SIST EN 3844-2:2019

Aerospace series - Flammability of non metallic materials - Part 2: Small burner test, horizontal - Determination of the horizontal flame propagation

This document specifies the test method for the determination of the horizontal flame propagation of non-metallic materials when subjected to a small flame in part or in whole.
This test method is also used for testing non-metallic materials which have to meet the test criteria for the horizontal Bunsen burner test.
It is used for evaluation of non-metallic materials or constructions used in the interiors of aerospace vehicles but also may be used in other applications as specified in applicable procurement 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 materials, 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.

Luft- und Raumfahrt - Entflammbarkeit nichtmetallischer Werkstoffe - Teil 2: Kleinbrenner-Prüfung, waagerecht - Bestimmung der waagerechten Flammenausbreitung

Dieses Dokument legt das Prüfverfahren zur Bestimmung der waagerechten Flammenausbreitung bei nichtmetallischen Werkstoffen fest, wenn diese einer kleinen Flamme, im Ganzen oder teilweise, ausgesetzt werden.
Dieses Prüfverfahren wird ebenfalls zur Prüfung nichtmetallischer Werkstoffe verwendet, die die Prüfkriterien für die Bunsenbrennerprüfung (waagerecht) erfüllen müssen.
Es wird zur Bewertung nichtmetallischer Werkstoffe oder Konstruktionen verwendet, die im Inneren von Luft- und Raumfahrzeugen verwendet werden, aber auch in anderen Anwendungen verwendet werden können, wie in geltenden Dokumenten zu Auftragsvergabe und Rechtsvorschriften festgelegt.
Diese Norm sollte zur Messung und Beschreibung der Eigenschaften nichtmetallischer Werkstoffe, Erzeugnisse oder Baugruppen angewendet werden, die unter kontrollierten Laborbedingungen Wärme und Beflammung ausgesetzt sind; sie sollte nicht für die Beschreibung oder Bewertung der Brandgefahr oder des Brandrisikos von Werkstoffen, Erzeugnissen oder Baugruppen bei realen Brandsituationen angewendet werden. Die Prüfergebnisse dürfen jedoch als Elemente einer Bewertung des Brandrisikos verwendet werden, die alle Faktoren berücksichtigt, die eine Bewertung der Brandgefahr einer bestimmten Endanwendung nachhaltig beeinflussen.

Série aérospatiale - Inflammabilité des matériaux non métalliques - Partie 2 : Essai au brûleur, horizontal - Détermination de la propagation horizontale de la flamme

Le présent document spécifie la méthode d’essai pour la détermination de la propagation horizontale de la flamme de tout ou partie des matériaux non métalliques lorsqu’ils sont soumis à une petite flamme.
Cette méthode d’essai est aussi utilisée pour tester les matériaux non métalliques qui doivent satisfaire aux critères d’essai relatifs à l’essai au brûleur de Bunsen, horizontal.
Elle est utilisée pour évaluer les matériaux et les constructions non métalliques utilisés à l’intérieur des véhicules aérospatiaux mais elle peut aussi être utilisée dans d’autres applications comme spécifié dans les documents d’approvisionnement et réglementaires applicables.
Il convient d’utiliser la présente norme pour mesurer et décrire les propriétés des matériaux, produits ou ensembles non métalliques en réponse à la chaleur et à la flamme dans des conditions contrôlées de laboratoire et non pas pour décrire ou évaluer les dangers ou les risques d’incendie des matériaux, produits ou ensembles dans des conditions réelles d'incendie. Toutefois, les résultats de cet essai peuvent être utilisés en tant qu’éléments d’évaluation des risques d’incendie qui tiennent compte de tous les facteurs pertinents pour faire une évaluation des dangers d’incendie liés à une utilisation finale particulière.

Aeronavtika - Vnetljivost nekovinskih materialov - 2. del: Preskus majhnih gorilnikov, vodoravni - Ugotavljanje vodoravnega širjenja ognja

Ta dokument določa preskusno metodo za ugotavljanje vodoravnega širjenja ognja nekovinskih materialov, ki so deloma ali v celoti izpostavljeni majhnemu ognju. Ta preskusna metoda se uporablja tudi za preskušanje nekovinskih materialov, ki morajo ustrezati preskusnim merilom za vodoravni preskus Bunsenovih gorilnikov. Uporablja se za vrednotenje nekovinskih materialov ali konstrukcij, ki se uporabljajo v notranjosti aeronavtičnih plovil, uporaba pa je mogoča tudi na drugih področjih uporabe, kot je določeno v veljavnih dokumentih za dobavo in v zakonskih dokumentih. Ta standard se predvidoma uporablja za merjenje in opis lastnosti nekovinskih materialov, proizvodov ali sklopov v odzivu na toploto in ogenj v nadzorovanih laboratorijskih pogojih in se ne uporablja za opis ali oceno požarne nevarnosti ali požarnega tveganja materialov, proizvodov ali sklopov v dejanskih požarnih razmerah. Kljub temu je mogoče rezultate tega preskusa uporabiti kot elemente ocene požarnega tveganja, ki upošteva vse dejavnike, ki se navezujejo na oceno nevarnosti posamezne končne uporabe.

General Information

• Status: Published
• Publication Date: 10-Sep-2019
• ICS: 13.220.40 - Ignitability and burning behaviour of materials and products
• ICS: 49.025.15 - Non-ferrous alloys in general
• Technical Committee: I13 - Imaginarni 13
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 06-Sep-2019
• Due Date: 11-Nov-2019
• Completion Date: 11-Sep-2019
• Ref Project: EN 3844-2:2019 - Aerospace series - Flammability of non-metallic materials - Part 2: Small burner test, horizontal - Determination of the horizontal flame propagation

Relations

• Replaces: SIST EN 3844-2:2012 - Aerospace series - Flammability of non metallic materials - Part 2: Small burner test, horizontal - Determination of the horizontal flame propagation
• Effective Date: 04-Sep-2019
• Revised: SIST EN 3844-2:2012 - Aerospace series - Flammability of non metallic materials - Part 2: Small burner test, horizontal - Determination of the horizontal flame propagation
• Effective Date: 08-Feb-2017

Overview

EN 3844-2:2019 - Aerospace series - Flammability of non-metallic materials - Part 2: Small burner test, horizontal - defines a laboratory test method to determine horizontal flame propagation of non‑metallic materials when exposed to a small flame. The standard is intended primarily for evaluating interior materials and constructions used in aerospace vehicles, and is also applicable where procurement or regulatory documents require the horizontal Bunsen burner test. Results describe material response to heat and flame under controlled conditions and can be used as part of a broader fire risk assessment (but not as a direct appraisal of actual fire hazard).

Key topics and technical requirements

• Test principle: A specimen mounted horizontally is exposed to a small burner flame for 15 s; the flame spread rate is calculated from measured burn length and time.
• Specimen requirements:
  • Minimum specimen area: 75 mm × 305 mm (or smaller if representative of in-service size).
  • Thickness: no greater than the minimum qualified for aircraft use (≤ 3 mm).
  • At least three specimens tested; anisotropic materials tested in both directions.
  • Conditioning: (23 ± 2) °C, (50 ± 5)% RH for minimum 24 h.
• Apparatus:
  • Draught‑free test cabinet with metal base and preferably matte‑black back for observation.
  • Corrosion‑resistant specimen holder exposing at least 50 mm × 305 mm.
  • Bunsen or Tirril burner (9.5 mm bore) with needle valve; no forced air supply.
  • Burner fuel: methane (natural gas acceptable if >90% methane).
  • Gas supply pressure: (17 ± 2) kPa at burner inlet.
  • Flame height indicator: prongs at 22 mm and 38 mm; flame temperature (Type K thermocouple) ≥ 843 °C when adjusted.
• Test geometry & timings:
  • Specimen lower edge 19 mm above burner top.
  • Record times when flame front crosses gauge lines at 38 mm and 292 mm.
  • Calculation: flame spread rate (mm/min) = (292 − 38) × 60 / (t292 − t38) when 292 mm is reached; if flame self‑extinguishes before 292 mm, record spread rate as 0.
• Documentation: test report must include apparatus, specimen data, conditioning, test results and observations.

Applications and users

EN 3844-2:2019 is used by:

• Aerospace OEMs and interior component manufacturers for material qualification.
• Test laboratories performing small burner or horizontal Bunsen tests.
• Material suppliers demonstrating compliance with procurement or regulatory flame‑spread criteria.
• Fire safety engineers and certification bodies incorporating lab data into fire risk assessments.

Keywords: EN 3844-2:2019, aerospace flammability, small burner test, horizontal flame propagation, horizontal Bunsen burner test, flame spread rate, non‑metallic materials.

Related standards

• ASTM D5025 - Specification for laboratory burners used in small‑scale burning tests (referenced for burner design).
• EN 3844-2:2019 supersedes EN 3844-2:2011; other parts of the EN 3844 aerospace flammability series cover related test methods.

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2019
Nadomešča:
SIST EN 3844-2:2012
Aeronavtika - Vnetljivost nekovinskih materialov - 2. del: Preskus majhnih
gorilnikov, vodoravni - Ugotavljanje vodoravnega širjenja ognja
Aerospace series - Flammability of non metallic materials - Part 2: Small burner test,
horizontal - Determination of the horizontal flame propagation
Luft- und Raumfahrt - Entflammbarkeit nichtmetallischer Werkstoffe - Teil 2:
Kleinbrenner-Prüfung, waagerecht - Bestimmung der waagerechten
Flammenausbreitung
Série aérospatiale - Inflammabilité des matériaux non métalliques - Partie 2 : Essai au
brûleur, horizontal - Détermination de la propagation horizontale de la flamme
Ta slovenski standard je istoveten z: EN 3844-2:2019
ICS:
13.220.40 Sposobnost vžiga in Ignitability and burning
obnašanje materialov in behaviour of materials and
proizvodov pri gorenju products
49.025.15 Neželezove zlitine na Non-ferrous alloys in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 3844-2
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2019
EUROPÄISCHE NORM
ICS 49.025.15 Supersedes EN 3844-2:2011
English Version
Aerospace series - Flammability of non-metallic materials -
Part 2: Small burner test, horizontal - Determination of the
horizontal flame propagation
Série aérospatiale - Inflammabilité des matériaux non Luft- und Raumfahrt - Entflammbarkeit
métalliques - Partie 2 : Essai au brûleur, horizontal - nichtmetallischer Werkstoffe - Teil 2: Kleinbrenner-
Détermination de la propagation horizontale de la Prüfung, waagerecht - Bestimmung der waagerechten
flamme Flammenausbreitung
This European Standard was approved by CEN on 12 May 2019.

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, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 3844-2:2019 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle of method . 5
5 Designation . 5
6 Test apparatus . 5
6.1 Test cabinet . 5
6.2 Specimen holder . 5
6.3 Burner . 6
6.3.1 Burner type . 6
6.3.2 Burner fuel . 6
6.3.3 Plumbing for gas supply . 6
6.3.4 Flame height indicator . 6
6.3.5 Flame temperature . 6
6.4 Timer . 6
6.5 Ruler . 6
7 Test specimens . 6
7.1 Number of specimens . 6
7.2 Specimens orientation . 7
7.3 Specimens size . 7
7.4 Specimens preparation . 7
8 Conditioning. 7
9 Burner adjustment . 7
10 Test procedure . 7
11 Calculation . 8
12 Test report . 8
Annex A (informative) Standard evolution form . 15
Bibliography . 16

European foreword
This document (EN 3844-2:2019) 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 February 2020, and conflicting national standards shall
be withdrawn at the latest by February 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 3844-2:2011.
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, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
1 Scope
This document specifies the test method for the determination of the horizontal flame propagation of
non-metallic materials when subjected to a small flame in part or in whole.
This test method is also used for testing non-metallic materials which have to meet the test criteria for
the horizontal Bunsen burner test.
It is used for evaluation of non-metallic materials or constructions used in the interiors of aerospace
vehicles but also may be used in other applications as specified in applicable procurement 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 materials, 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 following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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, Standard Specification for Laboratory Burner Used for Small-Scale Burning Tests on
1)
Plastic Materials
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
flame spread rate
d
...