1、October 2013 Translation by DIN-Sprachendienst.English price group 8No part of this translation 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
2、 13.220.40; 53.040.20!%)?#“2062800www.din.deDDIN EN ISO 340Conveyor belts Laboratory scale flammability characteristics Requirements and test method (ISO 340:2013);English version EN ISO 340:2013,English translation of DIN EN ISO 340:2013-10Frdergurte Brandverhalten unter Laborbedingungen Anforderun
3、gen und Prfung (ISO 340:2013);Englische Fassung EN ISO 340:2013,Englische bersetzung von DIN EN ISO 340:2013-10Courroies transporteuses Caractristiques dinflammabilit dchelle de laboratoire Exigences et mthode dessai (ISO 340:2013);Version anglaise EN ISO 340:2013,Traduction anglaise de DIN EN ISO 3
4、40:2013-10SupersedesDIN EN ISO 340:2007-06 andDIN EN ISO 340 Corrigendum1:2009-09www.beuth.deDocument comprises 12 pagesIn case of doubt, the German-language original shall be considered authoritative.09.13 DIN EN ISO 340:2013-10 2 A comma is used as the decimal marker. National foreword This docume
5、nt (ISO 340:2013) has been prepared by Technical Committee ISO/TC 41 “Pulleys and belts (including veebelts)” (Secretariat: SAC, China), Subcommittee SC 3 “Conveyor belts” (Secretariat: SAC, China and JISC, Japan) and has been taken over as EN ISO 340:2013 by Technical Committee CEN/TC 188 “Conveyor
6、 belts” (Secretariat: SNV, Switzerland). The responsible German body involved in its preparation was the Normenausschuss Kautschuktechnik (Rubber Technology Standards Committee), Working Committee NA 045-02-05 AA Frdergurte. The DIN Standard corresponding to the International Standard referred to in
7、 this document is as follows: ISO 9162 DIN 51622 Amendments This standard differs from DIN EN ISO 340:2007-06 and DIN EN ISO 340 Corrigendum 1:2009-09 as follows: the standard has been editorially revised. Clause 2 “Normative references” has been revised; in Clause 3 “Terms and definitions”, “afterg
8、low” and “glowing” (former 3.2 and 3.5) have been deleted; in Clause 3 “Terms and definitions”, the reference to ISO 13943 has been updated; the Bibliography has been updated. Previous editions DIN 22103: 1959-04, 1968-01, 1975-11, 1989-10 DIN EN 20340: 1993-05 DIN EN ISO 340: 2007-06 DIN EN ISO 340
9、 Corrigendum 1: 2009-09 National Annex NA (informative) Bibliography DIN 51622, Liquefied petroleum gases Propane, propene, butane, butene and their mixtures Requirements NORME EUROPENNE EUROPISCHE NORM EN ISO 340 April 2013 ICS 13.220.40; 53.040.20 Supersedes EN ISO 340:2004English Version Conveyor
10、 belts - Laboratory scale flammability characteristics - Requirements and test method (ISO 340:2013) Courroies transporteuses - Caractristiques dinflammabilit dchelle de laboratoire - Exigences et mthode dessai (ISO 340:2013) This European Standard was approved by CEN on 21 January 2013. CEN members
11、 are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for 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
12、to the CEN-CENELEC Management 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 translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
13、 Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lit
14、huania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Bruss
15、els 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 340:2013: EFrdergurte - Brandverhalten unter Laborbedingungen - Anforderungen undPrfung (ISO 340:2013)Contents PageForeword . 31 Scope . 42 Normative references 43 Terms
16、and definitions . 44 Requirements 44.1 Periods of afterflame (after removal of the burner) . 44.2 Non-reappearance of flame (after applying a current of air) . 55 Test method . 55.1 Health and safety 5. 55.2 Principle 55.3 Test pieces . 55.4 Apparatus 65.5 Location of test 85.6 Conditioning of test
17、pieces . 85.7 Procedure 85.8 Expression of results 86 Test report . 9Bibliography . 102DIN EN ISO 340:2013-10EN ISO 340:2013 (E)Foreword This document (EN ISO 340:2013) has been prepared by Technical Committee ISO/TC 41 “Pulleys and belts (including veebelts)“ in collaboration with Technical Committ
18、ee CEN/TC 188 “Conveyor belts” the secretariat of which is held by SNV. 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 October 2013, and conflicting national standards shall be withdrawn at the l
19、atest by October 2013. Attention is drawn to the possibility that some of the elements of this document 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 340:2004. According to the CEN-
20、CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary
21、, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 340:2013 has been approved by CEN as EN ISO 340:2013 without any modifica
22、tion. 3EN ISO 340:2013 (E)DIN EN ISO 340:2013-10CAUTION This method of test is not designed to assess the fire hazard of any given product. The results may help in the assessment of ignition hazard but should not be used in isolation as evidence that a product or material is safe.1 ScopeThis Interna
23、tional Standard specifies a method for assessing, on a small scale, the reaction of a conveyor belt to an ignition flame source. It is applicable to conveyor belts having a textile carcass as well as steel cord conveyor belts.2 Normative referencesThe following documents, in whole or in part, are no
24、rmatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 8056-1, Aircraft Nickel-chromium and nickel-aluminium th
25、ermocouple extension cables Part 1: Conductors General requirements and testsISO 9162, Petroleum products Fuels (class F) Liquefied petroleum gases SpecificationsISO 18573, Conveyor belts Test atmospheres and conditioning periods3 Terms and definitionsFor the purposes of this document, the following
26、 terms and definitions apply.3.1afterflameflame which persists after the ignition source has been removedSOURCE: ISO 13943:2008, 4.63.2flamezone of combustion in the gaseous phase, usually with emission of lightSOURCE: ISO 13943:2008, 4.1333.3flameto undergo combustion in the gaseous phase with emis
27、sion of lightSOURCE: ISO 13943:2008, 4.1344 Requirements4.1 Periods of afterflame (after removal of the burner)The sum of the periods of flame for each of the series of six tests (see 5.3) shall be less than 45 s and no individual value shall be greater than 15 s (see 5.7.5).4DIN EN ISO 340:2013-10E
28、N ISO 340:2013 (E)4.2 Non-reappearance of flame (after applying a current of air)The flame shall not re-appear (see 5.7.6).5 Test method5.1 Health and safety5.1.1 Smoke and fumesThe ignition and burning of polymeric materials can cause smoke and toxic gases to be released, which can affect the healt
29、h of operators. It is therefore of great importance that suitable means be provided to clear the test area of smoke and fumes.5.1.2 Handling, storage and disposal of liquefied petroleum gas containersAll the relevant local safety regulations shall be taken into account for the handling and storage o
30、f liquefied petroleum gas (LPG) and for the disposal of used LPG containers.If local safety regulations require the LPG cylinders to be stored in an environment that is cooler than the test area or some distance from the test rig, a sufficient length of tubing is needed inside the controlled environ
31、ment to ensure that the gas equilibrates to the required temperature before flow measurement. One way to facilitate this is to pass the gas (before flow measurement) through a metal tube immersed in water maintained at 25 C.5.2 PrincipleA test piece cut from a conveyor belt is suspended vertically a
32、bove a gas flame for a specified time, after which the gas flame is removed. The afterflame time is measured. Any re-flame is noted when the test piece is later subjected to a current of air.5.3 Test pieces5.3.1 GeneralThe test pieces described in 5.3.2 and 5.3.3 shall be taken at a minimum distance
33、 of 50 mm from the edges of the belt.5.3.2 Conveyor belting with a textile carcass5.3.2.1 For tests on conveyor belts with and without covers5.3.2.1.1 Prepare 12 test pieces, each (200 mm 5 mm) (25 mm 1 mm) as follows:a) three test pieces, with covers intact, in the longitudinal direction of the con
34、veyor belt;b) three test pieces, with covers intact, in the transverse direction of the conveyor belt;c) three test pieces, with covers removed (see 5.3.2.1.2), in the longitudinal direction of the conveyor belt;d) three test pieces, with covers removed (see 5.3.2.1.2), in the transverse direction o
35、f the conveyor belt.5.3.2.1.2 Covers may be removed see 5.3.2.1.1 c) and d) by stripping, cutting or buffing. If covers are removed by buffing, care should be exercised to ensure that the test piece is not overheated or that any threads of a textile carcass are not damaged.5EN ISO 340:2013 (E)DIN EN
36、 ISO 340:2013-105.3.2.2 For tests on conveyor belts with covers intactIf the product specification requires the test to be conducted on conveyor belts with the covers intact, conduct only six tests on test pieces as described in 5.3.2.1.1 a) and b).5.3.2.3 For tests on conveyor belts designed for us
37、e without coversIf the product specification requires the test to be conducted on conveyor belts which are by design intended to be used without covers, conduct only six tests on test pieces as described in 5.3.2.1.1 c) and d).5.3.3 Steel cord conveyor belts5.3.3.1 For tests on conveyor belts with c
38、overs intactIf the product specification requires the test to be conducted on conveyor belts with the covers intact, cut six test pieces in the longitudinal direction of the belt, each 200 mm 5 mm long, as close as possible to 25 mm wide depending on the cord diameter and pitch. Each test piece shal
39、l be at least 20 mm wide and contain at least two cords, with the cut edges representing the centreline between adjacent cords.5.3.3.2 For tests on conveyor belts with covers removedIf the product specification requires the test to be conducted on conveyor belts without covers, cut six test pieces a
40、s described in 5.3.3.1 and remove the covers, e.g. by stripping, cutting or buffing.5.4 Apparatus5.4.1 Gas burner (Bunsen type), having a burner tube with an inside diameter of 10 0,5 mm, as illustrated in Figure 1.5.4.2 Commercial propane gas, as specified in ISO 9162.6DIN EN ISO 340:2013-10EN ISO
41、340:2013 (E)Dimensions in millimetresKey1 thermocouple (see 5.4.6)a Direction of air current to be applied after removal of burner.Figure 1 Illustration of gas burner and test piece configuration during test5.4.3 Timing devices, capable of being read to 0,2 s or less.5.4.4 Measuring devices, graduat
42、ed in millimetres or submultiples of millimetres and calibrated to an appropriate accuracy.5.4.5 Test piece holder and location clips, consisting of a rectangular frame not less than 500 mm high, having two sides spaced 75 mm apart on which are fitted suitable clips for mounting the test piece in a
43、vertical plane at least 20 mm from the frame. The frame is fitted onto a suitable support to maintain the sides in a vertical orientation during the test.As some products of combustion are corrosive, the test apparatus should be constructed of material that will not be adversely affected.5.4.6 Calib
44、rated NiCr/NiAl thermocouple, as specified in ISO 8056-1 or its equivalent.5.4.7 Means of applying a current of air, having a normal oxygen content and a relative humidity no greater than 80 % at a temperature not exceeding 30 C at a velocity of 1,5m/s.7EN ISO 340:2013 (E)DIN EN ISO 340:2013-105.5 L
45、ocation of testA location in which the air movement is less than 0,2 m/s at the commencement of the test and is not further influenced by mechanical devices operating during the test is required. The volume of air surrounding the test location shall be such that the test is not affected by any reduc
46、tion of oxygen concentration. If an open-fronted cabinet is used for the test, provision shall be made to permit the test piece to be mounted at least 300 mm from any wall.5.6 Conditioning of test piecesAfter preparation of the test pieces as described in 5.3, ensure that they are in equilibrium wit
47、h one of the standard atmospheres for conditioning and testing specified in ISO 18573.5.7 Procedure5.7.1 Carry out the test in an atmosphere having a temperature between 10 C and 30 C and a relative humidity between 15 % and 80 %, preferably at the same temperature and relative humidity used for con
48、ditioning or in the atmosphere applicable at the site of use, if known.5.7.2 Place the test piece in the clips of the test rig (5.4.5), ensuring that the test piece is in the vertical position.5.7.3 Light the burner and preheat it for 2 min. Adjust the gas flow to give a total flame height of betwee
49、n 150 mm to 180 mm, with an inner flame length of approximately 50 mm.Position the thermocouple (5.4.6) in the hottest part of the flame (i.e. just above the inner flame cone as shown in Figure 1) and check that the temperature is 1 000 C 20 C.If necessary, adjust the burner flame so that the temperature recorded is 1 000 C 20 C.5.7.4 Position the burner at 45(see Figure 1), immediately under the central vertical axis in the planar centreline of the test piece with the top of the burner tube 5
