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eLibrary > BS EN ISO/IEC 80079-49:2024 Explosive atmospheres - Flame arresters. Performance requirements, test methods and limits for use >

BS EN ISO/IEC 80079-49:2024 Explosive atmospheres - Flame arresters. Performance requirements, test methods and limits for use, 2024

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Annex ZA (informative)Relationship between this European Standard and the essential requirements of Directive 2014/34/EU aimed to be covered [Go to Page]
CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Abbreviated terms and symbols
5 Hazards and flame arrester classifications [Go to Page]
5.1 Flame transmission classification: deflagration, stable and unstable detonation
5.2 Flame transmission classification: stabilized burning
5.3 Index of tests
Tables [Go to Page]
Table 1 – Flame arrester classification for deflagration, stable and unstable detonation
6 General requirements [Go to Page]
6.1 Measuring instruments
Table 2 – Summary of tests to be conducted
6.2 Flow measurement (air)
6.3 Flame transmission test [Go to Page]
6.3.1 General
6.3.2 Test mixtures
Table 3 – Specification of gas-air mixtures for deflagration and detonation tests
Table 4 – Specification of gas-air mixtures for short time burning tests and burning tests of dynamic flame arresters
7 Specific requirements for static flame arresters [Go to Page]
7.1 Construction requirements for prototype arresters
7.2 Design series
Table 5 – Specification of gas-air or vapour-air mixtures for endurance burning tests of static flame arresters
7.3 Flame transmission tests [Go to Page]
7.3.1 General
Table 6 – Design series [Go to Page]
7.3.2 Deflagration test
Figures [Go to Page]
Figure 1 – Test apparatus for end-of-line flame arrester for deflagration test
Figure 2 – Test apparatus for in-line flame arrester for deflagration test [Go to Page]
7.3.3 Tests for detonation flame arresters
Figure 3 – Test apparatus for pre-volume flame arrester for deflagration test
Figure 4 – Test apparatus for detonation flame arrester for detonation without restriction
Table 7 – Ratio pmd/pTB
Figure 5 – Test apparatus for detonation flame arrester for detonation with restriction [Go to Page]
7.3.4 Short time burning test
Figure 6 – Test apparatus for short time burning test [Go to Page]
7.3.5 Endurance burning test
Figure 7 – Test apparatus for endurance burning test
8 Specific requirements for liquid product detonation flame arresters [Go to Page]
8.1 Liquid seals
8.2 Foot valves
Figure 8 – Liquid product detonation flame arrester
Figure 9 – End-of-line flame arrester incorporating a non-return valve (foot valve)
8.3 Flame transmission test
Figure 10 – Test apparatus for liquid product detonation flame arresters
9 Specific requirements for dynamic flame arresters (high velocity vent valves) [Go to Page]
9.1 General
9.2 Flame transmission tests [Go to Page]
9.2.1 Low flow flame transmission test
9.2.2 Flame transmission test by opening and closing
Figure 11 – Test apparatus for determining the non-hammering conditions for dynamic flame arresters [Go to Page]
9.2.3 Deflagration test
9.2.4 Endurance burning test
10 Specific requirements for hydraulic flame arresters [Go to Page]
10.1 Equipment
10.2 Flame transmission tests [Go to Page]
10.2.1 General
10.2.2 Short time burning test
10.2.3 Deflagration test
10.2.4 Detonation test
Figure 12 – Test apparatus for hydraulic flame arresters
11 Test of flame arresters installed on or within gas conveying equipment [Go to Page]
11.1 General
11.2 Flame transmission tests [Go to Page]
11.2.1 General
Figure 13 – Test apparatus for the flame transmission test of flame arresters installed on or within gas conveying equipment [Go to Page]
11.2.2 Test procedure for gas conveying equipment with inlet pressure > 600 hPa
Table 8 – Number of the individual tests and test parameters for the flame transmission test of flame arresters installed on or within gas conveying equipment with inlet pressures > 600 hPa [Go to Page]
11.2.3 Test procedure for gas conveying equipment with inlet pressure ≤ 600 hPa
12 Instructions [Go to Page]
Table 9 – Number of the individual tests and test parameters for the flame transmission test of flame arresters installed on or within gas conveying equipment with inlet pressures ≤ 600 hPa
13 Marking [Go to Page]
13.1 Location
13.2 Flame arrester housing [Go to Page]
13.2.1 General information
13.2.2 Warning markings
13.2.3 Examples of marking
Figure 14 – Example of marking plate, burn rating "a"
Figure 15 – Example of marking plate, burn rating "b"
13.3 Flame arrester element
14 Manufacturing and production [Go to Page]
14.1 Construction
14.2 Housing
14.3 Joints
14.4 Pressure test
14.5 Leak test
Annex A (normative) Flow measurement [Go to Page]
A.1 General
A.2 In-line flame arresters
A.3 End-of-line flame arrester [Go to Page]
A.3.1 General
Figure A.1 – Test apparatus for recording the pressure drop/flow rate curve for in-line flame arresters [Go to Page]
A.3.2 Special flow measurement for dynamic flame arresters
A.4 Undamped oscillation tests of dynamic flame arrester (High velocity vent valves)
Figure A.2 – Test apparatus for recording the pressure drop/flow rate curve for end-of-line flame arresters with or without integrated pressure/vacuum valve
Figure A.3 – Test apparatus for determining the non-oscillating conditions for dynamic flame arresters
Annex B (informative) Information for selecting flame arresters [Go to Page]
Table B.1 – Information for selecting flame arresters
Annex C (informative) Recommended practice
Annex D (informative) Evaluation of test results [Go to Page]
Figure D.1 – Decision process for stable detonation arrester (DET3 and DET4)
Figure D.2 – Decision process for unstable detonation arrester (DET1 and DET2)
Annex E (normative) Application [Go to Page]
E.1 General
E.2 Limits for use for static flame arresters [Go to Page]
E.2.1 In-line flame arrester
E.2.2 Pre-volume flame arrester
E.2.3 Detonation flame arrester
E.2.4 Short time burn flame arrester
E.3 Limits for use for liquid detonation flame arresters
E.4 Limits for use for dynamic flame arresters (high velocity vent valves)
E.5 Limits for use for hydraulic flame arresters
Figure E.1 – Test apparatus for hydraulic flame arresters
Annex F (informative) Significant changes between this document and EN ISO 16852:2016 [Go to Page]
Table F.1 – Significant changes with respect to EN ISO 16852:2016
Bibliography [Go to Page]

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