1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 3844-3:2011Aerospace series Flammability of non metallicmaterialsPart 3: Small burner test, 45 Determination of the resistance of materialto flame and glow propagation and
2、toflame penetrationBS EN 3844-3:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 3844-3:2011.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/65, Non-metallic materials for aerospace purposes(excluding textiles).A list of organ
3、izations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 73881 4ICS 49.025.15Compliance with a British Standard ca
4、nnot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 November 2011.Amendments issued since publicationDate Text affectedBS EN 3844-3:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3844-3 Novem
5、ber 2011 ICS 49.025.15 English Version Aerospace series - Flammability of non metallic materials - Part 3: Small burner test, 45 - Determination of the resistance of material to flame and glow propagation and to flame penetrationSrie arospatiale - Inflammabilit des matriaux non mtalliques - Partie 3
6、: Essai au brleur, 45 - Dtermination de la rsistance du matriau la propagation de la flamme et de lincandescence et la pntration de flammes Luft- und Raumfahrt - Entflammbarkeit nicht metallischer Werkstoffe - Teil 3: Kleinbrenner - Prfung 45 - Bestimmung der Bestndigkeit eines - Materials gegen die
7、 Ausbreitung von Flammen und Glimmen und gegen Durchbrennen This European Standard was approved by CEN on 10 February 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard wit
8、hout any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other
9、 language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, D
10、enmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMAL
11、ISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3844-3:2011: EBS EN 3844-3:2011EN 3844-3:2011 (E) 2 Contents Foreword . 31 Scope . 42
12、Normative references . 43 Terms and definitions . 44 Principle of method 55 Designation . 56 Test apparatus 57 Test specimens . 68 Conditioning 69 Burner adjustment 610 Test procedure 611 Report. 7Bibliography . 14BS EN 3844-3:2011EN 3844-3:2011 (E) 3 Foreword This document (EN 3844-3:2011) has been
13、 prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member c
14、ountries of ASD, prior to its presentation to CEN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by May 2012, and conflicting national standards shall be withdrawn at the latest by May 2012. Attent
15、ion is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of t
16、he following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romani
17、a, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 3844-3:2011EN 3844-3:2011 (E) 4 1 Scope This European Standard specifies the test for the determination of the resistance of non metallic materials to flame and glow propagation and to flame penetration. This test method
18、 is also used for testing non metallic materials which have to meet the test criteria for the 45 Bunsen burner test. It is used for evaluation of non metallic materials or constructions used in the interiors of aerospace vehicles but may be used in other applications as specified in applicable procu
19、rement and regulatory documents. This standard should be used to measure and describe the properties of non metallic materials, products or assemblies in response to heat and flame under controlled laboratory conditions and should not be used to describe or appraise the fire hazard or fire risk of m
20、aterials, products, or assemblies under actual fire conditions. However, results of this test may be used as elements of a fire risk assessment which takes into account all of the factors which are pertinent to an assessment of the fire hazard of a particular end use. 2 Normative references The foll
21、owing referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ASTM-D 5025, A laboratory burner used for small-scale bur
22、ning test on plastic materials 1) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 time of flame application length of time the burner flame is applied to the specimen 3.2 after flame time time in seconds for which the specimen continues to fl
23、ame after the burner flame has been removed from the specimen 3.3 after glow time length of time in seconds for which the specimen continues to glow, without flaming combustion, after any flaming combustion ceases following the removal of flame application 3.4 flame penetration flame penetration occ
24、urs if the Bunsen burner flame penetrates (passes through) the test specimen during the time of flame application NOTE Flame penetration is defined to have occurred if the burner flame passes through a hole or crack in the specimen that forms during the test. 1) Published by: ASTM National (US) Amer
25、ican Society for Testing and Materials (http:/www.astm.org/). BS EN 3844-3:2011EN 3844-3:2011 (E) 5 4 Principle of method Testing is performed on a specimen that is held at an angle of 45 to the horizontal plane. A burner flame, having defined parameters, is applied to the specimen for a defined per
26、iod of time. The after flame time, after removal of the burner flame, and the after glow time is measured. Flame penetration is reported. 5 Designation EXAMPLE Description block 45 BUNSEN BURNER TEST Identity blockEN3844-3 Number of this standard 6 Test apparatus 6.1 Test cabinet Tests shall be cond
27、ucted in a draught-free cabinet, as shown in Figure 1. Details and dimensions of the test cabinet are given in Figure 2. 1 mm thick metal sheet shall be used for the bottom surface of the cabinet. It is recommended to paint the entire inside back walls of the cabinet mat black to facilitate the view
28、ing of the test specimen. A mirror may be located on the inside back surface to facilitate observation of the hidden surface. It is suggested that the cabinet be located inside an exhaust hood to facilitate clearing the cabinet of smoke and fumes after each test. Cabinets of bigger dimensions may be
29、 used if it has been proven that similar results are obtained. 6.2 Specimen holder A specimen holder shall be provided, such that the exposed area of the specimen is 203 mm 203 mm. The specimen holder shall be fabricated of corrosion-resistant metal. Each of the rectangular frames shall be at least
30、2 mm in thickness. An example for a construction is given in Figure 3. 6.3 Burner 6.3.1 Burner type The burner shall be a Bunsen or Tirril type, have a 9,5 mm inside diameter barrel, and shall be equipped with a needle valve to adjust the gas flow rate and thereby adjust the flame height. The burner
31、 shall have no air supplied either directly or by aspiration. The Bunsen burner defined in ASTM-D 5025 has been found acceptable. BS EN 3844-3:2011EN 3844-3:2011 (E) 6 6.3.2 Burner fuel Bottled methane gas shall be used as burner fuel. Natural gas is also acceptable if it contains more than 90 % met
32、hane. 6.3.3 Plumbing for gas supply The necessary gas connections and the applicable plumbing shall be essentially as specified in Figure 4. A control valve system with a delivery rate designed to furnish gas to the burner under a pressure of at least 5 kPa at the burner inlet shall be installed bet
33、ween the gas supply and the burner. 6.3.4 Flame height indicator There shall be a flame height indicator spaced 25 mm from the burner barrel and extending above the burner, as shown in Figure 5. The indicator shall have two prongs, 8 mm in length, marking the distances, 22 mm and 38 mm above the top
34、 of the burner. When the flame is properly adjusted, then the tip of the flame shall be at the 38 mm prong and for pure methane the tip of the inner cone of the flame will be at the 22 mm prong. The flame height indicator shall be removable. 6.4 Timer One or more stop-watches or other timers, calibr
35、ated and graduated to the nearest 0,1 s, shall be used to measure the time of the flame application and the after flame and after glow time. 7 Test specimens 7.1 Number of specimens At least three specimens shall be prepared and tested. 7.2 Specimens size The specimen shall be a square of at least 2
36、20 mm 220 mm. 8 Conditioning Condition specimens at (23 2) C and at (50 5) % relative humidity for min. 24 h. Remove only one specimen at a time from the conditioning environment immediately before being tested. 9 Burner adjustment Assure that the air supply to the burner is shut off. Open the stopc
37、ock in the gas line fully. Light the burner. Adjust the gas flowrate to produce a flame height of 38 mm. 10 Test procedure Make sure that the test cabinet is essentially draught free. Assure that the specimen is mounted in the frame, so that the edges are held securely. The exposed surface of the sp
38、ecimen, defined in the test specification shall be faced down. BS EN 3844-3:2011EN 3844-3:2011 (E) 7 Place the burner at least 76 mm away from where the specimen will be located during the test. Insert the specimen into the test position. Close the cabinet door, and keep it closed during the test. P
39、lace the burner, so that the centre of the burner barrel is under and 25 mm away from the centre of the exposed surface of the specimen, see Figure 6. Start the timer as soon as the burner is in test position. Apply the flame for 30 s, then withdraw the burner by moving the burner into start positio
40、n. Determine the after flame time and the after glow time for the specimen to the nearest 1 s. Determine whether flame penetration occurred. After both flaming and glowing have ceased: open the cabinet door slowly to clear the test cabinet of fumes and smoke; remove the specimen. Remove any material
41、 from the bottom of the cabinet that fell from the specimen. If necessary, clean the test cabinet window prior to testing the next specimen. 11 Report The test report shall include the following data: complete description of the specimen material and specimen construction (material designation, manu
42、facturers identification, manufacturing number, construction, specimen thickness, density, etc.); manufacturer/supplier and order number; statement of conformity given by the quality assurance of specimen manufacturer; designation of the test method; the after flame time for each specimen tested and
43、 the average value; the after glow time for each specimen tested to the nearest 1 s and the average value; a statement if flame penetration occurred; observations about melting, sagging, delamination, or other behaviour that affected the exposed surface area or mode of burning occurred, and the time
44、 in seconds at which such behaviour occurred; changes in test procedure required by the test specification; name and address of the test laboratory/organisation; date of testing; operators name and signature of the responsible engineer. BS EN 3844-3:2011EN 3844-3:2011 (E) 8 Figure 1 Draught-free cab
45、inet BS EN 3844-3:2011EN 3844-3:2011 (E) 9 Dimensions in millimetres Figure 2 Details and dimensions BS EN 3844-3:2011EN 3844-3:2011 (E) 10 Dimensions in millimetres Figure 3 Specimen holder BS EN 3844-3:2011EN 3844-3:2011 (E) 11 Key 1 flowmeter (optional) 4 needle valve 2 hose 5 pressure-gauge valv
46、e 3 burner Figure 4 Pluming of gas supply BS EN 3844-3:2011EN 3844-3:2011 (E) 12 Dimensions in millimetres Key 1 burner Figure 5 Flame height indicator BS EN 3844-3:2011EN 3844-3:2011 (E) 13 Dimensions in millimetres Key 1 specimen holder (top) 2 specimen 3 specimen holder (bottom) 4 burner orifice
47、Figure 6 Flame position the specimen BS EN 3844-3:2011EN 3844-3:2011 (E) 14 Bibliography For the preparation of this standard, the following documents were used: 1 FAR Part 25 Section 25.853, Federal Aviation Administration Part 25 - Airworthiness Standards: Transport Category Airplanes - Fire Prote
48、ction Sec 25.853 Compartment interiors 2 FAR Part 25 Appendix F Part 1 Paragraph (a) (2) (3) and (6), Federal Aviation Administration - Appendix F to Part 25. Part 1: Test criteria and procedures for showing compliance with 25.853 or 25.855 (a) Material test criteria. 2) Cargo and baggage compartmen
49、t not occupied by crew or passengers (III) 3) Vertical test 6) Forty-five degree test This page deliberately left blankBSI is the independent national body responsible for preparing British Standardsand other standards-related publications, information and services. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter.British Standards Institution (BSI)raising standards worldwideBS
