EN 2824:2011

SLOVENSKI STANDARD
01-januar-2012
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Aerospace series - Burning behaviour of non-metallic materials under the influence of
radiating heat and flames - Determination of smoke density and gas components in the
smoke of materials - Test equipment apparatus and media
Luft- und Raumfahrt - Brandverhalten nicht metallischer Werkstoffe unter Einwirkung von
strahlender Wärme und Flammen - Bestimmung der Rauchdichte und der
Rauchgaskomponenten von Werkstoffen - Prüfeinrichtung Prüfgeräte und Prüfmittel
Série aérospatiale - Comportement au feu des matériaux non-métalliques sous l'action
de chaleur rayonnante et de flammes - Détermination de la densité de fumée et des
composants des gaz de fumée des matériaux - Équipement, appareils et moyens d'essai
Ta slovenski standard je istoveten z: EN 2824:2011
ICS:
13.220.40 Sposobnost vžiga in Ignitability and burning
obnašanje materialov in behaviour of materials and
proizvodov pri gorenju products
49.025.01 Materiali za letalsko in Materials for aerospace
vesoljsko gradnjo na splošno construction in general
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 2824
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2011
ICS 13.220.40; 49.025.99
English Version
Aerospace series - Burning behaviour of non-metallic materials
under the influence of radiating heat and flames - Determination
of smoke density and gas components in the smoke of materials
- Test equipment apparatus and media
Série aérospatiale - Comportement au feu des matériaux
Luft- und Raumfahrt - Brandverhalten nichtmetallischer
non-métalliques sous l'action de chaleur rayonnante et de Werkstoffe unter Einwirkung von strahlender Wärme und
flammes - Détermination de la densité de fumée et des Flammen - Bestimmung der Rauchdichte und der
composants des gaz de fumée des matériaux - Rauchgaskomponenten von Werkstoffen - Prüfeinrichtung
Équipement, appareils et moyens d'essai Prüfgeräte und Prüfmittel
This European Standard was approved by CEN on 12 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 without 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 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, Denmark, 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
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2011 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2824:2011: E
worldwide for CEN national Members.

Contents Page
Foreword .3
1 Scope .4
2 Normative references .4
3 Apparatus .4
3.1 General .4
3.2 Test chamber .5
3.3 Radiant heat furnace .5
3.4 Specimen holder .5
3.5 Photometric system .5
3.6 Radiometer .6
3.7 Thermocouple .6
3.8 Manometer for chamber pressure measurements .6
3.9 Burner .6
3.10 Gas sampling probes .6
3.11 Plastic bags for gas sampling .7
3.12 Vacuum chamber .7
3.13 Vacuum pump .7
3.14 Alternative gas sampling methods .7
3.15 Colorimetric tubes .7
3.16 Dosing pump .7
3.17 Ancillary equipment for wet analysis .7
4 Cleaning of the test chamber .8
5 Specimens .8
5.1 Number of specimens .8
5.2 Conditioning .8
5.3 Dimensions and shape of specimens .8
5.4 Specimen mounting.8

Foreword
This document (EN 2824:2011) has been 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 countries 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.
Attention 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 the 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, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
1 Scope
This European Standard defines the test equipment, apparatus and media required for determination of the
smoke density according to EN 2825 and the concentration of the gas components in the smoke according to
EN 2826 due to pyrolitic decomposition of solid materials and composite materials of up to 25 mm in thickness
under the influence of radiant heat only or with simultaneous flame application.
This test method 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 material concerned.
NOTE The smoke gas density and the gas components in the smoke are determined according to the specific
environmental and test conditions defined in this standard, in EN 2825 and EN 2826. No studies have been made up to
now to determine whether the results can be transferred to differing conditions, particularly to actual fire conditions. The
inhalatory toxical risk and irritancy affect cannot be assessed by merely measuring the concentration of individual gas
components in the smoke.
2 Normative references
The following 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.
EN 2743, Aerospace series — Fibre reinforced plastics — Standard procedures for conditioning prior to
testing unaged materials
EN 2825, Aerospace series — Burning behaviour of non metallic materials under the influence of radiating
heat and flames — Determination of smoke density
EN 2826, Aerospace series — Burning behaviour of non metallic materials under the influence of radiating
heat and flames — Determination of gas components in the smoke
ISO 2768-1, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual
tolerance indications
ISO 2768-2, General tolerances — Part 2: Geometrical tolerances for features without individual tolerance
indications
3 Apparatus
3.1 General
The test equipment comprises the test chamber described in 3.2, incorporating the devices specified in 3.3 to
3.9, as well as the ancillary equipment as detailed in 3.10 to 3.17.
3.2 Test chamber
See Figure 1.
The test chamber shall be designed to provide inside dimensions of (914 × 610 × 914) mm ± 3 mm for width,
depth, and height respectively. The interior surfaces shall consist of porcelain-enamelled metal or equivalent
coated metal resistant to chemical attack and corrosion, and suitable for cleaning. Panels of 10 mm thickness
of porcelain-enamelled steel (interior surface) laminated to a heat-resistant core and backed with corrosion-
resistant steel (exterior surface) have been found suitable. Sealed windows shall be provided to accomodate a
vertical photometric system. All other chamber penetrations shall also be sealed. When all openings are
closed, the chamber shall be capable of developing and maintaining positive pressure during the test period.
In order to avoid an excessive increase of pressure in the chamber during testing an airtight safety disc is
required, e. g. a sheet of aluminium foil of thickness not greater than 0,04 mm and a minimum area of 800 cm
shall be provided in an opening of the chamber floor.
3.3 Radiant heat furnace
See Figure 2.
The furnace shall be located according to Figure 3 equidistant from the front and back of the test chamber.
The furnace control system shall maintain the required irradiance level of (25,0 ± 0,5) kW/m on the specimen
surface for 20 min under steady-state conditions with the chamber door closed (to be demonstrated in
calibration). The control system shall consist of a variable transformer or an equivalent control device, and a
voltmeter or other means for monitoring the electrical input. Where line voltage fluctuations exceed ± 2,5 %, a
constant-voltage transformer is required to maintain the prescribed irradiance level.
3.4 Specimen holder
Stops have to be provided to center the specimen accurately in front of the furnace.
Figure 4 shows the construction of the holder. Two wires have to be placed in front of the specimen.
3.5 Photometric system
3.5.1 The photometric system shall conform to Figure 5. The light path shall be oriented vertically to reduce
influences resulting from stratification of the smoke generated by materials under test. The system shall
conform to 3.5.2 to 3.5.4.
3.5.2 The light source shall be a 6 V incandescent lamp, operated at a fixed voltage to provide a brightness
temperature of (2 200 ± 100) K. The light source shall be located in a sealed and light-tight box. This box shall
contain the necessary optics to provide a collimated light beam of about 50 mm diameter passing vertically
through the chamber.
-9
3.5.3 A photomultiplier with a spectral sensitivity rating of S-4 and a dark current of less than 10 A shall be
used. For amplification, a multirange amplifier shall be used, suitable to measure continuously the relative light
intensity in percentage transmission over at least five orders of magnitude. The system shall have a linear
response with respect to transmittance and an accuracy
...