FprEN ISO/IEC 80079-49

Explosive atmospheres - Part 49: Flame arresters - Performance requirements, test methods and limits for use (ISO/IEC/FDIS 80079-49:2023)

This document specifies the requirements for flame arresters that prevent flame transmission when explosive gas-air or vapour-air mixtures are present. It establishes uniform principles for the classification, basic construction and information for use, including the marking of flame arresters, and specifies test methods to verify the safety requirements and determine safe limits of use. This document is applicable to pressures ranging from 80 kPa to 160 kPa and temperatures ranging from -20 °C to +200 °C. This document does not apply to the following: - external safety-related measurement and control equipment that might be required to keep the operational conditions within the established safe limits; - flame arresters used for explosive mixtures of vapours and gases, which tend to self-decompose (for example, acetylene) or which are chemically unstable; - flame arresters used for carbon disulfide, due to its special properties; - flame arresters whose intended use is for mixtures other than gas-air or vapour-air mixtures (for example, higher oxygen-nitrogen ratio, chlorine as oxidant); - flame arrester test procedures for reciprocating internal combustion engines; - fast acting valves, extinguishing systems and other explosion isolating systems; - Flame arresters used in gas detectors (those being covered for example, by IEC 60079‑29‑1 and IEC 62990‑1). This edition cancels and replaces ISO 16852:2016, which has been technically revised. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to ISO 16852:2016: a) adaptation of the relevant IEC TC 31 requirements on standards; b) modification of the upper limit of the temperature range from 150 °C to 200 °C under the condition that T0 shall be not larger than 80 % of the auto ignition temperature of the gas-air-mixture; c) change of the term "explosion group" to "equipment group" due to editorial requirements in IEC/TC 31; d) clarification of the conditions and requirements for flame arresters whose intended operating conditions are outside the atmospheric conditions in 7.3.4 and 7.3.5; e) clarification of the requirements on the information for use in Clause 12 f) concerning the burn time; f) addition of a permission to the construction requirements both in 7.1 and 14.1 to substitute visual inspection by performing a flow test; g) addition of a flow chart for the evaluation of test results as Annex D

Explosive Atmosphären - Teil 49: Flammendurchschlagsicherungen - Leistungsanforderungen, Prüfverfahren und Einsatzgrenzen (ISO/IEC/FDIS 80079-49:2023)

Dieses Dokument legt die Anforderungen an Flammendurchschlagsicherungen fest, die Flammen-durchschläge bei Vorhandensein von explosionsfähigen Gas-Luft- oder Dampf-Luft-Gemischen verhindern. Es stellt einheitliche Grundsätze für die Klassifizierung, die grundlegende Konstruktion und die Informationen für den Einsatz einschließlich der Kennzeichnung von Flammendurchschlagsicherungen auf und legt Prüfverfahren zur Überprüfung der sicherheitstechnischen Anforderungen und zur Bestimmung der sicheren Einsatzgrenzen fest.
Dieses Dokument gilt für Drücke von 80 kPa bis 160 kPa und für Temperaturen von −20 °C bis +200 °C.
ANMERKUNG 1   Für Flammendurchschlagsicherungen unter Betriebsbedingungen innerhalb des Anwendungsbereichs, aber außerhalb der atmosphärischen Bedingungen, siehe Anhang E.
ANMERKUNG 2   Dieses Dokument kann für Betriebsbedingungen, die von den oben festgelegten abweichen, als Leitlinie für die Auslegung und Prüfung von Flammendurchschlagsicherungen dienen. Dieses Dokument kann auch für die Auslegung zusätzlicher Prüfungen im Zusammenhang mit den spezifischen Einsatzbedingungen verwendet werden. Dies ist besonders bei hohen Temperaturen und Drücken wichtig. Die Prüfgemische müssten in diesen Fällen möglicherweise verändert werden.
Dieses Dokument gilt nicht für folgende Produkte:
   externe sicherheitsrelevante Mess- und Überwachungseinrichtungen, die erforderlich sein könnten, um die Betriebsbedingungen innerhalb der festgelegten sicheren Grenzen zu halten;
ANMERKUNG 3   Eingebaute Mess- und Überwachungseinrichtungen, wie z. B. integrierte Temperatur- und Flammenmessfühler sowie Bauteile, bei denen es beispielsweise beabsichtigt ist, dass sie schmelzen (Rückhaltestift), wegbrennen (Wetterhauben) oder sich verformen (Bimetallstreifen), fallen in den Anwendungsbereich dieses Dokuments.
   Flammendurchschlagsicherungen für explosionsfähige Gemische aus Dämpfen und Gasen, die zum Selbstzerfall neigen (z. B. Acetylen) oder die chemisch instabil sind;
   Flammendurchschlagsicherungen, die bei Schwefelkohlenstoff eingesetzt werden, da dieser spezielle Eigenschaften besitzt;
   Flammendurchschlagsicherungen, die bestimmungsgemäß für andere Gemische als Gas-Luft- oder Dampf-Luft-Gemische (z. B. höheres Verhältnis Sauerstoff-Stickstoff, Chlor als Oxidationsmittel) eingesetzt werden sollen;
   Prüfverfahren für Flammendurchschlagsicherungen an Hubkolben-Verbrennungsmotoren;
ANMERKUNG 4   Dies schließt die Auslegungsanforderungen ein, nicht aber die Prüfung nach dem Einbau;
   Schnellschlussventile, Löschsysteme und andere Explosionsentkoppelungssysteme;
   Flammendurchschlagsicherungen, die in Gaswarngeräten verwendet werden (z. B. diejenigen nach IEC 60079 29 1 und IEC 62990 1).

Atmosphères explosives - Partie 49: Titre manque (ISO/IEC/FDIS 80079-49:2023)

Eksplozivne atmosfere - 49. del: Plamenske zapore - Zahtevane lastnosti, preskusne metode in omejitve uporabe (ISO/IEC/FDIS 80079-49:2023)

General Information

• Status: Not Published
• Publication Date: 04-Apr-2024
• ICS: 13.220.20 - Fire protection
• Technical Committee: CEN/TC 305 - Potentially explosive atmospheres - Explosion prevention and protection
• Drafting Committee: CEN/TC 305 - Potentially explosive atmospheres - Explosion prevention and protection
• Current Stage: 6055 - CEN Ratification completed (DOR) - Publishing
• Start Date: 05-Feb-2024
• Completion Date: 05-Feb-2024
• 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)
• Mandate: M/596 - [C(2023)4798] Commission Implementing Decision of 20.7.2023 on a standardisation request as regards equipment and protective systems intended for use in potentially explosive atmospheres in support of Directive 2014/34/EU (ATEX) of the European Parliament and of the Council
• 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: kSIST FprEN ISO/IEC 80079-49:2023 - Explosive atmospheres - Part 49: Flame arresters - Performance requirements, test methods and limits for use (ISO/IEC/FDIS 80079-49:2023)

Relations

• Revises: EN ISO 16852:2016 - Flame arresters - Performance requirements, test methods and limits for use (ISO 16852:2016)
• Effective Date: 18-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN ISO/IEC 80079-49:2022
01-november-2022
Eksplozivne atmosfere - 49. del: Plamenske zapore - Zahtevane lastnosti,
preskusne metode in omejitve uporabe (ISO/IEC/DIS 80079-49:2022)
Explosive atmospheres - Part 49: Flame arresters - Performance requirements, test
methods and limits for use (ISO/IEC/DIS 80079-49:2022)
Explosive Atmosphären - Teil 49: Flammendurchschlagsicherungen -
Leistungsanforderungen, Prüfverfahren und Einsatzgrenzen (ISO/IEC/DIS 80079-
49:2022)
Atmosphères explosives - Partie 49: Titre manque (ISO/IEC/DIS 80079-49:2022)
Ta slovenski standard je istoveten z: prEN ISO/IEC 80079-49
ICS:
13.220.20 Požarna zaščita Fire protection
13.230 Varstvo pred eksplozijo Explosion protection
29.260.20 Električni aparati za Electrical apparatus for
eksplozivna ozračja explosive atmospheres
oSIST prEN ISO/IEC 80079-49:2022 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN ISO/IEC 80079-49:2022

oSIST prEN ISO/IEC 80079-49:2022
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ISO/IEC DIS 80079-49
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Voting begins on: Voting terminates on:
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Explosive atmospheres —
Part 49:
Flame arresters — Performance requirements, test
methods and limits for use
ICS: 13.220.20
Member bodies are requested to consult relevant national interests in IEC/SC
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oSIST prEN ISO/IEC 80079-49:2022
ISO/IEC DIS 80079-49:2022(E)
DRAFT INTERNATIONAL STANDARD
ISO/IEC DIS 80079-49
ISO/TMBG Secretariat: ISO
Voting begins on: Voting terminates on:
2022-09-02 2022-11-25
Explosive atmospheres —
Part 49:
Flame arresters — Performance requirements, test
methods and limits for use
ICS: 13.220.20
Member bodies are requested to consult relevant national interests in IEC/SC
31M before casting their ballot to the e-Balloting application.
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
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NATIONAL REGULATIONS.
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oSIST prEN ISO/IEC 80079-49:2022

oSIST prEN ISO/IEC 80079-49:2022
31M/173/CDV – 2 – ISO/IEC 80079-49 © IEC:2021
1 CONTENTS
3 FOREWORD . 5
4 INTRODUCTION . 7
5 1 Scope . 8
6 2 Normative references . 8
7 3 Terms and definitions . 9
8 4 Abbreviated terms and symbols . 12
9 5 Hazards and flame arrester classifications . 14
10 5.1 Flame transmission classification: deflagration, stable and unstable
11 detonation . 14
12 5.2 Flame transmission classification: stabilized burning. 14
13 5.3 Index of tests . 14
14 6 General requirements . 15
15 6.1 Measuring instruments . 15
16 6.2 Flow measurement (air) . 15
17 6.3 Flame transmission test . 16
18 6.3.1 General . 16
19 6.3.2 Test mixtures . 16
20 7 Specific requirements for static flame arresters . 18
21 7.1 Construction requirements for prototype arresters . 18
22 7.2 Design series . 18
23 7.3 Flame transmission tests . 19
24 7.3.1 General . 19
25 7.3.2 Deflagration test . 19
26 7.3.3 Detonation test . 23
27 7.3.4 Short time burning test . 28
28 7.3.5 Endurance burning test . 31
29 7.4 Requirements for use of flame arresters . 32
30 7.4.1 General . 32
31 7.4.2 In-line deflagration flame arrester . 33
32 7.4.3 Pre-volume flame arrester . 33
33 7.4.4 Detonation flame arrester . 33
34 7.4.5 Short time burn flame arresters . 33
35 8 Specific requirements for liquid product detonation flame arresters . 34
36 8.1 Liquid seals . 34
37 8.2 Foot valves . 34
38 8.3 Flame transmission test . 35
39 9 Specific requirements for dynamic flame arresters (high velocity vent valves). 36
40 9.1 General . 36
41 9.2 Flame transmission tests . 37
42 9.2.1 Low flow flame transmission test . 37
43 9.2.2 Flame transmission test by opening and closing . 38
44 9.2.3 Deflagration test . 39
45 9.2.4 Endurance burning test . 39
46 10 Specific requirements for hydraulic flame arresters . 40
47 10.1 Equipment . 40

oSIST prEN ISO/IEC 80079-49:2022
ISO/IEC 80079-49 © IEC:2021 – 3 – 31M/173/CDV
48 10.2 Flame transmission tests . 40
49 10.2.1 General . 40
50 10.2.2 Short time burning test . 40
51 10.2.3 Deflagration test . 40
52 10.2.4 Detonation test . 41
53 11 Test of flame arresters installed on or within gas conveying equipment . 43
54 11.1 General . 43
55 11.2 Flame transmission tests . 43
56 11.2.1 General . 43
57 11.2.2 Test procedure for gas conveying equipment with inlet pressure
58 > 600 hPa . 45
59 11.2.3 Test procedure for gas conveying equipment with inlet pressure
60 ≤ 600 hPa . 46
61 12 Instructions . 46
62 13 Marking . 47
63 13.1 Location . 47
64 13.2 Flame arrester housing . 47
65 13.2.1 General information . 47
66 13.2.2 Warning markings . 48
67 13.2.3 Examples of marking . 49
68 13.3 Flame arrester element . 49
69 14 Manufacturing and production. 50
70 14.1 Construction . 50
71 14.2 Housing . 50
72 14.3 Joints . 50
73 14.4 Pressure test . 50
74 14.5 Leak test . 50
75 Annex A (normative) Flow measurement . 52
76 A.1 General . 52
77 A.2 In-line flame arresters . 52
78 A.3 End-of-line flame arrester . 53
79 A.3.1 General . 53
80 A.3.2 Special flow measurement for dynamic flame arresters . 54
81 A.4 Undamped oscillation tests of dynamic flame arrester (High velocity vent
82 valves) . 55
83 Annex B (informative) Information for selecting flame arresters. 57
84 Annex C (informative) Best practice . 58
85 Annex D (informative) Evaluation of test results . 59
86 Annex E (normative) Applicati
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