SIST EN 2826:2011
(Main)Aerospace series - Burning behaviour of non metallic materials under the influence of radiating heat and flames - Determination of gas components in the smoke
- Abstract
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.
- Status
- Published
- Publication Date
- 09-Oct-2011
- Technical Committee
- I13 - Imaginarni 13
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 21-Sep-2011
- Due Date
- 26-Nov-2011
- Completion Date
- 10-Oct-2011
EN 2826:2011 is a European Standard published by CEN for the aerospace series. It specifies a test method for measuring the concentration of selected gas components in smoke from non-metallic solid and composite materials when they decompose under radiant heat, with or without flame application.
What does SIST EN 2826:2011 specify?
SIST EN 2826:2011 specifies a laboratory test method for determining certain gas components produced by pyrolytic decomposition of aerospace materials. The method is intended for non-metallic solid materials and composite materials exposed to radiant heat only or radiant heat with simultaneous flame application.
The document is built around the test chamber and media defined in EN 2824, the smoke-density method in EN 2825, and the vocabulary in EN ISO 13943:2008. Annex A gives an example test report.
| Annex | What it covers |
|---|---|
| Annex A | Example of a test report for determining gas components in smoke |
What are the key requirements of SIST EN 2826:2011?
SIST EN 2826:2011 requires the specimens to be tested vertically in a closed chamber that conforms to EN 2824. In practice, this means the gas measurements are tied to a fixed test arrangement, so the chamber setup must be controlled if results are to be comparable.
Clause 3 describes the overall method: the material is decomposed by radiant heat, with or without flame, and gas samples are taken at specified times from the decomposition products. The standard makes clear that the gas analysis is part of the same fire exposure system used for smoke testing.
Gas sampling and analysis
- HCl can be measured directly during the test with colorimetric tubes, or by wet analysis.
- HF is measured by wet analysis.
- Other gases are collected in a high gas-isolation plastic bag and then measured with colorimetric tubes.
This matters because the laboratory has to choose the right sampling path for each gas, instead of using one universal measurement method.
Clause 9 sets practical sampling rules. Sampling normally starts at 4 min, and if a sampling period lasts more than 40 s, that has to be noted in the report. The standard also warns that sampling during smoke measurement can affect the smoke reading.
For halogens, Clause 9.6 gives specific measurement approaches. HCl can be measured with a colorimetric tube and pump directly from the chamber, while HF and HCl can also be determined potentiometrically after wet absorption. The procedure uses a calibration curve, so the lab has to control the electrode calibration and the chemical conditions of the solution.
Clause 9.9 highlights likely error sources. The manufacturer’s instructions for the tubes, including cross-sensitivities and temperature limits, must be followed, and cleaning agents for chamber walls can influence gas measurement accuracy. In practice, this means cleaning and handling choices can affect the result as much as the test itself.
Clause 5 gives the designation format. The code letters identify whether the test is run in Flaming mode only or in both Flaming mode and Norm-Flaming mode. That helps users specify the exact test condition on reports and purchase or qualification documents.
Clause 10 requires a detailed test report. It covers specimen identification, conditioning, test conditions, number of tests, analytical method, measured gas-component values in ppm, observations, date, and signature.
What terms does SIST EN 2826:2011 define?
Hydrogen chloride (HCl) - a halogen gas component in the smoke that the standard measures by colorimetric tube or wet analysis.
Hydrogen fluoride (HF) - another halogen gas component, measured by wet analysis.
Colorimetric tubes - disposable measuring tubes used with a gas pump to indicate the presence or concentration of a gas.
Wet analysis - a chemical measurement method used after the combustion gases are absorbed into a liquid.
Specimen conditioning - the pre-test conditioning of the sample material before exposure in the chamber.
Flaming mode - the test condition identified by code letter A for testing with flame application.
Norm-Flaming mode - the test condition identified by code letter B for testing in both Flaming mode and Norm-Flaming mode.
Who uses SIST EN 2826:2011?
SIST EN 2826:2011 is used by aerospace material suppliers, test laboratories, quality teams, and purchasers who need to assess the smoke gas components of non-metallic materials. It is relevant where material qualification, comparative testing, or supplier control depends on controlled fire exposure and gas analysis. It also supports engineers who specify test conditions and report results for aerospace construction materials.
Which standards are used with SIST EN 2826:2011?
EN 2824 provides the test equipment, chamber arrangement, gas-sampling setup, and the environmental and test conditions used with this method.
EN 2825 provides the smoke-density test procedure that this standard uses alongside gas sampling.
EN ISO 13943:2008 provides the fire-safety vocabulary used for the terms and definitions.
What does the SIST EN 2826:2011 document contain?
The document contains a short method overview, a defined designation system, equipment and specimen requirements, and detailed gas-sampling and analysis procedures. It includes separate instructions for plastic-bag sampling, direct sampling with a dosing pump, handling of colorimetric tubes, and potentiometric measurement after wet absorption.
It also includes a calculation approach for HF or HCl concentration, plus notes on likely interference from other substances and practical sources of error. Annex A provides a filled-out style test report form with fields for specimen details, test conditions, measured values, mean values, observations, and sign-off.
Relations
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
SIST EN 2826:2011 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "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 covers: 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.
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.
SIST EN 2826:2011 is classified under the following ICS (International Classification for Standards) categories: 13.220.40 - Ignitability and burning behaviour of materials and products; 49.025.01 - Materials for aerospace construction in general. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 2826:2011 has the following relationships with other standards: It is inter standard links to SIST EN 2825:2011, SIST EN ISO 13943:2011, SIST EN 2665-001:2024, SIST EN 4717:2022, SIST EN 4056-006:2014, SIST EN 4718:2022, SIST EN 6049-009:2025, SIST EN 6049-008:2014, SIST EN 4056-001:2015, SIST EN 2996-001:2009, SIST EN 4674-004:2018, SIST EN 4710-01:2019, SIST EN 2995-001:2024, SIST EN 4839-001:2018, SIST EN 4056-004:2015. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 2826:2011 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2011
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8JRWDYOMDQMHVHVWDYHGLPD
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
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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.
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
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.
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
1)
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).
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.
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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