EN 14034-1:2004

Determination of explosion characteristics of dust clouds - Part 1: Determination of the maximum explosion pressure pmax of dust clouds

This document describes a test method for the determination of the maximum explosion pressure 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, substances 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.

Bestimmung der Explosionskenngrößen von Staub/Luft-Gemischen - Teil 1: Bestimmung des maximalen Explosionsdruckes pmax von Staub/Luft-Gemischen

Dieses Dokument beschreibt ein Prüfverfahren für die Bestimmung des maximalen Explosionsdruckes von Staubwolken in einem geschlossenen Behälter unter definierten Anfangsbedingungen von Druck und Temperatur.
Dieses Verfahren ist nicht geeignet für Sprengstoffe wie Schießpulver und Dynamit sowie Stoffe, die ohne Sauerstoff verbrennen, pyrophore Stoffe oder Stoffe bzw. Stoffgemische, die sich unter bestimmten Umständen ähnlich verhalten. Wenn Zweifel über eventuell vorhandene Gefährdungen durch die Explosionswirkung bestehen, sollten Fachleute zu Rate gezogen werden.

Détermination des caractéristiques d'explosion des nuages de poussière - Partie 1 : Détermination de la pression maximale d'explosion pmax des nuages de poussière

La présente norme décrit une méthode d'essai permettant de déterminer la pression maximale d'explosion des nuages de poussière dans un récipient fermé, dans des conditions initiales définies de pression et de température.
Cette méthode ne convient pas aux explosifs reconnus comme tels, comme la poudre et la dynamite, aux explosifs dont la combustion ne nécessite pas d'oxygène, aux substances pyrophoriques, ou aux substances ou mélanges de substances pouvant, dans certaines circonstances, se comporter de manière similaire. Lorsqu'il existe un doute sur l'existence d'un phénomène dangereux en raison de propriétés explosives, il convient de faire appel à l'avis d'experts.

Ugotavljanje eksplozijskih značilnosti oblakov prahu - 1. del: Ugotavljanje najvišjega tlaka eksplozije pmax oblakov prahu

General Information

• Status: Withdrawn
• Publication Date: 07-Sep-2004
• Withdrawal Date: 11-Jan-2011
• ICS: 13.230 - Explosion protection
• Technical Committee: CEN/TC 305 - Potentially explosive atmospheres - Explosion prevention and protection
• Drafting Committee: CEN/TC 305/WG 1 - Test methods for determining the flammability characteristics of substances (provisional title)
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 12-Jan-2011
• Completion Date: 12-Jan-2011
• Directive: 94/9/EC - Directive 94/9/EC of the European Parliament and the Council of 23 March 1994 on the approximation of the laws of the Member States concerning equipment and protective systems intended for use in potentially explosive atmospheres
• 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: SIST EN 14034-1:2005 - Determination of explosion characteristics of dust clouds - Part 1: Determination of the maximum explosion pressure pmax of dust clouds

Relations

• Merged Into: EN 14034-1:2004+A1:2011 - Determination of explosion characteristics of dust clouds - Part 1: Determination of the maximum explosion pressure pmax of dust clouds
• Effective Date: 19-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2005
8JRWDYOMDQMHHNVSOR]LMVNLK]QDþLOQRVWLREODNRYSUDKXGHO8JRWDYOMDQMH
QDMYLãMHJDWODNDHNVSOR]LMHSPD[REODNRYSUDKX
Determination of explosion characteristics of dust clouds - Part 1: Determination of the
maximum explosion pressure pmax of dust clouds
Bestimmung der Explosionskenngrößen von Staub/Luft-Gemischen - Teil 1: Bestimmung
des maximalen Explosionsdruckes pmax von Staub/Luft-Gemischen
Détermination des caractéristiques d'explosion des nuages de poussiere - Partie 1 :
Détermination de la pression maximale d'explosion pmax des nuages de poussiere
Ta slovenski standard je istoveten z: EN 14034-1:2004
ICS:
13.230 Varstvo pred eksplozijo Explosion protection
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 14034-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2004
ICS 13.230
English version
Determination of explosion characteristics of dust clouds - Part
1: Determination of the maximum explosion pressure p of
max
dust clouds
Détermination des caractéristiques d'explosion des nuages Bestimmung der Explosionskenngrößen von Staub/Luft-
de poussière - Partie 1 : Détermination de la pression Gemischen - Teil 1: Bestimmung des maximalen
maximale d'explosion pmax des nuages de poussière Explosionsdruckes pmax von Staub/Luft-Gemischen
This European Standard was approved by CEN on 9 July 2004.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14034-1:2004: E
worldwide for CEN national Members.

Contents page
Foreword.4
1 Scope .6
2 Normative references .6
3 Terms and definitions .6
4 Test apparatus .7
4.1 General.7
4.2 Explosion vessel.7
4.3 Dust dispersion system (dust container, fast acting valve, connecting tube, dust
disperser).9
4.4 Ignition source .11
4.5 Control unit.11
4.6 Pressure measuring system.11
5 Dust sample.11
6 Test procedure.12
7 Calibration and verification .14
7.1 Calibration .14
7.2 Verification .15
8 Safety precautions / instructions for use.15
9 Alternative test equipment / procedures.16
10 Test report .16
Annex A (normative) Electro pneumatic valve .17
Annex B (normative)  Dust disperser with 5 mm holes .19
Annex C (normative) 20 l sphere.23
C.1 General.23
C.2 Test apparatus .23
C.3 Test conditions .23
C.4 Test procedure.24
C.5 Calculation and correction of p .25
max
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 94/9 .26
Bibliography .27
Foreword.4
Introduction .5
1 Scope .6
2 Normative references .6
3 Terms and definitions .6
4 Test apparatus .7
4.1 General.7
4.2 Explosion vessel.7
4.3 Dust dispersion system (dust container, fast acting valve, connecting tube, dust
disperser) .9
4.4 Ignition source.11
4.5 Control unit .11
4.6 Pressure measuring system.11
5 Dust sample .11
6 Test procedure.12
7 Calibration and verification .14
7.1 Calibration.14
7.2 Verification .15
8 Safety precautions / instructions for use.15
9 Alternative test equipment / procedures.16
10 Test report.16
Annex A (normative) Electro pneumatic valve.17
Annex B (normative)  Dust disperser with 5 mm holes.19
Annex C (normative) 20 l sphere.23
Annex ZA (informative) Relationship between this European Standard and the Essential
Requirements of EU Directive 94/9.26
Bibliography.27

Foreword
This document (EN 14034-1:2004) has been prepared by Technical Committee CEN/TC 305 “Potentially
explosive atmospheres - Explosion prevention and protection”, the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by March 2005, and conflicting national standards shall be withdrawn at
the latest by March 2005.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Directive(s).
For relationship with EU Directive(s), see informative annex ZA, which is an integral part of this document.
This document includes a Bibliography.
This document is one of a series of standards as listed below:
 EN 14034-1,Determination of explosion characteristics of dust clouds - Part 1: Determination of the
maximum explosion pressure p of dust clouds;
max
 prEN 14034-2, Determination of explosion characteristics of dust clouds - Part 2: Determination of the
maximum rate of explosion pressure rise (dp/dt) of dust clouds;
max
 prEN 14034-3, Determination of explosion characteristics of dust clouds – Part 3: Determination of the
lower explosion limit LEL of dust clouds;
 EN 14034-4, Determination of explosion characteristics of dust clouds – Part 4: Determination of the
limiting oxygen concentration LOC of dust clouds.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland
and United Kingdom.
Introduction
This document specifies a method for experimental determination of the maximum explosion pressure of dust
clouds. The maximum explosion pressure is the maximum value of the overpressure during explosions of
explosive atmospheres in the explosion range of a combustible dust in a closed vessel. The measurement of
the maximum explosion pressure forms the basis for explosion protection by design and construction of
equipment, protective systems and components to reduce the explosion effects.
This maximum explosion pressure is a safety characteristic used for hazard identification and designing safety
measures for the mitigation of destructive effects of dust explosions.
Therefore this document gives added values to the following clauses of the EU directives:
 Directive 98/37/EC of the European Parliament and the Council of June 22, 1998 on the approximation of
the laws of the member states relating to machinery
Annex I, Clause 1.5.7
 Directive 94/9/EC of the European Parliament and the Council of March 23, 1994 o
...