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BS EN 15967:2022 – TC

BS EN 15967:2022 – TC

$217.84

Tracked Changes. Determination of maximum explosion pressure and the maximum rate of pressure rise of gases and vapours

Published By Publication Date Number of Pages
BSI 2022 96
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This document specifies a test method that is designed to measure the explosion pressure and the maximum explosion pressure, the rate of explosion pressure rise and the maximum rate of explosion pressure rise of a quiescent flammable gas/air/inert mixture in closed volume at ambient temperature and pressure. In this document, the term “gas” includes vapours but not mists. Detonation and decomposition phenomena are not considered in this document. The pressures and rates of pressure rise measured by the procedures specified in this document are not applicable to flameproof enclosures, i.e. enclosures intended to withstand an internal explosion and not to transmit it to an external explosive atmosphere, or any other closed volume where the internal geometry can result in pressure piling. Even in an enclosure of relatively simple geometry the disposition of the internal components can lead to rates of pressure rise significantly higher than those measured using this document. This document does not apply to the design and testing of flameproof enclosures in conformity with EN ISO 80079-37 (for non-electrical equipment) and EN 60079-1 (for electrical equipment).

PDF Catalog

PDF Pages PDF Title
54 undefined
60 1 Scope
2 Normative references
3 Terms and definitions
61 4 Test method
4.1 Principle
4.2 Apparatus
4.2.1 General
62 4.2.2 Test Vessel
4.2.3 Equipment for preparing the test mixture
4.2.4 Ignition system
4.2.4.1 General
63 4.2.4.2 Induction spark
4.2.4.3 Fusing wire
4.2.5 Pressure measuring system
64 4.2.6 Initial temperature measuring device
4.2.7 Safety aspects
65 4.3 Preparation and preservation of test samples
66 4.4 Procedure
4.4.1 Preparation of the test mixture
4.4.1.1 General
4.4.1.2 Preparation of the test mixture by partial pressures
4.4.1.3 Preparation of the test mixture by mixing flows
4.4.2 Determination of the explosion pressure pex, the maximum explosion pressure pmax, the rate of explosion pressure rise (dp/dt)ex and the maximum rate of explosion pressure rise (dp/dt)max
4.4.2.1 Test procedure
67 4.4.2.2 Determination of the explosion pressure pex
4.4.2.3 Determination of (dp/dt)ex
4.4.2.4 Determination of the maximum explosion pressure pmax and maximum rate of explosion pressure rise (dp/dt)max
69 4.5 Expression of results
4.5.1 Common aspects
4.5.2 Explosion pressure and maximum explosion pressure
70 4.5.3 Rate of pressure rise and maximum rate of pressure rise
71 4.6 Test report
73 Annex A (normative)Verification of maximum explosion pressure values
74 Annex B (normative)Verification of maximum rate of pressure rise
77 Annex C (normative)Smoothing of pressure-time curves
81 Annex D (informative)Conversion of the values for the flammable substance content
D.1 Abbreviations and symbols
D.2 Substance characteristics of air
82 D.3 Definitions
D.4 Preparation of the test mixture
85 Annex E (informative)Example of an evaporator equipment for liquid flammable substances
87 Annex F (informative)Example for test report form
90 Annex G (informative)Significant technical changes between this European Standard and the previous editions
91 Annex H (informative)Approximate dependence of the explosion pressure ratio on temperature
H.1 Definition of parameters
H.2 Deriving an equation for approximating the temperature dependence of the explosion pressure ratio
93 Annex ZA (informative)Relationship between this European Standard and the essential requirements of Directive 2014/34/EU aimed to be covered
94 Annex ZB (informative)Relationship between this European Standard and the essential requirements of Directive 2006/42/EC aimed to be covered

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BS EN 15967:2022 - TC
$217.84