EN 14034-3:2006+A1:2011

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Test apparatus
5 Dust sample
6 Test procedure
7 Calibration and verification
8 Safety precautions/instructions
9 Alternative test equipment/procedures
10 Test report
Annex A (normative) - Electro Pneumatic Valve
Annex B (normative) - Dust disperser with 5 mm holes
Annex C (normative) - 20 l sphere
Annex ZA (informative) - Relationship between this
         European Standard and the Essential
         Requirements of EU Directive 94/9/EC
Bibliography

This standard describes a test method for the determination of the lower explosion limit of dust clouds in a closed vessel under defined initial conditions of pressure and temperature. This method is not suitable for use with recognised explosives, like gunpowder and dynamite, explosives which do not require oxygen for combustion, pyrophoric substances, or substances or mixtures of substances which may under some circumstances behave in a similar manner. Where any doubt exists about the existence of hazard due to explosive properties, expert advice should be sought.