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. AECMA PREN*E31O 88 m 3012311 O007816 5 mm prEN 2310 Page 2 Fo
5、reword This specification is taken from the US Federal Aviation Administration regulation, Part 25, change 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 (
6、3rd part, section 4, chapter 2) of which equivalences are given in annex A. Contents 1 2 Definitions 3 Classification of materials 4 Apparatus 5 Procedure 6 Test report Annex A Scope and field of application 0648SP1287T8 AECMA PRENu2330 88 = LOI12333 0007837 7 - prEN 2310 Page 3 1 Scope and field of
7、 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 type of test. It cannot be substituted for the Statutory Tests required for a final specific use
8、 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 flaming time of droplets For each test material, this is the average time that droplets, released b
9、y 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 been withdrawn. It is expressed in seconds. 2.4 Average burn length For each test material, th
10、is 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, partial or total embrittlement but excludes areas which have become blackened, stained, distorted, d
11、iscoloured, 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 quotient of the distance covered by a flame between two suitable reference points by the time taken
12、. Measurements shall be expressed in mm/min. 0648SP1287T8 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)
13、and (b3) 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
14、 coabus t 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 AECMA PREN*Y310 88 M 1012311 0007819 O = prEN 2310 Page 5 4 Ap
15、paratus 4.1 Burner (see figure 6) 4.1.1 The burner shall comprise of a barrel of internal diameter 9,5 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
16、, approximately 3 mm in diameter shall be supported parallel and at a distance of 13 mm to the burner barrel. This 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 fla
17、me temperatures specified in paragraphs 5.2.2 and 5.3.2. Standard propane is generally suitable for this test method. * 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%
18、24 + 1% - - Methane : 3 + 1% - - Ethane - Carbon monoxide : 18 - + 1%. Density : 0,365 + - 0,018 (air = 1) + 746 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 info
19、rmation provided in figures 1, 2 and 3 from galvanised 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 window shall be manufactured from heat resistant glass. O648 SP 128 7T8” prEN 2310 P
20、age 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 figures 4 and 5. It shall include a glass observation window (B) and a removable cov
21、er (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 chamber base shall rest on a support (J) raising it 10 mm above the surface of the table o
22、r 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 piece holder to be passed through and slid horizontally, along a rail (K), into a test
23、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 of two fitted rectangular frames. The two frames shall be aligned by means of two stu
24、ds (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 side of the frame and the other, 38 mm from the other side. A third wire, running tr
25、ansversely 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 in such a way that when the test piece is in position, the center point of the end of
26、 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 AECMA PREN*2310 88 10L2311 0007821 7 - prEN 2310 Page 7 5 Procedure 5.1 Test pieces 5.1.1 Test pi
27、ece dimensions 5.1.1.1 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 o
28、f 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 (Refer to special cases described in p
29、aragraph 5.1.4). 5.1.3 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 con
30、ditioning environment : 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) Hori
31、zontal tests : the two lengths and the edge of the test piece away from the flame shall be firmly held. 0648SP12878 AECMA 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 ho
32、rizontal tests, the exposed portion of the test piece shall be at least 51 mm wide and 330 mm long. When materials exhibit 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 critic
33、al flammability conditions. To do so, the lengths of the test pieces shall be respectively parallel to each direction. The 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
34、chamber in accordance with the requirements of subclause 5.1.4, such that the lower edge of the test piece is 19 mm 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 adjusted to give a height of 38 mm, ie
35、. 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 the burner (19 mm above the to
36、p of the burner). The flame temperature shall be : f 30C - 10C 85OoC 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
37、 listed under class (a), the flame shall be applied for 60 s and then withdrawn. For materials listed under class (b), the 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
38、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 so, wherever possible the test piece shall be cut along its longitudinal axis. 0648SP1287T8 AECMA PREN*231O 88 1012311 0007823 2 W I -I prEN 2310 Page 9 5.2.4 Before commencing the
39、 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 mm above the centre and in the axis of the burner barrel. A woven material w
40、hose 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 side. The test equipment shall be installed in an area free from air draught
41、s. 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, wait until the flame reaches the second reference wire located at 51 mm from t
42、he 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 shall be measured to within 0,2 s and recorded. 5.3.4 If a material is self-ext
43、inguishing, 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 axis. 5.3.5 Before commencing the next test, all traces of smoke and burnt r
44、esidue shall be cleared from the chamber. O 64 8 S 1 1 2 8 7 T8 AECMA PREN*23LO 88 m LO12311 OO7824 4 I. prEN 2310 Page 10 6 Test report 6.1 Upon completion of all the tests, the average of the recorded values shall be calculated : 6.1.1 For vertical tests - Flaming time of droplets, if any, - After
45、 flame time, - Burn length. 6.1.2 For horizontal. tests - Rate of combustion And if applicable : - After flame time, - Burn length. 6.2 For each material tested a test report shall be prepared. The test report shall include the following : - Number of this standard, - The precise designation and ref
46、erence of the product tested, - The name and address of the manufacturer and if different, the name and address of the supplier, - A table corresponding to the type of test carried out, including batch number and the following information : - The measurements taken on 3 or 5 test pieces, - The avera
47、ge values obtained, - The summary of the limits imposed by this standard or by the relevant material standard, - The result : PASS or FAIL. AECMA PREN82310 88 1012311 0007825 b I/ Test siiecinion Iiolder t8srigc.r - prEN2310 Page 11 - Vertical specimen holder stop Figure 1 - General view of vertical
48、 test chamber 0648SP1287TE AECMA PREN*23LO BB LOL23LL 000782b B W: prEN23i Page i2 Dimensions in millimetres Details not shown are at the discretion of the manufacturer. View (RH side panel removed) I 6 holes 6 13 (both slies) Kote : When dimensions are given tolermces apply : .Sec:t:i on AA of door
49、 without tolerance indication, the following Nominal dimensions 315 !mm) - 1 +2 - + 1,2 - + 0,5 . - -I- 0,8 Tolerances (mm) - + O,? - Figure 2 - Vertical test cllaniber 0648SP1287T8 8 8 * Rominal dimension (md - 315 +2 - t- 1,2 - + 0,8 - + 0,5 - prEN2310 Page 13 Dimensions in millimetres Details not shown are at the discretion of the manufacturer. Thiwdcd over a lenoth of 25 at each end Specimen holder hanger: for a length of 25 -. SDecimen holder sumort lu LJ SDecimen holder Note : L%en dimensions are given without tolerances (except thread
