1、BS EN ISO7590:2009ICS 53.040.20NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDSteel cord conveyorbelts Methods forthe determination oftotal thickness andcover thickness (ISO7590:2009)This British Standard was published under theauthority of the StandardsPolicy
2、and StrategyCommittee on BSI 2009ISBN 978 0 580 57875 5Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 7590:2009National forewordThis British Standard is the UK implementation of EN ISO 7590:2009. Itsupersedes BS EN ISO 7590:2001 which is withdrawn.The UK participation in its pr
3、eparation was entrusted to TechnicalCommittee PRI/67, Conveyor belts.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct applicat
4、ion.Compliance with a British Standard cannot confer immunityfrom legal obligations.28 February2009EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 7590January 2009ICS 53.040.20 Supersedes EN ISO 7590:2001 English VersionSteel cord conveyor belts - Methods for the determination oftotal thicknes
5、s and cover thickness (ISO 7590:2009)Courroies transporteuses cbles dacier - Mthodes dedtermination de lpaisseur totale et de lpaisseur desrevtements (ISO 7590:2009)This European Standard was approved by CEN on 3 January 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations
6、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 Centre or to any CEN member.This European S
7、tandard 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 theofficial versions.CEN members are the national st
8、andards 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, Slovenia, Spain, Sweden, Switzerland and United Ki
9、ngdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 7590:2009: EBS EN I
10、SO 7590:2009EN ISO 7590:2009 (E) 3 Foreword This document (EN ISO 7590:2009) has been prepared by Technical Committee ISO/TC 41 “Pulleys and belts (including veebelts)“ in collaboration with Technical Committee CEN/TC 188 “Conveyor belts” the secretariat of which is held by BSI. This European Standa
11、rd shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2009, and conflicting national standards shall be withdrawn at the latest by July 2009. Attention is drawn to the possibility that some of the elements of this doc
12、ument may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 7590:2001. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are
13、 bound to implement this European Standard: 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, Slovenia, Spain, Swede
14、n, Switzerland and the United Kingdom. Endorsement notice The text of ISO 7590:2009 has been approved by CEN as a EN ISO 7590:2009 without any modification. BS EN ISO 7590:2009ISO 7590:2009(E) ISO 2009 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worl
15、dwide 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 represented on
16、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 are drafted i
17、n 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 International Standard
18、 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 7590 was prepared by Tec
19、hnical Committee ISO/TC 41, Pulleys and belts (including veebelts), Subcommittee SC 3, Conveyor belts. This fifth edition cancels and replaces the fourth edition (ISO 7590:2001), which has been technically revised. BS EN ISO 7590:2009BS EN ISO 7590:2009INTERNATIONAL STANDARD ISO 7590:2009(E) ISO 200
20、9 All rights reserved 1Steel cord conveyor belts Methods for the determination of total thickness and cover thickness 1 Scope This International Standard specifies three methods for the measurement of total belt thickness and the thickness of covers of steel cord conveyor belts. Methods A1 and A2 (m
21、icrometer methods) can be used for all steel cord conveyor belts for the measurement of both total belt thickness and cover thickness. Method B (optical method) is recommended for the measurement of cover thickness only. It is not suitable if there is a textile or metal weft, nor if the ends of the
22、steel cords become twisted when cut. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 breaker reinforcement included in the cover 2.2 weft transverse layer or layers included to reinforce the carcass of the belt and not regarded as part of the
23、 cover layer 3 Principle The total thickness is measured using a micrometer at a number of specified points depending on belt width. The cover thicknesses are measured either a) by removing the covers, taking further measurements at the same specified points and calculating each of the cover thickne
24、sses by subtraction, or b) by direct measurement using an optical measuring instrument. 4 Apparatus 4.1 Dial gauge micrometer for methods A1 and A2 The instrument shall be graduated every 0,1 mm with flat feet and a circular foot of 10 mm in diameter that exerts a pressure of (22 5) kPa on the test
25、specimen. BS EN ISO 7590:2009ISO 7590:2009(E) 2 ISO 2009 All rights reserved4.2 Optical measuring instrument for method B The instrument shall comprises a hand-held magnifying glass with a scale divided in 0,1 mm steps. The magnification shall be at least 8 times. 5 Procedure 5.1 General If the adhe
26、sion strength between cover and core layer is measured in accordance with ISO 8094, the same test pieces may be used for the determination of cover thickness described in method A1. If the position of the steel cord is measured in accordance with EN 13827, the same test piece may be used for the det
27、ermination of cover thickness described in method A2. If the use of methods A1 and A2 is impractical, the visible belt end or the end of a laboratory sample of the belt may be used for the determination of cover thickness described in method B. 5.2 Measurement points If the belt width, B, is less th
28、an or equal to 1 000 mm, measure the thickness at three points spaced equidistantly over the belt width see Figure 1 a). If the belt width, B, is greater than 1 000 mm, measure the thickness at five points spaced equidistantly over the belt width see Figure 1 b). a) Belt width B u 1 000 mm b) Belt w
29、idth B 1 000 mm Figure 1 Location of measurement points 5.3 Test pieces and test specimens 5.3.1 General Cut a rectangular test piece across the full belt width, at 90 to the belt edge, with dimensions as specified in 5.3.2 to 5.3.4, as appropriate. 5.3.2 Test pieces and test specimens for method A1
30、 The test piece shall be approximately 150 mm in length. As appropriate, cut three or five test specimens from the test piece at the measurement points specified in 5.2. Each test specimen shall be two cord pitches wide i.e. of a width equal to the width that comprises two cords (see Figure 2) and s
31、hall have a length of approximately 150 mm. BS EN ISO 7590:2009ISO 7590:2009(E) ISO 2009 All rights reserved 3Dimensions in millimetres Key 1 measurement point 2 test specimen Figure 2 Test specimens taken at the measurement points and cut from a full-width belt sample 5.3.3 Test specimens for metho
32、d A2 The test specimen shall be not less than 50 mm in length with a width equal to the total width of the belt. Mark on the test specimen the measurement points specified in 5.2. 5.3.4 Test specimens for method B The test shall be carried out either on the end of the conveyor belt in situ, or on a
33、test specimen not less than 50 mm in length. In either case, the cut edge shall be at 90 to the surface of the belt and the cords shall be visible and free from contamination, the cord ends being cleaned, if necessary. Mark on the test specimen the measurement points specified in 5.2. 5.4 Measuremen
34、t of thickness 5.4.1 Method A1 5.4.1.1 Measurement of total thickness Measure the total thickness, s1, of the test specimen at each of the measurement points specified in 5.2. 5.4.1.2 Measurement of top cover thickness Remove the top cover down to the two cords (see Figure 3). Measure the dimension
35、s7at the measurement points shown in Figure 1. Take measurements directly above the cord, ensuring that the micrometer foot is in contact with either the surface of the cord see Figure 3 a) or the surface of the weft see Figure 3 b). Calculate the thickness of the top cover, s2, at each measurement
36、point, using Equation (1): 217s ss= (1) BS EN ISO 7590:2009ISO 7590:2009(E) 4 ISO 2009 All rights reserved5.4.1.3 Measurement of bottom cover thickness After carrying out the procedure described in 5.4.1.2, remove the bottom cover. Measure the dimension s8as described in 5.4.1.2, ensuring that the m
37、easurement points are located over the cords. Calculate the thickness of the bottom cover, s3, at each measurement point, using Equation (2): 378s ss= (2) 5.4.1.4 Calculation and expression of results Calculate the arithmetic mean of three or five thicknesses, as appropriate, for s1, s2and s3, as de
38、termined in 5.4.1.1, 5.4.1.2 and 5.4.1.3. Express the results in millimetres. a) Cross-section of a test specimen without weft, with or without breaker b) Cross-section of a test specimen with weft Figure 3 Test specimens for method A1 5.4.2 Method A2 5.4.2.1 Measurement of total thickness Measure t
39、he total thickness, s1, of the test specimen at each of the measurement points specified in 5.2. 5.4.2.2 Measurement of top cover thickness Remove a section of 20 mm in length from the top cover over the entire width of the test specimen (see Figure 4). Measure the thickness, s7, at the same points
40、as in 5.4.2.1. Take measurements directly above the cord, ensuring that the micrometer foot is in contact with either the surface of the cord see Figure 4 a) or the surface of the weft see Figure 4 b). Calculate the thickness of the top cover, s2, at each measurement point, using Equation (1). 5.4.2
41、.3 Measurement of bottom cover thickness After carrying out the procedure described in 5.4.2.2, remove the bottom cover. Measure the dimension s8as described in 5.4.2.2, ensuring that the measurement points are located over the cords. Calculate the thickness of the bottom cover, s3, at each measurem
42、ent point, using Equation (2). BS EN ISO 7590:2009ISO 7590:2009(E) ISO 2009 All rights reserved 5Dimensions in millimetres a) Cross-section of a test specimen without weft, with or without breaker b) Cross-section of a test specimen with weft Key 1 breaker 2 weft 3 cord Figure 4 Test specimens for m
43、ethod A2 5.4.2.4 Calculation and expression of results Calculate the arithmetic mean of three or five thicknesses, as appropriate, for s1, s2and s3, as determined in 5.4.2.1, 5.4.2.2 and 5.4.2.3. Express the results in millimetres. 5.4.3 Method B 5.4.3.1 Measurement of top and bottom cover thickness
44、es Using the optical measuring instrument (see 4.2), measure the distance between the top edge of the cord and the surface of the belt at each of the measurement points specified in 5.2, ensuring that the measuring scale is in physical contact with the belt. Record the thicknesses of the top cover,
45、s2, and bottom cover, s3, at each measurement point. 5.4.3.2 Calculation and expression of results Calculate the arithmetic mean of three or five thicknesses, as appropriate, for s2and s3, as determined in 5.4.3.1. Express the results in millimetres. 6 Test report The test report shall contain at le
46、ast the following information: a) reference to this International Standard (ISO 7590:2008); b) method used, i.e. A1, A2 or B, as appropriate; c) identification of the conveyor belt tested; BS EN ISO 7590:2009ISO 7590:2009(E) 6 ISO 2009 All rights reservedd) number of measurement points; e) test resu
47、lts, as given in 5.4.1.4, 5.4.2.4 or 5.4.3.2, as appropriate; f) date of the test. BS EN ISO 7590:2009ISO 7590:2009(E) ISO 2009 All rights reserved 7Bibliography 1 ISO 8094, Steel cord conveyor belts Adhesion strength test of the cover to the core layer 2 EN 13827, Steel cord conveyor belts Determin
48、ation of the lateral and vertical displacement of steel cords BS EN ISO7590:2009BSI GroupHeadquarters 389Chiswick High Road,London, W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 - British Standards InstitutionBSI is the independent national body responsible for preparing BritishStandards. It
49、presents the UK view on standards in Europe and at theinternational level. It is incorporated by Royal Charter.RevisionsBritish Standards are updated by amendment or revision. Users of BritishStandards should make sure that they possess the latest amendments oreditions.It is the constant aim of BSI to improve the quality of our products and services.We would be grateful if anyone finding an inaccuracy or ambiguity while usingthis British Standard would inform t
