1、BRITISH STANDARDBS EN 12881-2:2005 +A1:2008Conveyor belts Fire simulation flammability testing Part 2: Large scale fire testICS 13.220.40; 53.040.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39
2、g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 12881-2:2005+A1:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 22 February 2006 BSI 2008ISBN 978 0 580 60680 9National forewordThis British Standard is the UK implementation of EN 128
3、81-2:2005+A1:2008. It supersedes BS EN 12881-2:2005 which is withdrawn. The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indica
4、ted by !“.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 request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Us
5、ers are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDate Comments31 July 2008 Implementation of CEN amendment A1:2008EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12881-
6、2:2005+A1 April 2008 ICS 13.220.40; 53.040.20 Supersedes EN 12881-2:2005 English Version Conveyor belts - Fire simulation flammability testing - Part 2: Large scale fire test Courroies transporteuses - Essais de simulation dinflammation - Partie 2: Essai au feu grande chelle Frdergurte - Brandtechni
7、sche Prfungen - Teil 2: Brandstreckenprfung This European Standard was approved by CEN on 21 March 2005 and includes Amendment 1 approved by CEN on 21 February 2008. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Stan
8、dard 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 official versions (English, Frenc
9、h, 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, Belgium, Bulgaria, Cyprus,
10、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 COMMITTEE FOR STANDARDIZATION COMIT
11、EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12881-2:2005+A1:2008: EEN 12881-2:2005+A1:2008 (E) 2 Contents page
12、Foreword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Apparatus .5 4 Preparation .5 4.1 Test piece .5 4.2 Temperature before the test .5 4.3 Number of tests5 5 Procedure .6 6 Interpretation of results 6 7 Test report 6 Annex ZA (informative) Relationship between this European Standard and t
13、he Essential Requirements of EU Directive 98/37/EC 9 Annex ZB (informative) !Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC“.10 BS EN 12881-2:2005+A1:2008EN 12881-2:2005+A1:2008 (E) 3 Foreword This document (EN 12881-2:2005+A1:2008) has been pre
14、pared by Technical Committee CEN/TC 188 “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 October 2008, and conflicting national standards
15、shall be withdrawn at the latest by October 2008. This document supersedes EN 12881-2:2005. This document includes Amendment 1, approved by CEN on 2008-02-21. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. This European Standard has been prepared
16、 under a mandate given to CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). !For relationship with EU Directives, see informative Annexes ZA and ZB, which are integral parts of this document.“ The other part of EN 12281 is
17、: !EN 12881-1+A1:2008“, Conveyor belts Fire simulation flammability testing Part 1: Propane burner tests 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, Cypru
18、s, 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 the United Kingdom. BS EN 12881-2:2005+A1:2008EN 12881-2:2
19、005+A1:2008 (E) 4 Introduction The method of test described in this part of EN 12881 is intended to provide an indication of the reaction of a conveyor belt when exposed to a large fire. The fire being simulated is one not caused by a local heat source but by materials around the conveyor belt which
20、 catch fire following exposure to other heat sources. Attention is drawn to the fact that in assessing the overall flammability characteristics of conveyor belting for specific installations, it is not sufficient to rely solely on any single method of test but consideration should also to be given t
21、o the individual site location. BS EN 12881-2:2005+A1:2008EN 12881-2:2005+A1:2008 (E) 5 1 Scope This part of EN 12881 describes a method of test for the assessment of fire propagation along a conveyor belt when the belt is exposed to a heat source. 2 Normative references The following referenced doc
22、uments are indispensable for the application of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 60584-1, Thermocouples - Part 1: Reference tables (IEC 60584-1:19
23、95) ISO 3130, Wood Determination of moisture content for physical and mechanical tests 3 Apparatus 3.1 Fire gallery lined with fire clay bricks having a cross sectional area of 8 m2and a length of at least 70 m . The fuel in the fire object area shall be supported by four steel arches 1 m apart (see
24、 Figures 1a) and 1b). 3.2 Trestle for positioning the conveyor belt in the fire gallery during the test. The trestle shall be 18 m long and 1,2 m wide having idlers with a pitch of 1,5 m and a troughing angle of 30. 3.3 Fire object comprising a) 260 kg of air-dried coniferous wood in the form of rou
25、nd timber, having a diameter of 8 cm to 12 cm and a length of 1,25 m, cut in the longitudinal direction and having moisture content of (10 2) % measured as described in ISO 3130; and b) 40 kg of smaller wood pieces and wood shavings for ignition (see Figures 1a) and 1b). 3.4 Anemometer for measuring
26、 the air speed in the fire gallery positioned 10 m in front of the test piece in the direction of the air flow. 3.5 Row of thermocouples, Type K (Ni-Cr/Ni) according to EN 60584-1, positioned in the longitudinal direction above the test piece, a distance of approximately 3 m from each other and 100
27、mm under the roof of the fire gallery (see Figures 1a) and 1b). 4 Preparation 4.1 Test piece The test piece shall be cut 18 m long at full belt width. 4.2 Temperature before the test The ambient temperature shall be between 5 C and 30 C before the test. 4.3 Number of tests One test shall be carried
28、out. BS EN 12881-2:2005+A1:2008EN 12881-2:2005+A1:2008 (E) 6 5 Procedure WARNING The tests described in this part of EN 12881 can generate large amounts of smoke and heat. It is therefore essential to conduct the tests with caution, having due regard to health and safety considerations and to termin
29、ate any test immediately if at any time it is considered advisable to do so. In this regard it is recommended that no test should be supervised by only one person. Install the trestle (3.2) centrally along the longitudinal axis of the fire gallery (3.1) at a distance of 25 m from the beginning of th
30、e gallery in the direction of the air flow (see Figure 1a). Place the half round timber between the gallery wall and the steel arch supports equally distributed over the three spaces. In the first two spaces place the 40 kg of wood for ignition on the ground near the wall. Lay the test piece central
31、ly in the longitudinal direction on the trestle with the bottom cover down such that a 13 m length of the test piece is behind the fire object (3.3) in the direction of the air flow (see Figure 1a). Fix both ends of the test piece in this position, ensuring that the distance from the lowest point of
32、 the test piece to the roof of the gallery is 1,5 m (see Figure 1a). Position the thermocouples (3.5) in accordance with Figures 1a) and 1b). Before starting the test, adjust the air flow on the fresh air side to 1,2 m/s. Set the wood on both sides of the gallery on fire and observe the extent of th
33、e fire. Measure and record continuously the temperature at the test piece and under the roof, the composition of the gas and the speed of the air flow. 6 Interpretation of results At the end of the test measure the fire propagation at the test piece from the end of the fire object in the direction o
34、f the air flow. The test piece shall have passed the test if the fire has not propagated more than 10 m behind the fire object (see Figure 1a). 7 Test report The test report shall include the following particulars: a) reference to this European Standard, i.e. !EN 12881-2:2005+A1:2008“; b) name of in
35、stitution carrying out the test; c) name of belt manufacturer; d) description of the conveyor belt, taken from the product standard or specification; e) distance that the fire has propagated (see Clause 6); f) date of the test; g) signature and name of person responsible for the test; h) any deviati
36、on from this standard; i) the following statement: “The test results relate only to the behaviour of the test pieces of a product under the particular conditions of test; they are not intended to be the sole criterion for assessing the potential fire hazard of the product in use“. BS EN 12881-2:2005
37、+A1:2008EN 12881-2:2005+A1:2008 (E) 7 Dimensions in metres Tolerances 0,05 m a) Position of the test piece and fire object BS EN 12881-2:2005+A1:2008EN 12881-2:2005+A1:2008 (E) 8 b) Fire gallery cross section Key1 Conveyor belt/test piece 2 Timber lining 3 Steel arch support 4 Suspension 5 Trestle 6
38、 Small wood, wood shavings 7 Fire clay bricks 8 Fire object 9 Window 10 Fire gallery 11 Limit for fire propagation T Thermocouple Type K (Ni-Cr/Ni) according to EN 60584-1 Figure 1 Test arrangement BS EN 12881-2:2005+A1:2008EN 12881-2:2005+A1:2008 (E) 9 Annex ZA (informative) Relationship between th
39、is European Standard and the Essential Requirements of EU Directive 98/37/EC This European Standard has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association to provide one means of conforming to Essential Requirements of the New Approach Direc
40、tive for machinery, 98/37/EC, amended by Directive 98/79/EC. Once this standard is cited in the Official Journal of the European Communities under that Directive and has been implemented as a national standard in at least one Member State, compliance with the normative clauses of this standard confe
41、rs, within the limits of the scope of this standard, a presumption of conformity with the corresponding Essential Requirement 1.5.6 Fire of that Directive and associated EFTA regulations. WARNING Other requirements and other EU Directives may be applicable to the product(s) falling within the scope
42、of this standard. BS EN 12881-2:2005+A1:2008EN 12881-2:2005+A1:2008 (E) 10 Annex ZB (informative) !Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC This European Standard has been prepared under a mandate given to CEN by the European Commission an
43、d the European Free Trade Association to provide one means of conforming to Essential Requirements of the New Approach Directive for machinery, 2006/42/EC. Once this standard is cited in the Official Journal of the European Communities under that Directive and has been implemented as a national stan
44、dard in at least one Member State, compliance with the normative clauses of this standard confers, within the limits of the scope of this standard, a presumption of conformity with Essential Requirements 1.5.6 Fire of that Directive and associated EFTA regulations. WARNING Other requirements and oth
45、er EU Directives may be applicable to the product(s) falling within the scope of this standard.“ BS EN 12881-2:2005+A1:2008blankBS EN 12881-2:2005 +A1:2008BSI Group Headquarters389 Chiswick High Road,London W4 4AL, UKTel +44 (0)20 8996 9001Fax +44 (0)20 8996 Standards Institution (BSI)BSI is the in
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