EN 1839:2017

Determination of the explosion limits and the limiting oxygen concentration(LOC) for flammable gases and vapours

This European Standard specifies two test methods (method T and method B) to determine the explosion limits of gases, vapours and their mixtures, mixed with air. An air/inert gas mixture (volume fraction of the oxygen < 21 %) can be used as the oxidizer instead of air. In this European Standard, the term "air" includes such air/inert mixtures. This European Standard applies to gases, vapours and their mixtures at atmospheric pressure for temperatures up to 200 °C.
This European Standard specifies in addition the method for determining the LOC of mixtures consisting of flammable gas or vapour, air and inert gas at atmospheric pressure and temperatures from ambient temperature to 200 °C.
NOTE: This method was previously specified in EN 14756.

Bestimmung der Explosionsgrenzen von Gasen und Dämpfen und Bestimmung der Sauerstoffgrenzkonzentration (SGK) für brennbare Gase und Dämpfe

Diese Europäische Norm legt zwei Prüfverfahren (Verfahren T und Verfahren B) zum Bestimmen der Explosionsgrenzen von Gasen, Dämpfen und deren Gemischen, in Mischung mit Luft oder einer Luft-/Inertgas-Mischung (Volumenanteil Sauerstoff < 21 %), fest. Dieses Dokument gilt für Gase, Dämpfe und deren Gemische bei Umgebungsdruck und Temperaturen von Raumtemperatur bis 200 °C.

Détermination des limites d’explosivité des gaz et vapeurs et détermination de la concentration limite en oxygène (CLO) des gaz et des vapeurs inflammables

La présente Norme européenne spécifie deux méthodes d'essai (la méthode T et la méthode B) pour déterminer les limites d'explosivité de gaz, de vapeurs et de mélanges de gaz et de vapeurs mélangés à l'air, ou d'un mélange d'air et de gaz inerte (fraction volumique de l'oxygène < 21 %) ainsi que la concentration limite en oxygène. La présente Norme européenne s’applique aux gaz, aux vapeurs et à leurs mélanges à la pression atmosphérique pour des températures jusqu’à 200 °C.

Ugotavljanje mej eksplozivnosti plinov in hlapov ter ugotavljanje mejne koncentracije kisika (LOC) za vnetljive pline in pare

Ta evropski standard določa dve preskusni metodi (metodo T in metodo B) za ugotavljanje mej eksplozivnosti plinov, hlapov in njihovih mešanic, zmešanih z zrakom. Namesto zraka je kot oksidant mogoče uporabiti mešanico zraka in inertnega plina (delež prostornine kisika < 21 %). Izraz »zrak« v tem evropskem standardu vključuje take mešanice zraka/inertnega plina. Ta evropski standard se uporablja za pline, hlape in njihove mešanice pri atmosferskem tlaku in temperaturah do 200 °C. Ta evropski standard določa tudi metodo za ugotavljanje mejne koncentracije kisika pri mešanicah vnetljivih plinov ali hlapov, zraka in inertnega plina pri atmosferskem tlaku in temperaturah od temperature okolja do 200 °C.  OPOMBA: Ta metoda je bila predhodno določena v standardu EN 14756.

General Information

• Status: Published
• Publication Date: 10-Jan-2017
• Withdrawal Date: 10-Jan-2018
• ICS: 13.230 - Explosion protection
• Technical Committee: CEN/TC 305 - Potentially explosive atmospheres - Explosion prevention and protection
• Drafting Committee: CEN/TC 305/WG 1 - Test methods for determining the flammability characteristics of substances (provisional title)
• Directive: 2014/34/EU - Directive 2014/34/EU Of The European Parliament And Of The Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to equipment and protective systems intended for use in potentially explosive atmospheres (recast)
• Directive: 94/9/EC - Directive 94/9/EC of the European Parliament and the Council of 23 March 1994 on the approximation of the laws of the Member States concerning equipment and protective systems intended for use in potentially explosive atmospheres
• Mandate: M/BC/CEN/92/46 - Standardization mandate assigned to CEN/CENELEC concerning equipment and protective systems intended for use in potentially explosive atmospheres
• Ref Project: SIST EN 1839:2017 - Determination of explosion limits of gases and vapours and determination of the limiting oxygen concentration (LOC) for flammable gases and vapours

Relations

• Replaces: EN 1839:2012 - Determination of explosion limits of gases and vapours
• Effective Date: 08-Jun-2022
• Replaces: EN 14756:2006 - Determination of the limiting oxygen concentration (LOC) for flammable gases and vapours
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2017
1DGRPHãþD
SIST EN 14756:2007
SIST EN 1839:2013
Ugotavljanje mej eksplozivnosti plinov in hlapov ter ugotavljanje mejne
koncentracije kisika (LOC) za vnetljive pline in pare
Determination of explosion limits of gases and vapours and determination of the limiting
oxygen concentration (LOC) for flammable gases and vapours
Bestimmung der Explosionsgrenzen von Gasen und Dämpfen und Bestimmung der
Sauerstoffgrenzkonzentration (SGK) für brennbare Gase und Dämpfe
Détermination des limites d'exposivité des gaz et vapeurs et détermination de la
concentration limite en oxygène (CLO) des gaz et des vapeurs inflammable
Ta slovenski standard je istoveten z: EN 1839:2017
ICS:
13.230 Varstvo pred eksplozijo Explosion protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 1839
EUROPEAN STANDARD
NORME EUROPÉENNE
January 2017
EUROPÄISCHE NORM
ICS 13.230 Supersedes EN 14756:2006, EN 1839:2012
English Version
Determination of the explosion limits and the limiting
oxygen concentration(LOC) for flammable gases and
vapours
Détermination des limites d'explosivité des gaz et Bestimmung der Explosionsgrenzen und der
vapeurs et détermination de la concentration limite en Sauerstoffgrenzkonzentration (SGK) für brennbare
oxygène (CLO) des gaz et des vapeurs inflammables Gase und Dämpfen
This European Standard was approved by CEN on 7 November 2016.

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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 1839:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 5
Introduction . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Test methods . 9
4.1 General . 9
4.2 Method T (“tube” method) . 10
4.2.1 Detailed method . 10
4.2.2 Reagents and materials . 10
4.2.3 Apparatus . 11
Table 1 — Maximum permissible uncertainty of measurement for the amount of test
substance in the test mixture . 12
Figure 1 — Scheme of the ‘tube’ apparatus for determining the explosion limits respc.
Limiting oxygen concentration . 12
4.2.4 Preparation of the test mixture . 13
4.2.5 Procedure. 13
4.3 Method B (“bomb” method). 14
4.3.1 Principle . 14
4.3.2 Reagents and materials . 14
4.3.3 Apparatus . 14
4.3.4 Preparation of the test mixture . 16
4.3.5 Procedure. 17
4.3.6 Determination of explosion limits . 17
4.3.7 Determination of the limiting oxygen concentration . 18
4.4 Determination of the limiting oxygen concentration . 18
4.4.1 Metering devices and additional equipment . 18
4.4.2 Procedure. 19
Figure 2 — Short procedure scheme for the determination of the LAC . 20
Figure 3 — Extended procedure scheme for the determination of the LAC . 21
4.5 Recording of results . 22
4.5.1 General . 22
4.5.2 Determination of explosion limits . 22
4.5.3 Determination of the limiting oxygen concentration . 23
5 Verification . 23
6 Test report . 23
Annex A (normative) Method for determination of the explosion limits and limiting oxygen
concentration of substances that are difficult to ignite . 25
A.1 Background . 25
A.2 Explanation . 25
A.2.1 Explosion criterion — flame detachment . 25
A.2.2 Degree of halogenation . 25
A.3 Apparatus . 25
A.3.1 Test vessel . 25
A.3.2 Reagents and materials . 26
A.3.3 Ignition source . 26
A.3.4 Equipment for preparing the test mixture . 26
A.4 Safety equipment . 26
A.5 Preparation of the test mixture . 26
A.6 Procedure . 27
A.6.1 Determination of LEL and UEL . 27
A.6.2 Determination of LOC . 27
Annex B (informative) Conversion of the values for the explosion limits . 28
B.1 Abbreviations and symbols . 28
B.2 Substance characteristics of air . 28
B.3 Definitions . 29
B.4 Mixture preparation . 29
B.5 Conversion . 30
Table B.1 — Formulas for the conversion . 31
Annex C (informative) Examples to describe flame detachment . 32
Annex D (informative) Example of recommended evaporator equipment . 33
Figure D.1 — Evaporator equipment for producing test mixtures from liquid flammable
substances . 33
Annex E (normative) Safety measures . 35
E.1 General . 35
E.2 General safety measures . 35
E.3 Additional safety measures concerning the tube method . 35
Annex F (informative) Examples of the determination of the LOC . 36
F.1 Example 1: determination of the LOC – short procedure . 36
Figure F.1 — Determination of the LAC of a ternary system of n-hexane, air and nitrogen at
100 °C and ambient pressure . 36
F.2 Example 2: determination of the LOC – extended procedure . 36
Figure F.2 — Determination of the LAC of a ternary system of hydrogen, air and nitrogen at
20 °C and ambient pressure . 37
Annex G (normative) Verification . 38
Table G.1 — Data for verification of the apparatus with respect to the lower explosion limit . 38
Table G.2 — Data for verification of the apparatus with respect to the upper explosion limit . 38
Annex H (informative) Example of a form expressing the results . 40
Annex I (informative) Significant Changes between this Eur
...