1、AECMA PREN*Z310 88 m L0123LL 0007835 3 M Approved by The equivalenf versions in French and German languages can COMIT DE NORMALISATION be supplied by B.N.A.E, 8, rue Moreau-Vauthier of A.E.C.M.A. 1988-01-18 921 O0 BOULOGNE-BILLANCOURT - FRANCE A.E.C.M.A. STANDARD prEN 2310 NORME A.E.C.M.A. Edition 1
2、 A.E.C.M.A. NORM January 1988 _ DITE PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL 88, boulevard Malesherbes, 75008 PARIS -TL. 45-63-82-85 UDC : Key words ENGLISH VERSION Aerospace series Test methods for the flame resistance rating of non-metallic materials Srie arospatiale Mth
3、odes dessai de comportement au feu pour le classement de matriaux non mtalliques Luft- und Raumfahrt Prfverfahren zur Klassifizierung des Brandverhaltens von nichtmetallischen Werkstoffen This Aerospace series) standard has been drawn up under the responsibility of AECMA (Association Europenne des C
4、onstructeurs de Matriel Arospatial). It is published on yellow paper in three equivalent versions (English, French, German). It will be submitted as a draft European Standard to CEN (European Committee for Standardization) for final vote. Copyright Association Europeene des Constructeurs de Materiel
5、 Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN*E31O 88 m 3012311 O007816 5 mm prEN 2310 Page 2 Foreword This specification is taken from the US Federal Aviation Administration regulation, Part 25, cha
6、nge 21 (Amdt. 2561), from which is makes use of equipment and procedures. It also satisfies the recommendations of the ICA0 Airworthiness Technical Manual : DOC 9051-AN/896, section 4, Issue 1974 (3rd part, section 4, chapter 2) of which equivalences are given in annex A. Contents 1 2 Definitions 3
7、Classification of materials 4 Apparatus 5 Procedure 6 Test report Annex A Scope and field of application 0648SP1287T8 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without licens
8、e from IHS-,-,-AECMA PRENu2330 88 = LOI12333 0007837 7 - prEN 2310 Page 3 1 Scope and field of application The object of this standard is to define the test methods for the flame resistance rating of non-metallic materials. It applies exclusively to materials whose specific standard requires this ty
9、pe of test. It cannot be substituted for the Statutory Tests required for a final specific use of the material concerned. 2 Definitions 2.1 Time of flame application Time during which the burner flame is applied to the lower part of the test piece. It shall be expressed in seconds. 2.2 Average flami
10、ng time of droplets For each test material, this is the average time that droplets, released by the test piece, continue to burn after falling. It is expressed in seconds. 2.3 Average after flame time This is the average time, during which the test piece continues to burn after the burner flame has
11、been withdrawn. It is expressed in seconds. 2.4 Average burn length For each test material, this is the average distance 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, partia
12、l or total embrittlement but excludes areas which have become blackened, stained, distorted, discoloured, or have shrivelled or melted by the heat. The measurements shall be expressed in millimetres. 2.5 Average rate of combustion Average rate to be calculated for each test piece by taking the quoti
13、ent of the distance covered by a flame between two suitable reference points by the time taken. Measurements shall be expressed in mm/min. 0648SP1287T8 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or n
14、etworking permitted without license from IHS-,-,-AECMA PREN*23LO 88 1iOL23Ll 0007BL8 9 -1 prEN 2310 Page 4 3 Classification of materials 3.1 Classes (a) and (b) These categories classify materials tested in accordance with paragraph 5.2 and the requirements of the table 1, 3.2 Classes (b2) and (b3)
15、These categories classify materiah tested in accordance with paragraph 5.3 and meet the requirements of table 1. Materials which are self-extinguishing shall be classified (b2). 3.3 Requirements Table 1 verage Average Average Average lest after- f ami ng fl3ll.e time of time droplets length coabus t
16、 ion dinens ions turn rzte of pi ecr t Tine of f 1 zLe burrier clrio., TYP f 1 an,e application of of fiaterial Seconds leinp. OC (a) Vertical 60 see 4.5.2 (LI 12 0648SP1287T8 I l leight Seconds Seconds mni sm/min mm L - . - Mai Copyright Association Europeene des Constructeurs de Materiel Aerospati
17、al Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN*Y310 88 M 1012311 0007819 O = prEN 2310 Page 5 4 Apparatus 4.1 Burner (see figure 6) 4.1.1 The burner shall comprise of a barrel of internal diameter 9,5 mm and le
18、ngth 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, approximately 3 mm in diameter shall be supported parallel and at a distance of 13 mm to the burner barrel. Th
19、is retractable rod shall include various reference marks enabling distances of 19 and 38 mm above the barrel to be measured. 4.2 Gas mixture Gases used shall permit compliance with the flame temperatures specified in paragraphs 5.2.2 and 5.3.2. Standard propane is generally suitable for this test me
20、thod. * If industrial gas is not available, a synthetic gaseous mixture conforming with the following requirements may be used (standard conditions of analysis) : - Hydrogen : 55 -I- - 3% 24 + 1% - - Methane : 3 + 1% - - Ethane - Carbon monoxide : 18 - + 1%. Density : 0,365 + - 0,018 (air = 1) + 746
21、 O Calorific power at 21C (when dry) : 20120 kJ /n3 4.3 Chamber for vertical test (see figures 1, 2 and 3) The chamber and its accessories shall be manufactured in conformity with the information provided in figures 1, 2 and 3 from galvanised plate or other suitable metal. The inside rear wall shall
22、 be completely painted black to facilitate observation of the test piece and the flame. The observation window shall be manufactured from heat resistant glass. O648 SP 128 7T8” Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for R
23、esaleNo reproduction or networking permitted without license from IHS-,-,-prEN 2310 Page 6 AECMA PRENi23LO 88 W LO123LL 000%320 7 M T 4.4 Chamber for horizontal test (see figures 4 and 5) 4.4.1 The metal chamber and its accessories shall be manufactured in conformity with the information provided in
24、 figures 4 and 5. It shall include a glass observation window (B) and a removable cover (C), having a peripheral clearance of 13 mm for ventilation, This removable cover shall have two observa- tion ports (D) of heat resistant glass, located near the end of the chamber. The four corners of the chamb
25、er base shall rest on a support (J) raising it 10 mm above the surface of the table or any other piece of furniture on which it is located. Each side of the chamber base shall have five equally spaced ventilation holes (O) of 19 mm diameter. A slot in one side of the chamber shall permit the test pi
26、ece holder to be passed through and slid horizontally, along a rail (K), into a test position (P), such that the centre of the edge of the test piece is located 19 mm above the top of the burner. 4.4.2 The test piece holder (figure 5), made of chrome or nickel plated steel bars shall be in the form
27、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 the upper frame, crossing the test piece at right angles but not touching it, One wire shall be located 51 mm from the inside of the burner
28、 side of the frame and the other, 38 mm from the other side. A third wire, running transversely on the upper frame, shall be located 13 mm from the inside on the burner 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
29、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 and 19 mm above the top of the burner. 4.5 Measuring equipment 4.5.1 Timing device with a readability of 0,2 s. 4.5.2 Measuring device graduated in mm. 0648SP1287T8 Copyright As
30、sociation Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN*2310 88 10L2311 0007821 7 - prEN 2310 Page 7 5 Procedure 5.1 Test pieces 5.1.1 Test piece dimensions 5.1
31、.1.1 Vertical tests : 368 x 75 mm 7 i 5.1.1.2 Horizontal tests : 355 x 102 mm The test piece thickness shall be that indicated in the relevant material standard. In the case of extremely thick cellular materials (foams) the test piece shall not be more than 13 mm thick. The edges of the test piece s
32、hall 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 (Refer to special cases described in paragraph 5.1.4). 5
33、.1.3 Conditioning of test pieces Test pieces shall be conditioned at a minimum temperature of 18C End a maximum temperature of 24C and relative humidity of (50 & 5)% until a moisture equilibrium is obtained, or for 24 h. Only one test piece at a time shall be withdrawn from the conditioning environm
34、ent : testing shall be carried out immediately after removal. 5.1.4 Mounting of test pieces For the tests, the test specimens 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
35、 two lengths and the edge of the test piece away from the flame shall be firmly held. 0648SP12878 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA
36、 PREN*i!3LO 88 = LOL23LL OUUt122 O prEN 2310 Page 8 3) During the vertical tests, the exposed portion of the test piece shall be at least 51 mm wide and 356 mm long, During the horizontal tests, the exposed portion of the test piece shall be at least 51 mm wide and 330 mm long. When materials exhibi
37、t a directionality in manufacture (e.g. .fabrics or extruded products), they shall be tested in the longitudinal direction and at 90“ 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 direction. Th
38、e test pieces shall be cut in a given direction and from different areas of the test material. 5.2 Vertical tests 5.2.1 The test piece holder shall be suspended vertically in the chamber in accordance with the requirements of subclause 5.1.4, such that the lower edge of the test piece is 19 mm above
39、 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 adjusted to give a height of 38 mm, ie. the top of the flame shall be level with the upper mark of the metal rod used as measuring gauge, The flame temperature
40、 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 the burner (19 mm above the top of the burner). The flame temperature shall be : f 30C - 10C 85OoC If the burner has an air entry, this has to be close
41、d 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 for 60 s and then withdrawn. For materials listed under class (b), th
42、e flame shall be applied for 12 s and then withdrawn. The after flame time, the burn length as well as the flaming time of droplets if any shall be recorded. The after flame time and flaming time of droplets shall be measured to within 0,2 s. The burn length shall be measured to within 2 mm. To do s
43、o, wherever possible the test piece shall be cut along its longitudinal axis. 0648SP1287T8 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN*2
44、31O 88 1012311 0007823 2 W I -I prEN 2310 Page 9 5.2.4 Before commencing the next test, all traces of smoke and burnt residue shall be cleared from the chamber. 5.3 Horizontal tests 5.3.1 The test holder is slid into the rail (K) into the test position (P) such that the edge of the test piece is 19
45、mm above the centre and in the axis of the burner barrel. A woven material whose texture on one surface differs considerably from the texture on the other surface shall be tested 4 times : 2 test pieces being exposed to the flame on one side and 2 test pieces being exposed to the flame on the other
46、side. The test equipment shall be installed in an area free from air draughts. 5.3.2 The burner flame shall be set to the conditions of paragraph 5.2.2. 5.3.3 After positioning the test piece holder, the burner flame shall be applied for 15 s and then withdrawn. If the material continues to burn, wa
47、it until the flame reaches the second reference wire located at 51 mm from the inner edge of the holder before starting the timing device. This distance of 254 mm between the reference wires (see paragraph 4.4.3) is used to measure the rate of combustion. The time taken to traverse this distance sha
48、ll be measured to within 0,2 s and recorded. 5.3.4 If a material is self-extinguishing, the after flame time shall be measured to within 0,2 s and recorded. The burn length shall be measured to within 2 mm and recorded. To do so, whenever possible, the test piece shall be cut along its longitudinal
49、axis. 5.3.5 Before commencing the next test, all traces of smoke and burnt residue shall be cleared from the chamber. O 64 8 S 1 1 2 8 7 T8 Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMANot for ResaleNo reproduction or networking permitted without license from IHS-,-,-AECMA PREN*23LO 88 m LO12311 OO7824 4
