1、BRITISH STANDARD AEROSPACE SERIES BS EN 2310:1991 Test methods for the flame resistance rating of non-metallic materials This European Standard EN2310:1991 has the status of a British StandardBSEN2310:1991 This British Standard was published under the authority ofthe Standards Boardand comesinto eff
2、ect on 30August1991 BSI 11-1999 The following BSI references relate to the work on this standard: Committee reference ACE/65 Draft for comment90/72561 DC ISBN 0 580 19842 1 Cooperating organizations The European Committee for Standardization, under whose supervision this European Standard was prepar
3、ed, comprises the national standards organizations of the following Western European countries. Austria Oesterreichisches Normungsinstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation
4、 Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Iceland Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands N
5、ormalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Normalizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amend
6、ments issued since publication Amd. No. Date CommentsBSEN2310:1991 BSI 11-1999 i Contents Page Cooperating organizations Inside front cover National foreword ii Foreword 2 Text of EN 2310 3 National appendix NA Inside back coverBSEN2310:1991 ii BSI 11-1999 National foreword This British Standard has
7、 been prepared under the direction of the Aerospace Standards Policy Committee and is the English language version of EN2310:1991 “Aerospace series Test methods for the flame resistance rating of non-metallic materials” published by the European Committee for Standardization (CEN). EN2310:1991 was p
8、roduced as a result of international discussion in which theUK took an active part. 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 British Standard does not of itse
9、lf confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, theEN title page, pages2 to14, aninside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. T
10、his will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2310 March 1991 UDC 620.16:536.468:620.2:629.7 Descriptors: Aircraft industry, non metallic sections, fire tests, filing, reaction to fire, flammability testing English version
11、 Aerospace series Test methods for the flame resistance rating of non-metallic materials Srie arospatiale Mthodes dessai de comportement au feu pour le classement des matriaux non mtalliques Luft- und Raumfahrt Prfverfahren zur Klassifizierung des Brandverhaltens von nichtmetallischen Werkstoffen Th
12、is European Standard was approved by CEN on6 March1991. CEN members are bound to comply with the CEN/CENELEC Common 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 ref
13、erences 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, German). A version in any other language made by translation under the responsibility of a CEN member
14、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, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden,
15、 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 CEN1991 Copyright reserved to all CEN members Ref.No.EN2310:1991EEN2310:1991 BSI 11-1999 2 Foreword This
16、specification is taken from the US Federal Aviation Administration regulation, Part25, change21 (Amdt.2561), from which it makes use of equipment and procedures. It also satisfies the recommendations of the ICAO Airworthiness Technical Manual: DOC9051-AN/896, section4, Issue1974(3rd part, section4,
17、chapter2) of which equivalences are given in Annex A. This European Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this Standard has successively received the approval
18、of the National Associations and the Official Services of the member countries of AECMA, prior to its presentation to CEN. According to the Common CEN/CENELEC Rules, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Ic
19、eland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. Contents Page Foreword 2 1 Scope and field of application 3 2 Definitions 3 3 Classification of materials 3 4 Apparatus 4 5 Procedure 5 6 Test report 7 Annex A 14 Figure 1 General view of
20、vertical test chamber 8 Figure 2 Vertical test chamber 9 Figure 3 Vertical test accessories 10 Figure 4 Horizontal test chamber 11 Figure 5 Specimen holder for horizontal test 12 Figure 6 Burner 13 Table 1 4 Table 2 Requirement classification andequivalents 14EN2310:1991 BSI 11-1999 3 1 Scope and fi
21、eld of application This standard defines the test methods for the flame resistance rating of non-metallic materials. It applies exclusively to materials whose specific standard requires this type of test. It cannot be substituted for the statutory tests required for a final specific use of the mater
22、ial concerned. 2 Definitions 2.1 time of flame application time measured by means of a chronometer, during which the burner flame is applied to the lower part of the test piece. It is expressed in seconds 2.2 average flaming time of droplets average of the time measured for each test piece, during w
23、hich droplets, released by the test piece, continue to burn after falling. It is expressed in seconds 2.3 average after flame time average of the time measured for each test piece, during which the test piece continues to burn after the burner flame has been withdrawn. It is expressed in seconds 2.4
24、 average burn length average of the distances measured for each test piece from the original edges of the test pieces to the farthest extent of damage resulting from flame impingement. This includes areas which have undergone combustion, charring, partial or total embrittlement but excludes areas wh
25、ich have become blackened, stained, distorted, discoloured, or have shrivelled or melted by the heat. The measurements are expressed in millimetres 2.5 average rate of combustion average rate calculated for each test piece by taking the quotient of the distance covered by a flame between two suitabl
26、e reference points by the time taken. Measurements are expressed in mm/min 3 Classification of materials 3.1 Classes (a) and (b) These categories classify materials tested in accordance with subclause5.2 and the requirements of the Table 1. 3.2 Classes (b2) and (b3) These categories classify materia
27、ls tested in accordance with subclause5.3 and meet the requirements of Table 1. Materials which are self-extinguishing shall be classified (b2).EN2310:1991 4 BSI 11-1999 3.3 Requirements Table 1 4 Apparatus 4.1 Burner (see Figure 6) 4.1.1 The burner shall comprise of a barrel of internal diameter9,5
28、mm and length(76 6)mm with a fixed upper orifice and a base with a variable orifice for adjusting flame height. It shall be connected to a gas supply fitted with a stopcock. 4.1.2 A metallic rod, approximately3mm in diameter shall be supported parallel and at a distance of13mm to the burner barrel.
29、This retractable rod shall include various reference marks enabling distances of19and38mm above the barrel to be measured. 4.2 Gas mixture Gases used shall permit compliance with the flame temperatures specified in subclauses5.2.2 and5.3.2. Standard propane is generally suitable for this test method
30、. If industrial gas is not available, a synthetic gaseous mixture conforming with the following requirements may be used (standard conditions of analysis): Density: 0,365 0,018(air=1) Calorific power at21 C (when dry): 4.3 Chamber for vertical test (see Figure 1, Figure 2 and Figure 3) The chamber a
31、nd its accessories shall be manufactured in conformity with the information provided in Figure 1, Figure 2 and Figure 3 from galvanized plate or other suitable metal. The inside rear wall shall be completely painted black to facilitate observation of the test piece and the flame. The observation win
32、dow shall be manufactured from heat resistant glass. 4.4 Chamber for horizontal test (see Figure 4 and Figure 5) 4.4.1 The metal chamber and its accessories shall be manufactured in conformity with the information provided in Figure 4 and Figure 5. It shall include a glass observation window (B) and
33、 a removable cover(C), having a peripheral clearance of13mm for ventilation. This removable cover shall have two observation ports (D) of heat resistant glass, located near the end of the chamber. The four corners of the chamber base shall rest on a support (J) raising it10mm above the surface of th
34、e table or any other piece of furniture on which it is located. Each side of the chamberbase shall have five equally spaced ventilation holes (O) of19mm diameter. A slot in one side of the chamber shall permit the test piece holder to be passed through and slid horizontally, along a rail (K), into a
35、 test position (P), such that the centre of the edge of the test piece is located19mm above the top of the burner. Class of material Type of test Time of flame application Burner flame Average after-flame time Average flaming time of droplets Average burn length Average rate of combustion Test piece
36、 dimensions Seconds Temp. C Height mm Seconds Seconds mm u mm/min. u mm (a) Vertical (see sub-clause5.2) 60 38 15 3 152 368 75 (b) 12 5 203 (b2) Horizontal (see sub-clause5.3) 15 63 355 102 (b3) 102 Hydrogen: (55 3)% Methane: (24 1)% Ethane: (3 1)% Carbon monoxide: (18 1)%. 850 +30 10 20 120 +746 0k
37、J/m 3 .EN2310:1991 BSI 11-1999 5 4.4.2 The test piece holder (Figure 5), made of chrome or nickel plated steel bars shall be in the form of two fitted rectangular frames. The two frames shall be aligned by means of two studs (M). 4.4.3 Heat resistant metallic reference wires (N) shall be fixed to th
38、e upper frame, crossing the test piece at right angles but not touching it. One wire shall be located51mm from the inside of the burner side of the frame and the other,38mm from the other side. A third wire, running transversely on the upper frame, shall be located13mm from the inside on the burner
39、side. This shall act as a guide for positioning the test piece in its holder. 4.4.4 The burner (E) shall be located in the chamber in such a way that when the test piece is in position, the center point of the end of the test piece is on the centre line and19mm above the top of the burner. 4.5 Measu
40、ring equipment 4.5.1 Timing device with an accuracy of0,2s. 4.5.2 Measuring device graduated in mm. 5 Procedure 5.1 Test pieces 5.1.1 Test piece dimensions 5.1.1.1 Vertical tests: 355mm 102mm In the case of extremely thick cellular materials (foams) the test piece shall not be more than13mm thick. T
41、he edges of the test piece shall not consist of a finished production edge but shall be representative of an actual cut of the material. 5.1.2 Number of test pieces At least three test pieces shall be subjected to testing. This shall be increased to five if doubt arises (seesubclause5.1.4, special c
42、ases). 5.1.3 Conditioning of test pieces Test pieces shall be conditioned at a minimum temperature of18 C and a maximum temperature of24 C and relative humidity of(50 5)% until a moisture equilibrium is obtained, or for24h. Only one test piece at a time shall be withdrawn from the conditioning envir
43、onment; testing shall be carried out immediately after removal. 5.1.4 Mounting of test pieces For the tests, the test piece shall be clamped in their metal frame as follows: 1) Vertical tests: the two long edges and the upper edge of the test piece shall be firmly held, 2) Horizontal tests: the two
44、lengths and the edge of the test piece away from the flame shall be firmly held, 3) During the vertical tests, the exposed part of the test piece shall be at least51mm wide and356mm long. During the horizontal tests, the exposed part of the test piece shall be at least51mm wide and330mm long. When m
45、aterials exhibit a directionality in manufacture (e.g.fabrics or extruded products), they shall be tested in the longitudinal direction and at90 across it, in order to assess the most critical flammability conditions. To do so, the lengths of the test pieces shall be respectively parallel to each di
46、rection. The test pieces shall be cut in a given direction and from different areas of the test material. 368mm 75mm The test piece thickness shall be that indicated in the relevant material standard. 5.1.1.2 Horizontal tests: EN2310:1991 6 BSI 11-1999 5.2 Vertical tests 5.2.1 The test piece holder
47、shall be suspended vertically in the chamber in accordance with the requirements of subclause5.1.4, such that the lower edge of the test piece is19mm above the top of the burner. The test equipment shall be installed in an environment free from air currents. 5.2.2 The flame shall be ignited and adju
48、sted to give a height of38mm, ie.the top of the flame shall be level with the upper mark of the metal rod used as measuring gauge. The flame temperature shall be measured using a pyrometer with calibrated thermocouple located in its centre part and level with the lower mark of the measuring gauge of
49、 the burner(19mm above the top of the burner). The flame temperature shall be: If the burner has an air entry, this has to be closed and sealed by an adhesive tape. 5.2.3 The burner flame shall then be applied to the centre of the lower edge of the test piece with the door of the cabinet closed. For materials listed under class (a), the flame shall be applied for60s and then withdrawn. For materials listed under class (b), the flame shall be applied for12s and then withdrawn. The after flam
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