Standard is not suitable or valid for light conveyor belts as described in ISO 21183-11.
29、 2 Normative references The following referenced 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 7500-1:1999, Metallic
30、 materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system ISO 18573, Conveyor belts Test atmospheres and conditioning periods EN 10002-2:1991, Metallic materials Tensile testing Part 2: Verifica
31、tion of the force measuring system of the tensile testing machines 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 tensile strength greatest measured force during the tensile test divided by the width of the test piece, expressed in N/mm 3.2
32、nominal tensile strength specified minimum value of the tensile strength, expressed in N/mm EN ISO 283:2007 Licensed Copy: London South Bank University, London South Bank University, Mon Jul 16 04:16:43 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 2 3.3 reference force reference load one-tenth of the
33、nominal tensile strength in the longitudinal direction multiplied by the width of the test piece in mm, expressed in newtons EXAMPLE Nominal tensile strength = 1 600 N/mm One tenth of the nominal tensile strength = 160 N/mm; Reference force for 25 mm test piece = 25 mm 160 N/mm = 4 000 N. 3.4 elonga
34、tion at break elongation at the greatest force load, expressed as the percentage increase in the distance between two reference points 3.5 elongation at the reference force load elongation at the reference force load in the longitudinal direction, expressed as the percentage increase in the distance
35、 between two reference points 4 Principle A test piece, cut from the full thickness of the conveyor belt, is extended under specified conditions using a tensile testing machine, until rupture of the test piece occurs. 5 Apparatus 5.1 Tensile testing machine, of CRE or CRT type, calibrated to Grade 1
36、 according to ISO 7500-1:1999 or EN 10002-2:1991, and capable of extending the test piece at a constant rate, without interruption, of (100 10) mm/min. 5.2 Device, such as an extensometer, with a measuring length of at least 100 mm and accurate to within 0,1 mm or better, capable of measuring the el
37、ongation of the gauge length marked on the test piece. Use of a device that produces a graphical trace throughout the test is preferred. 5.3 Grips, the form of which should prevent any slippage of the test piece during the tensile test. The use of grips with transverse serrations in accordance with
38、Figure 1 is recommended. EN ISO 283:2007 Licensed Copy: London South Bank University, London South Bank University, Mon Jul 16 04:16:43 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 3 Dimensions in millimetres Figure 1 Grip with transverse serrations 5.4 Die cutter or power saw, either of the dies with
39、 wall profiles as shown in Figure 2 being suitable for cutting the test pieces shown in Figures 3, 4 and 5. Other profiles may be used, but the critical feature is that the cut sides of the test piece are perpendicular to the test piece surfaces. NOTE If rubber covers are to be cut, it is advisable
40、to moisten the die and surface to be cut. 6 Test pieces 6.1 Shape and dimensions The shape and dimensions of the test piece shall be in accordance with either Figure 3, 4, 5 or 6. 6.2 Method of selection of test pieces Test pieces shall be selected parallel, or at right angles, to the axis of the be
41、lt, and at not less than 50 mm from the edge of the belt. If test pieces are selected from a sample cut from the belt, no test piece shall be cut with its longitudinal edge less than 12 mm from the edge of the sample. In all cases, the cut or sawn sides of the test piece shall be perpendicular to it
42、s surface. No test piece shall contain a ply joint. For a test piece of type D, draw the form of the test piece on the surface of the belt or sample and from each edge of the sample cut at five places with a power saw up to the drawn lines (see Figure 6). The type D test piece illustrated in Figure
43、6 should be limited to the testing of conveyor belts having tensile strengths greater than 2 000 N/mm. EN ISO 283:2007 Licensed Copy: London South Bank University, London South Bank University, Mon Jul 16 04:16:43 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 4 Dimensions in millimetres a) b) Figure 2
44、Suitable die profiles EN ISO 283:2007 Licensed Copy: London South Bank University, London South Bank University, Mon Jul 16 04:16:43 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 5 Dimensions in millimetres Key L length of both grips 1 reference lines Figure 3 Type A test piece Dimensions in millimetre
45、s Lgende L length of both grips 1 reference lines Figure 4 Type B test piece EN ISO 283:2007 Licensed Copy: London South Bank University, London South Bank University, Mon Jul 16 04:16:43 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 6 Dimensions in millimetres Key L length of both grips 1 reference li
46、nes Figure 5 Type C test piece EN ISO 283:2007 Licensed Copy: London South Bank University, London South Bank University, Mon Jul 16 04:16:43 GMT+00:00 2007, Uncontrolled Copy, (c) BSI 7 Dimensions in millimetres Key L length of both grips 1 reference lines 2 cutting points across the warp Figure 6
47、Type D test piece 6.3 Preparation of test pieces Across the longitudinal axis of the test piece and at right angles to it, draw reference lines 100 mm apart and equidistant from the centre of the test piece (see Figures 3, 4, 5 and 6). Measure the width of the test piece at the centre of the middle
48、section, i.e. between the reference lines, using a vernier gauge capable of reading to at least 0,1 mm. If the covers of the belt are very thick or of very different thicknesses, the test may be performed without covers or with reduced covers, to avoid slippage of the test piece in the grips. For ce
49、rtain types of belt construction, the shapes of the test pieces illustrated in Figures 3, 4, 5 and 6 produce abnormal and unequal stress distributions in the threads of the carcass, causing systematic slip in the grips and giving misleading results. Under such circumstances, the test may be conducted using test pieces of a different shape. EN ISO 283:2007 Licensed Copy: London South Bank University, London South Bank University, M