1、BSI Standards PublicationBS EN 12881-1:2014Conveyor belts Fire simulation flammability testingPart 1: Propane burner testsBS EN 12881-1:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 12881-1:2014. It supersedes BS EN 12881-1:2005+A1:2008 which is withdrawn
2、.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. Users are re
3、sponsible for its correct application. The British Standards Institution 2014. Published by BSI Standards Limited 2014ISBN 978 0 580 78067 7 ICS 13.220.40; 53.040.20 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authori
4、ty of the Standards Policy and Strategy Committee on 31 May 2014.Amendments issued since publicationDate Text affectedBS EN 12881-1:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORMEN 12881-1 May 2014 ICS 13.220.40; 53.040.20 Supersedes EN 12881-1:2005+A1:2008English Version Conveyor belts - Fir
5、e simulation flammability testing - Part 1: Propane burner tests Courroies transporteuses - Essais de simulation dinflammation - Partie 1: Essais avec brleur propane Frdergurte - Brandtechnische Prfungen - Teil 1: Prfungen mit dem Propanbrenner This European Standard was approved by CEN on 15 Februa
6、ry 2014. CEN members are bound to comply 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 national standards may be obtai
7、ned on application 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
8、-CENELEC Management 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,
9、Italy, Latvia, Lithuania, 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 CEN-CENELEC Management Centre:
10、Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12881-1:2014 EBS EN 12881-1:2014EN 12881-1:2014 (E)2 Contents PageForeword3 Introduction .4 1 Scope 5 2 Normative references 5 3 Propane gas sup
11、ply.5 4 Method A Two metre single burner test .6 4.1 Apparatus .6 4.2 Preparation of test pieces.9 4.3 Temperature at commencement of test 9 4.4 Number of tests9 4.5 Procedure .9 4.6 Termination of tests 10 4.7 Measurement of damage to test pieces . 10 4.8 Test report . 11 5 Method B Double burner t
12、est . 12 5.1 Apparatus 12 5.2 Preparation of test pieces 13 5.3 Temperature at commencement of test . 13 5.4 Number of tests. 13 5.5 Procedure 14 5.6 Termination of tests 14 5.7 Measurement of damage to test pieces . 14 5.8 Test report . 15 6 Method C Mid-scale fire propagation test . 15 6.1 Apparat
13、us 15 6.2 Preparation of test pieces 23 6.3 Installation of the test pieces and burner 23 6.4 Temperature at commencement of test . 23 6.5 Number of tests. 23 6.6 Procedure 23 6.7 Termination of tests 24 6.8 Measurement of damage to test pieces . 24 6.9 Exhaust temperature calibration. 25 6.10 Test
14、report . 25 7 Method D Laboratory scale Fire Propagation Test . 26 7.1 Apparatus 26 7.2 Preparation of test pieces 27 7.3 Installation of the test piece and burner 27 7.4 Test Conditions. 27 7.5 Procedure 27 7.6 Termination of tests 28 7.7 Measurement of damage to test pieces . 28 7.8 Test report .
15、28 Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2006/42/EC . 33 Bibliography . 34 BS EN 12881-1:2014EN 12881-1:2014 (E)3 ForewordThis document (EN 12881-1:2014) has been prepared by Technical Committee CEN/TC 188 “Conveyor belts”,
16、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 November 2014 and conflicting national standards shall be withdrawn at the latest by November 2014.Attention
17、 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 12881-1:2005+A1:2008. This document has been prepared under a mandat
18、e given to CEN by the European Commission and theEuropean Free Trade Association, and supports essential requirements of EU Directive(s).For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document.The main changes with respect to the previous edition a
19、re listed below: Laboratory scale fire propagation test was added (Method D); Mid-scale fire propagation test (Method C, 6.1.1 Test gallery) thermal conductivity of the refractory material was included; Mid-scale fire propagation test (Method C, 6.1.4 Gas burner) the diameter of the bore jets used w
20、as added.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, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, Fr
21、ance, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.BS EN 12881-1:2014EN 12881-1:2014 (E)4 IntroductionThis European Standard is a
22、type B1 standard as stated in EN ISO 12100. The provisions of this European Standard may be supplemented or modified by a type C standard.The machinery concerned and the extent to which hazards, hazardous situations and events are covered are indicated in the scope of this European Standard.NOTE For
23、 machines which are covered by the scope of a type C standard and which have been designed and built according to the provisions of that standard, the provisions of that type C standard take precedence over the provisions of this type B1 standard.The methods of test described in EN 12881-1 are inten
24、ded to provide an indication of the reaction of a conveyor belt to a fire situation. However, in doing so 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
25、 of test but consideration has also to be given to the individual site location.WARNING The tests described in EN 12881-1 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 terminate
26、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.BS EN 12881-1:2014EN 12881-1:2014 (E)5 1 ScopeEN 12881-1 describes four methods for measuring the propagation of a flame along a conveyor bel
27、t which has been exposed to a relatively high localized heat source such as a fire. The damage suffered by the conveyor belt, as well as its tendency to support combustion, is measured by observing the extent to which the fire spreads along the test piece.Method A uses a test piece 2 m in length and
28、 consumes propane gas through the burner at the rate of (1,30 0,05) kg per 10 min.Method B uses a test piece 2,5 m in length and consumes propane gas through two burners mounted above and below the test piece trestle at the rate of (1,30 0,05) kg per 10 min for each burner.Method C uses a test piece
29、 1,5 m in length and consumes propane gas through the burner at the rate of (565 10) g per 50 min.Method D uses a test piece 1,2 m in length and consumes propane gas through the burner at the rate of 150 l/hr (D1) or 190 l/hr (D2).2 Normative referencesThe following documents, in whole or in part, a
30、re normatively 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.EN 10088-3, Stainless steels Part 3: Technical delivery
31、 conditions for semi-finished products, bars, rods, wire, sections and bright products of corrosion resisting steels for general purposesEN 22768-1, General tolerances Part 1: Tolerances for linear and angular dimensions without individual tolerance indications (ISO 2768-1)ISO 65, Carbon steel tubes
32、 suitable for screwing in accordance with ISO 7-1ISO 9162, Petroleum products Fuels (class F) Liquefied petroleum gases Specifications3 Propane gas supplyThe burners used in each method shall be supplied from bottled propane gas complying with ISO 9162 which shall be fed to each burner, using high p
33、ressure propane hose having a minimum internal diameter of 6,3 mm, either:a) through a pressure reducing valve, a non-return valve and an orifice plate 1,7 mm thick with a 2,5 mmdiameter hole; orb) through a pressure reducing valve and a non-return valve followed by a flow meter calibrated to ensure
34、 that the correct mass of gas is consumed.Before and during the test, immerse each gas cylinder to approximately two-thirds of its height in a bath of water at a temperature of (25 3) C. Ensure that each gas cylinder is not emptied at the end of a test by more than 90 % of its gas mass capacity.BS E
35、N 12881-1:2014EN 12881-1:2014 (E)6 4 Method A Two metre single burner test4.1 Apparatus4.1.1 Gallery (see Figure 1) having a cross section not greater than 6 m2, a height of not less than 1,9 mand not greater than 2,25 m and a width of not less than 1,9 m and not greater than 2,75 m through which ai
36、r is drawn by an adjustable fan. The gallery shall have a concrete floor and shall be not less than 15,0 m long measured from the gallery entrance.4.1.2 Trestle (see Figure 2) comprising a framework having internal dimensions 2,25 m long x 1,25 m wide and constructed of steel tubing complying with I
37、SO 65, having a bore designation of DN 15 heavy series. The upper sides of the trestle frame shall be fitted with rod retainers to position and retain 15 steel bars manufactured from an austenitic chrome/nickel steel of an appropriate quality, such as 1.4310X10CrNi18-8 complying with EN 10088-3, res
38、istant to rust, acid and heat. The bars shall be 10 mm diameter x 1,4 m in length and form the frame on which the belting rests. The upper surface of the bars shall be 350 mm from the floor.4.1.3 Burner, constructed in accordance with Figure 3, comprising a square having side dimensions of (450 9) m
39、m and an overall height of (220 5) mm. The burner shall be made of welded steel tube complying with ISO 65, having a bore designation of DN 15 medium or heavy series. The tubing shall have 52 holes, each having a diameter of (1,5 0,1) mm, spaced at 50 mm intervals.4.1.4 Anemometer, or other means of
40、 measuring the air velocity in the gallery, which shall be located at a height of 350 mm on the centreline of the gallery, at least 7,25 m inside the gallery entrance and 750 mm from the end of the trestle nearest the gallery entrance.It is important that the air flow in the gallery is laminar and t
41、o this end equipment to assist in producing laminar flow may be used.4.1.5 Thermocouple, to measure the temperature of the incoming air, located as shown in Figure 1. BS EN 12881-1:2014EN 12881-1:2014 (E)7Dimensions in millimetresa) Plan view of galleryb) Cross-section of front of galleryKey1 rear o
42、f gallery2 position of thermocouple on centre line3 front of galleryFigure 1 Location of thermocouple for measuring the temperature of incoming airGeneral manufacturing tolerances shall be according to EN 22768-1, unless otherwise stated.BS EN 12881-1:2014EN 12881-1:2014 (E)8Dimensions in millimetre
43、sKey1 direction of air flow 8 gallery entrance2 additional bar 9 test piece3 to be clear of any cross bracing 10 edge of test piece flush with front of trestle4 propane burner 11 350 mm to flow line5 DN 15 heavy series tube 12 rod retainers6 detail of trestle 13 DN 15 heavy series trestle7 bars made
44、 of austenitic chrome/nickel steel, 14 detail of rod retaining anglediameter 10 mm, length 1,4 m Figure 2 Propane burner trestle showing positions of burner and test pieceBS EN 12881-1:2014EN 12881-1:2014 (E)9Dimensions in millimetresa) Elevationb) Plan viewKey1 threaded2 hole (x 52)Figure 3 Burner
45、for Method A4.2 Preparation of test piecesCut two test pieces, each 2 m long 1 200 mm wide or of full width if the conveyor belt is less than 1 200 mm wide. Lay the test pieces out for 24 h in dry conditions at any ambient temperature above 0 C immediately prior to testing to remove residual curvatu
46、re.4.3 Temperature at commencement of testThe ambient temperature at the commencement of the test shall be between 5 C and 30 C.4.4 Number of testsCarry out two tests, one on each side of the belt, so that both covers are tested.4.5 Procedure4.5.1 Weigh the propane gas bottle prior to the test.BS EN
47、 12881-1:2014EN 12881-1:2014 (E)104.5.2 Install the trestle (4.1.2) centrally on the longitudinal axis of the gallery (4.1.1) with the burner end facing the direction of the ventilation flow. The burner end of the trestle shall be at least 8 m from the gallery entrance.4.5.3 Place each test piece in
48、 turn centrally on the trestle with its transverse edge flush with the burner end of the trestle.4.5.4 Adjust the air current in the gallery to give an average velocity of (1,5 0,1) m/s at a height of 350 mm. Take the measurement on the centreline of the trestle and at a distance of 750 mm from the
49、end of the trestle nearest the gallery entrance (see Figure 1).4.5.5 Place the burner centrally with the four parallel burner tubes in line with the longitudinal axis of the test piece, and position it so that the distance from the top of the burner to the top of the bars on which the belt rests is (130 5) mm, with the transverse end row of burner holes 50 mm inside the vertically projected transverse edge of the test piece. Light the burner and adjust the rate of gas consumption immediately to (1,30 0,05) kg per
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