Aerospace series - Burning behaviour of non metallic materials under the influence of radiating heat and flames - Determination of gas components in the smoke

This standard defines a test method to determine the concentration of certain gas components due to pyrolitic decomposition of solid materials and composite materials under the influence of radiant heat only or with simultaneous flame application.
NOTE 1   The gas components in the smoke are determined according to the specific environmental and test conditions defined in EN 2824 and this standard. No studies have been made up to now to determine whether the results can be transferred to different 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.
NOTE 2   The burning behaviour - and consequently the gas components in the smoke - of aerospace materials are not only influenced by the type of material but also to a large extent by the configuration, the specific surface and mass, the combination with other materials, the means of joining as well as the processing technique.
NOTE 3   These influences should be taken into account in the preparation of tests, the selection of test specimens and the interpretation of test results.

Luft- und Raumfahrt - Brandverhalten nicht metallicher Werkstoffe unter Einwirkung von strahlender Wärme und Flammen - Bestimmung von Rauchgaskomponenten

Diese Norm legt ein Prüfverfahren zur Bestimmung der Konzentration gewisser Gasanteile durch pyrolytische Zersetzung von Feststoffen und Verbundmaterialien unter der Einwirkung von Wärmestrahlung allein oder bei gleichzeitiger Flammeinwirkung fest.
ANMERKUNG 1   Die Rauchgaskomponenten werden entsprechend den in EN 2824 und dieser Norm festgelegten, spezifischen Umgebungs- und Prüfbedingungen bestimmt. Bisher liegen keine Untersuchungen dazu vor, ob sich die Ergebnisse auf andere Bedingungen übertragen lassen, insbesondere auf den tatsächlichen Brandfall. Das toxische Risiko bei Inhalation oder die Reizwirkung können nicht allein durch Messung der Konzentration einzelner Rauchgaskomponenten bestimmt werden.
ANMERKUNG 2   Das Brandverhalten und folglich die Rauchgaskomponenten von Werkstoffen in der Luft- und Raumfahrt werden nicht allein durch den Werkstofftyp bestimmt, sondern in hohem Maße auch durch die Konfiguration, die spezifische Oberfläche und Masse, die Kombination mit anderen Werkstoffen, das Fügeverfahren sowie die Verarbeitungsmethode.
ANMERKUNG 3   Diese Einflüsse müssen bei der Vorbereitung der Prüfungen, der Auswahl der Prüflinge und der Interpretation der Prüfergebnisse in Betracht gezogen werden.

Série aérospatiale - Comportement au feu des matériaux non métalliques sous l'action de chaleur rayonnante et de flammes - Détermination des composants de gaz de fumée

Aeronavtika - Gorljivost nekovinskih materialov zaradi žarčenja toplote in plamena - Ugotavljanje sestave dima

Ta evropski standard opredeljuje preskusno metodo za ugotavljanje sestave dima zaradi pirolitske razgradnje trdnih materialov in kompozitnih materialov samo pod vplivom žarčenja toplote ali s hkratno uporabo ognja.

General Information

Status
Published
Publication Date
09-Oct-2011
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
21-Sep-2011
Due Date
26-Nov-2011
Completion Date
10-Oct-2011

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SLOVENSKI STANDARD
SIST EN 2826:2011
01-november-2011

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Aerospace series - Burning behaviour of non metallic materials under the influence of

radiating heat and flames - Determination of gas components in the smoke

Luft- und Raumfahrt - Brandverhalten nicht metallicher Werkstoffe unter Einwirkung von

strahlender Wärme und Flammen - Bestimmung von Rauchgaskomponenten

Série aérospatiale - Comportement au feu des matériaux non métalliques sous l'action

de chaleur rayonnante et de flammes - Détermination des composants de gaz de fumée

Ta slovenski standard je istoveten z: EN 2826:2011
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
SIST EN 2826:2011 en,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 2826:2011
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SIST EN 2826:2011
EUROPEAN STANDARD
EN 2826
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 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 gas components in the smoke

Série aérospatiale - Comportement au feu des matériaux Luft- und Raumfahrt - Brandverhalten nicht metallicher

non métalliques sous l'action de chaleur rayonnante et de Werkstoffe unter Einwirkung von strahlender Wärme und

flammes - Détermination des composants de gaz de fumée Flammen - Bestimmung von Rauchgaskomponenten

This European Standard was approved by CEN on 17 December 2010.

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 2826:2011: E

worldwide for CEN national Members.
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SIST EN 2826:2011
EN 2826:2011 (E)
Contents Page

Foreword ..............................................................................................................................................................3

1 Scope ......................................................................................................................................................4

2 Normative references ............................................................................................................................4

3 Short description of the test method ...................................................................................................4

4 Terms and definitions ...........................................................................................................................5

5 Designation ............................................................................................................................................5

6 Test equipment ......................................................................................................................................5

7 Specimens ..............................................................................................................................................5

7.1 Number of specimens ...........................................................................................................................5

7.2 Conditioning ...........................................................................................................................................5

7.3 Dimensions and shape of specimens .................................................................................................5

7.4 Specimen mounting...............................................................................................................................5

8 Procedure ...............................................................................................................................................5

9 Gas sampling and analysis ...................................................................................................................6

9.1 General ....................................................................................................................................................6

9.2 Sampling by means of plastic bags .....................................................................................................6

9.3 Alternative sampling methods .............................................................................................................6

9.4 Direct sampling using a dosing pump.................................................................................................6

9.5 Handling of colorimetric tubes .............................................................................................................6

9.6 Determination of halogens ...................................................................................................................7

9.6.1 Hydrogen chloride (using colorimetric tubes) ....................................................................................7

9.6.2 Hydrogen fluoride and hydrogen chloride (potentiometric measurement; wet analysis) .............7

9.7 Determination of other gases ...............................................................................................................8

9.8 After the test ...........................................................................................................................................8

9.9 Sources of errors ...................................................................................................................................8

10 Test report ..............................................................................................................................................8

Annex A (normative) Example for a test report on the determination of gas components in the

smoke ......................................................................................................................................................9

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SIST EN 2826:2011
EN 2826:2011 (E)
Foreword

This document (EN 2826:2011) 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 August 2011, and conflicting national standards shall be withdrawn at

the latest by August 2011.

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.
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SIST EN 2826:2011
EN 2826:2011 (E)
1 Scope

This European Standard defines a test method to determine the concentration of certain gas components due

to pyrolitic decomposition of solid materials and composite materials under the influence of radiant heat only

or with simultaneous flame application.

NOTE 1 The gas components in the smoke are determined according to the specific environmental and test conditions

defined in EN 2824 and this standard. No studies have been made up to now to determine whether the results can be

transferred to different 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.

NOTE 2 The burning behaviour and consequently the gas components in the smoke of aerospace materials are not

only influenced by the type of material but also to a large extent by the configuration, the specific surface and mass, the

combination with other materials, the means of joining as well as the processing technique.

NOTE 3 These influences shall be taken into account in the preparation of tests, the selection of test specimens and

the interpretation of test results.
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 2824, 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

EN 2825, Aerospace series — Burning behaviour of non metallic materials under the influence of radiating

heat and flames — Determination of smoke density
EN ISO 13943:2008, Fire safety — Vocabulary (ISO 13943:2008)
3 Short description of the test method
3.1 General

The specimens are vertically arranged in a closed test chamber according to EN 2824 and subjected to

decomposition by radiant heat with or without flame application. During the test, gas samples are taken at

specified intervals from the generated decomposition products to determine the concentration of selected

components.

The methods described in 3.2 and 3.4 are used to determine the gas components in the smoke.

3.2 The hydrogen chloride (HCl) taken from the test chamber can be indicated directly during the test using

colorimetric tubes or analyzed by wet analysis.
3.3 Hydrogen fluoride (HF) is measured by wet analysis.

3.4 For determination of other gases, the fumes are collected in a plastic bag with a high gas-isolation

value; they can be measured consecutively using colorimetric tubes.

1) Published as ASD-STAN Prestandard at the date of publication of this standard by Aerospace and Defence Industries

Association of Europe-Standardization (ASD-STAN), (www.asd-stan.org).
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SIST EN 2826:2011
EN 2826:2011 (E)
4 Terms and definitions

For the purposes of this document, the terms and definitions given in EN ISO 13943 apply.

5 Designation
EXAMPLE
Description block Identity block
TEST EN2826A
Number of this standard
Code letter of test method (see below)

A = indicates that the method is used to test a material in the Flaming mode only.

B = indicates that the method is used to test a material in both the Flaming mode

and the Norm-Flaming mode.
6 Test equipment
Testing shall be carried out in a test chamber according to EN 2824.
7 Specimens
7.1 Number of specimens
According to EN 2824.
7.2 Conditioning
According to EN 2824.
7.3 Dimensions and shape of specimens
According to EN 2824.
7.4 Specimen mounting
According to EN 2824.
8 Procedure

The specimens conditioned according to EN 2824 are tested in line with the requirements of EN 2825, Clause

8; gas samples are taken according to Clauses 8 and 10. Testing may be carried out concurrently to the

determination of the smoke density according to EN 2825. When the specimens are being examined for gas

components in the smoke only, the requirements specified for the adjustment of the optical system are not

applicable.
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SIST EN 2826:2011
EN 2826:2011 (E)
9 Gas sampling and analysis
9.1 General
The gas-sampling test set-up shall conform to EN 2824, Figure 9.

Unless otherwise specified, gas sampling shall be started at 4 min. If gas samples are taken during the

measurement of smoke, the smoke measurement values may be affected.

The point of time indicated for the measurement means the beginning of the measurement, i. e. of the gas

sampling. If the sampling period exceeds 40 s, this shall be noted separately in the test report.

9.2 Sampling by means of plastic bags

The sampling by means of plastic bags shall be carried out according to EN 2824, Figure 9.

Before starting the test, the sampling bag shall be evacuated.

The bag is introduced into the vacuum chamber and then connected to the quick release coupling on the

cover. The shut-off valve on the bag is opened and the tubing between test chamber and plastic sampling bag

is evacuated. Then the vacuum chamber is evacuated to a pressure of 500 hPa.

The sample is introduced into the test chamber and tested according to EN 2825. The chamber shut-off valve

and the valve of the vacuum chamber are opened at the time required for starting the gas measurement. After

filling of the bag, both supply line valves shall be closed. The vacuum chamber shall be ventilated by means of

2) 2)

valve 2 . The shut-off valve 4 near the gas bag is closed, the bag is closed and disconnected from the

cover. The measuring of the gases contained in the plastic bag shall be carried out within 5 h. The

...

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