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1、BRITISH STANDARD BS EN 268:1991 Specification for Propellants for commercial ammunition Requirements and test methods This European Standard EN 268:1991 has the status of a British Standard Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 08:54:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS
2、EN 268:1991 This British Standard was published under the authority of the Standards Board and comes into effect on 30 August 1991 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference CIC/46 Draft for comment 87/55584 DC ISBN 0 580 19848 0 Cooperating org
3、anizations The European Committee for Standardization, under whose supervision this European Standard was prepared, comprises the national standards organizations of the following Western European countries. AustriaOesterreichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDans
4、k Standardiseringsraad FinlandSuomen Standardisoimisliito, r.y. FranceAssociation franaise de normalisation GermanyDeutsches Institut fr Normung e.V. GreeceHellenic Organization for Standardization IcelandTechnological Institute of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Naz
5、ionale Italiano di Unificazione LuxemburgInspection du Travail et des Mines NetherlandsNederlands Normalisatie-instituut NorwayNorges Standardiseringsforbund PortugalInstituto Portugus da Qualidade SpainAsociacin Espaola de Normalizacin y Certificacin SwedenStandardiseringskommissionen i Sverige Swi
6、tzerlandAssociation suisse de normalisation United KingdomBritish Standards Institution Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 08:54:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 268:1991 BSI 10-1999i Contents Page Cooper
7、ating organizationsInside front cover National forewordii Foreword2 Text of EN 2683 National appendix NA (informative)Inside back cover Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 08:54:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 268:1991 ii BSI 10-1999 National foreword This Brit
8、ish Standard has been prepared under the direction of the Chemicals Standards Policy Committee and is the English language version of EN 268:1991 “ Propellants for commercial ammunition Requirements and test methods” , published by the European Committee for Standardization (CEN). It has been assume
9、d in the drafting of this British Standard that it will be used and applied by those who are appropriately qualified. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a
10、 British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 8, an inside back cover and a back cover. This standard has been updated (see copyright date) and
11、may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 08:54:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ? EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 268 March 1991 UDC 662.3:62
12、0.1 Descriptors: Ammunition, powdery materials, consumer information, specifications, sampling, definitions, tests, sensitivity, thermal stability English version Propellants for commercial ammunition Requirements and test methods Poudres propulsives pour les munitions du commerce Exigences et mthod
13、es d essai Treibladungspulver fr Handelsmunition Anforderungen und Prfverfahren This European Standard was approved by CEN on 11 March 1991. CEN members are bound to comply with the requirements of the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
14、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 Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, Germ
15、an). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, G
16、ermany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels CEN 199
17、1 Copyright reserved to all CEN members Ref. No. EN 268:1991 E Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 08:54:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ? EN 268:1991 BSI 10-1999 2 Foreword This European Standard was prepared by technical committee CEN/TC 111 “ Propellants for comme
18、rcial ammunition” , for which the Secretariat is held by the Institut Belge de Normalisation (IBN). This technical committee was created in May 1984 in answer to a request of the Association of European Manufacturers of Sporting Ammunition (AFEMS). The study of the original AFEMS proposal was starte
19、d at the first TC 111 meeting in October 1984 and was continued at the meetings held in June 1985 and May 1986. Out of these deliberations came a draft proposal which was mainly inspired by the tests and criteria of tests series 3 of the Recommendations on the transport of dangerous goods Tests and
20、criteria United Nations. The final draft was submitted for Formal Vote and approved. In accordance with the Common CEN/CENELEC Rules the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg
21、, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Contents Page Foreword2 1Scope3 2Reference3 3Information to be provided by the manufacturer of the propellant3 4Sampling3 5Stability and sensitiveness tests and requirements5 6Test report6 Annex (informative) A Type nati
22、onal deviation7 Figure 1 Sampling scheme4 Table Minimum number of containers to be sampled4 Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 08:54:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ? EN 268:1991 BSI 10-19993 1 Scope This European Standard specifies a) the information to be provided
23、 by the manufacturer concerning the production process, the chemical composition and the physical characteristics b) the stability and sensitiveness type-tests and requirements for propellant powders intended for use in commercial ammunition in order to ensure their safe storage and handling and the
24、ir safe use for this type of ammunition. 2 Reference Recommendations on the transport of dangerous goods Test and Criteria First edition United Nations, New York, 1986 (ST/SG/AC.10/11). 3 Information to be provided by the manufacturer of the propellant 3.1 Name and address of the manufacturer 3.2 Co
25、mmercial name of the propellant 3.3 Indication of the manufacturing process: Ball process; Extrusion process; Rolling process; Other (to be described briefly). 3.4 Chemical composition of the propellant, expressed as percentages by mass More specifically, the following composition details shall be g
26、iven: stabilizer and plasticizer content, nitrocellulose and nitroglycerine content, graphite and/or acetylene black content, moisture content. State the methods of analysis employed by reference to an existing standard or by a complete description. 3.5 Physical characteristics of the propellant Mor
27、e specifically, the following elements shall be given: the appearance of the propellant: colour, shape of the particles (flake, disc, tube, rod, .), the bulk density of the propellant (stating the method of determination employed by reference to an existing standard or by a complete description), th
28、e nominal dimensions of the propellant particles. 4 Sampling NOTEThe sampling procedure described in this clause only considers sampling from a lot of containers. 4.1 Definitions For the purpose of this standard, the following definitions apply: 4.1.1 lot a definite quantity of propellant packed in
29、a definite number of containers and produced under conditions which are presumed uniform. The extent of a lot can be given in a natural way (one consignment, the production of a given period, etc.) or in an arbitrary way by agreement between the parties concerned 4.1.2 increment a quantity of propel
30、lant obtained by a sampling device at one time from a single lot 4.1.3 gross sample the quantity of propellant consisting of all the increments taken from a single lot 4.1.4 blended gross sample the quantity of propellant consisting of all the increments from a single lot blended together to obtain
31、a uniform gross sample 4.1.5 laboratory sample a sample prepared by reduction of the blended gross sample without change in composition and intended for the laboratory which is to carry out the necessary tests 4.1.6 reference sample a sample prepared at the same time as, and identical with, the labo
32、ratory sample, which is acceptable to the parties concerned and retained for use as a laboratory sample if a disagreement occurs 4.1.7 storage sample a sample prepared at the same time as, and identical with, the laboratory sample, and intended for possible future use as a laboratory sample 4.1.8 te
33、st portion a quantity of propellant taken from the laboratory sample and on which the test or observation is actually carried out Licensed Copy: sheffieldun sheffieldun, na, Fri Nov 03 08:54:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ? EN 268:1991 4 BSI 10-1999 4.2 Sampling procedure The sampling
34、 procedure is schematically represented in Figure 1. Prepare a gross sample of at least 6 kg for each lot by sampling the number of containers indicated in the Table. Table Minimum number of containers to be sampled Select the containers to be sampled at random throughout the lot. Take from every se
35、lected container several increments from different places in such a manner that the gross sample will be representative of the lot as accurately as possible. The mass of each increment shall be approximately constant, the total mass of increments being at least 6 kg. The number of increments taken p
36、er container shall be constant. If containers holding different quantities are included in the lot, the containers selected shall be representative of the lot and the number and total mass of increments taken from every selected container shall be in proportion to the content of the container. Assem
37、ble all increments and mix thoroughly with a suitable device so as to obtain the blended gross sample. Figure 1 Sampling scheme Total number of containers in the lot Minimum number of containers to be sampled 1 to 2All 3 to 82 9 to 253 26 to 1005 101 to 5008 501 or more13 Licensed Copy: sheffieldun
38、sheffieldun, na, Fri Nov 03 08:54:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ? EN 268:1991 BSI 10-19995 4.3 Preparation of laboratory samples Prepare a laboratory sample, a reference sample and a storage sample, all three being identical, of at least 2 kg each, by splitting or reducing the blende
39、d gross sample. Pack the three laboratory samples in suitable, clean sample containers and stopper. 4.4 Labelling, transport and storage of samples Label the containers holding the samples as soon as they are taken. The labels shall bear all the necessary information to enable the samples to be iden
40、tified without dispute (propellant description, an indication of the lot, place and date of sampling, name of sampler, sample mass, .). The label and marking ink used shall be capable of withstanding the transport and storage conditions. Attach the label to the neck or body of the container. After c
41、losure and labelling, the sample container shall be sealed in such a way that the contents and the label cannot be removed without breaking the seal. Precautions shall be taken to avoid contamination of the sample. During transport and storage the samples shall be protected from light, moisture, dus
42、t and excessive heat or cold. NOTEProtection against moisture and dust may be obtained by covering the stopper and top of the container with a cap of paper, plastics material or metal. Sample containers shall be accompanied by a delivery note repeating the details given on the label and by a report
43、giving all the sampling details. 4.5 Test portions Take the necessary test portions from the laboratory sample. 5 Stability and sensitiveness tests and requirements NOTEThe propellant meets the requirements for the intended characteristics, if it passes the test of subclause 5.3 and one of the tests
44、 of each of subclauses 5.1, 5.2 and 5.4. 5.1 Sensitiveness to mechanical impact Conduct the test according to one of the methods given under test type a) of test series 3 of the UNO Recommendations (1986). If test method v) is used, M 2525 sp conditions (see subclause 24.2 of the UNO Recommendations
45、) apply. If test method i) is used, the propellant shall not be impact sensitive at a drop height of 10,16 cm, according to the criteria of subclause 20.4.1 of the UNO Recommendations. If test method ii) is used, the propellant shall have a limiting impact energy of more than 2 J, according to the c
46、riteria of subclause 21.4 of the UNO Recommendations. If test method iii) is used, the propellant shall have a figure of insensitiveness (F of I) of more than 80, according to the criteria of subclause 22.4.1 of the UNO Recommendations. If test method iv) is used, the propellant shall show no propag
47、ation at a drop height of 75 cm, according to the criteria of subclause 23.4 of the UNO Recommendations. If test method v) is used, the propellant shall have an impact sensitiveness of at least 12,5 cm, according to the criteria of subclause 24.4 of the UNO Recommendations. 5.2 Sensitiveness to fric
48、tion Conduct the test according to one of the methods given under test type b) of test series 3 of the UNO Recommendations (1986). If test method i) is used, the propellant shall have a limiting load of at least 80 N, according to the criteria of subclause 25.4 of the UNO Recommendations. If test me
49、thod ii) is used, the propellant shall have a figure of friction (F of F) greater than 3,0, according to the criteria of subclause 26.4 of the UNO Recommendations. If test method iii) is used, the propellant shall have a threshold of initiation (TIL) greater than that of dry PETN (pentaerythritol tetranitrate), according to the criteria of subclause 27.4 of the UNO Recommendations. 5.3 Thermal stability Conduct the test according to the test type c) o