EN 1839:2017

European foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Test methods
5 Verification
6 Test report
Annex A (normative) - Method for determination of the explosion
        limits and limiting oxygen concentration of substances that
        are difficult to ignite
Annex B (informative) - Conversion of the values for the
        explosion limits
Annex C (informative) - Examples to describe flame detachment
Annex D (informative) - Example of recommended evaporator equipment
Annex E (normative) - Safety measures
Annex F (informative) - Examples of the determination of the LOC
Annex G (normative) - Verification
Annex H (informative) - Example of a form expressing the results
Annex I (informative) - Significant Changes between this European
        Standard and EN 1839:2012 and EN 14756:2006
Annex ZA (informative) - Relationship between this European
         Standard and the essential requirements of Directive
         2014/34/EU aimed to be covered
Bibliography

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.