1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Part 4: Determination of burning rate under ambient conditionsThe European Standard EN 13938-4:2003
2、 has the status of a British StandardICS 71.100.30Explosives for civil uses Propellants and rocket propellants BRITISH STANDARDBS EN 13938-4:2003BS EN 13938-4:2003This British Standard, was published under the authority of the Standards Policy and Strategy Committee on 22 December 2003 BSI 22 Decemb
3、er 2003ISBN 0 580 43132 0Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI
4、 Electronic Catalogue or of British Standards Online.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 does not of itself confer immunity from legal obligations.Summary of page
5、sThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsA list of org
6、anizations represented on this committee can be obtained on request to its secretary.enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK.National forewordThis British Stand
7、ard is the official English language version of EN 13938-4:2003.The UK participation in its preparation was entrusted to Technical Committee CII/61, Explosives for civil uses, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European com
8、mittee any EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 13938-4December 2003ICS 71.100.30English versionExplosives for civil uses - Propellants and rocket propellants -Part 4: Determination of burning rate under ambient conditionsExplosifs usage civil - Poudres propulsives et propergolspour fus
9、es - Partie 4: Dtermination de la vitesse decombustion dans les conditions ambiantesExplosivstoffe fr zivile Zwecke - Treibladungspulver undRaketentreibstoffe - Teil 4: Bestimmung derBrenngeschwindigkeit bei UmgebungsbedingungenThis European Standard was approved by CEN on 1 October 2003.CEN members
10、 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 nationalstandards may be obtained on application to
11、 the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status
12、as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COM
13、MITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2003 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13938-4:2003 EEN 13938-4:2003 (E)2Conte
14、nts pageForeword31 Scope 32 Normative references 33 Terms and definitions44 Principle45 Apparatus .46 Preparation of test sample57 Procedure .58 Expression of results 69 Test report 6Annex A (informative) Range of applicability of the test method.7Annex ZA (informative) Clauses of this European Stan
15、dard addressing essential requirements or otherprovisions of EU Directives. .8EN 13938-4:2003 (E)3ForewordThis document EN 13938-4:2003 has been prepared by Technical Committee CEN /TC 321, “Explosives for civiluses“, the secretariat of which is held by AENOR.This European Standard shall be given th
16、e status of a national standard, either by publication of an identical text orby endorsement, at the latest by June 2004, and conflicting national standards shall be withdrawn at the latest byJune 2004.This document has been prepared under a mandate given to CEN by the European Commission and the Eu
17、ropeanFree 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.This European Standard is one of a series of standards with the generic title “Explosives for civil uses Pr
18、opellantsand rocket propellants”. The other parts of this series are listed below:prEN 13938-1 Part 1: Requirements.prEN 13938-2 Part 2: Determination of resistance to electrostatic energy.EN 13938-3 Part 3: Determination of deflagration to detonation transition.prEN 13938-5 Part 5: Solid rocket pro
19、pellants. Determination of voids and fissures.prEN 13938-6 Part 6: Solid rocket propellants. Guide for the determination of integrity of inhibitor coatings.prEN 13938-7 Part 7: Determination of the properties of black powder.Annex A is informative.According to the CEN/CENELEC Internal Regulations, t
20、he national standards organizations of the followingcountries are bound to implement this European Standard : Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switze
21、rland and the United Kingdom.1 ScopeThis European Standard specifies a method for the determination of burning rate under ambient conditions forpropellants and black powder.It is applicable to propellants and black powder in their original form up to a grain size of 8 mm.2 Normative referencesThis E
22、uropean Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publicatio
23、ns apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 13938-4:2003 (E)4EN ISO/IEC 17025; General requirements for the competence of testing and calibration lab
24、oratories (ISO/IEC17025:1999).EN 13857-1; Explosives for civil uses - Part 1: Terminology.3 Terms and definitionsFor the purposes of this European Standard, the terms and definitions given in EN 13857-1 and the following apply.3.1burning ratevelocity at which the flame propagates through the sample
25、along the trough4 PrincipleThe test sample is loaded into a trough and the sample is ignited at one end by means of a hot wire. The time offlame propagation through the sample along the trough is measured and the burning rate is calculated.5 Apparatus5.1 Trough, (see Figure 1), consisting of a half
26、cylinder (2 000 1) mm long with a diameter of (20,0 0,8) mm,hollowed out from a stainless steel block. The block is marked at 2 positions, A and B, at distances of (400 1) mmand (1 900 1) mm from the end where the ignition is to take place, respectively. A 2 mm thick stainless steel plateis welded t
27、o each end of the trough to close off the ends.The trough shall be horizontal when set on its support.5.2 Hot wire, as ignition device, consisting of a Ni/Cr wire, diameter (0,40 0,05) mm, length (15 1) mm,heated by a current of 4 A.5.3 Timing device, consisting of a manual stopwatch with a scale di
28、vision of 0,1 s or a recording chronographactivated by suitable detectors located at marks A and B. Black powder shall be tested using a recordingchronograph.EN 13938-4:2003 (E)5Dimensions in millimetresKey1 Hot wire2 Engraved marksA First markB Second markTolerance for all dimensions is 1 mm, excep
29、t 0,8 mm for the diameter of the trough.Figure 1 Stainless steel trough6 Preparation of test sampleCondition the test sample by storing at (20 5) C and (60 10) % relative humidity for at least 24 h immediatelyprior the test.7 ProcedureCarry out two determinations, using separate test portions taken
30、from the test sample.Conduct the test under ambient conditions of temperature and humidity.Ensure that the trough is dry and clean and condition it at (20 10) C.Pour the test sample into the trough so as to fill it flush with the top edge, without packing down the test sample.Level the surface by mo
31、ving a blade across it and record the mass of the test portion.The time between filling the trough and ignition shall not exceed 15 min.Connect the hot wire to the electrical circuit.Maintain the current until the sample ignites (maximum time 60 s).EN 13938-4:2003 (E)6Record the following: tbtime of
32、 flame propagation from mark A (400 mm) to mark B (1900 mm); tf time from mark A to extinction, in case of partial propagation of the sample; df distance travelled by the flame in case of partial propagation of the sample.NOTE This distance should be determined after disconnection of the hot wire an
33、d the cooling of the trough.8 Expression of resultsThe burning rate of the sample under test shall be determined by means of the following equation:WhereV is the burning rate, expressed in millimetres per second (mm/s);1 500 is the distance between the marks expressed millimetres (mm); andtbis the t
34、ime of propagation between the marks, expressed in seconds(s)9 Test reportThe test report shall conform to EN ISO/IEC 17025. In addition the following information shall be given:a) a reference to this standard;b) the complete identification of the sample, including its mass and grain size distributi
35、on;c) the results of all tests in form of: time, tb(s) and burning rate, V (mm/s)or, in case of partial propagation: time, tf(s) and distance, df(mm)d) the mean value of the burning rate obtained from the two tests (mm/s)b5001tV =EN 13938-4:2003 (E)7Annex A(informative)Range of applicability of the
36、test methodRange of applicability of the test method: - 30 C to + 80 C.EN 13938-4:2003 (E)8Annex ZA(informative)Clauses of this European Standard addressing essential requirements orother provisions of EU Directives.This European standard has been prepared under a mandate given to CEN by the Europea
37、n Commission and theEuropean Free Trade Association and supports essential requirements of EU Directive 93/15/EEC.WARNING : Other requirements and other EU Directives may be applicable to the product(s) falling within thescope of this standard.The clauses of this standard are likely to support requi
38、rements I.2 and II.1(a) of Directive 93/15/EEC.Compliance with this standard provides one means of conforming with the specific essential requirements of theDirective concerned and associated EFTA regulations.blankBS EN BSI389 Chiswick High RoadLondonW4 4AL13938-4:2003BSI British Standards Instituti
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