EN 14034-3:2006
(Main)Determination of explosion characteristics of dust clouds - Part 3: Determination of the lower explosion limit LEL of dust clouds
Determination of explosion characteristics of dust clouds - Part 3: Determination of the lower explosion limit LEL of dust clouds
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.
Bestimmung der Explosionskenngrößen von Staub/Luft-Gemischen - Teil 3: Bestimmung der unteren Explosionsgrenze UEG von Staub/Luft-Gemischen
Diese Norm legt ein Prüfverfahren fest für die Bestimmung der unteren Explosionsgrenze 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 3: Détermination de la limite inférieure d'explosivité LIE des nuages de poussière
La présente Norme spécifie une méthode d’essai pour déterminer la limite inférieure d’explosivité des nuages de
poussière dans un récipient fermé, dans des conditions initiales de pression et de températures définies.
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 et 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 – 3. del: Ugotavljanje spodnje meje eksplozivnosti SME oblakov prahu
General Information
- Status
- Withdrawn
- Publication Date
- 23-May-2006
- Withdrawal Date
- 11-Jan-2011
- Current Stage
- 9960 - Withdrawal effective - Withdrawal
- Start Date
- 12-Jan-2011
- Completion Date
- 12-Jan-2011
- Directive
- 98/37/EC - Machinery
Relations
- Effective Date
- 19-Jan-2023
Frequently Asked Questions
EN 14034-3:2006 is a standard published by the European Committee for Standardization (CEN). Its full title is "Determination of explosion characteristics of dust clouds - Part 3: Determination of the lower explosion limit LEL of dust clouds". This standard covers: 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.
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.
EN 14034-3:2006 is classified under the following ICS (International Classification for Standards) categories: 13.230 - Explosion protection. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 14034-3:2006 has the following relationships with other standards: It is inter standard links to EN 14034-3:2006+A1:2011. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 14034-3:2006 is associated with the following European legislation: EU Directives/Regulations: 94/9/EC, 98/37/EC; Standardization Mandates: M/079, M/BC/CEN/92/46. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
You can purchase EN 14034-3:2006 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Determination of explosion characteristics of dust clouds - Part 3: Determination of the lower explosion limit LEL of dust cloudsDétermination des caractéristiques d'explosion des nuages de poussiere - Partie 3: Détermination de la limite inférieure d'explosivité LIE des nuages de poussiereBestimmung der Explosionskenngrößen von Staub/Luft-Gemischen - Teil 3: Bestimmung der unteren Explosionsgrenze UEG von Staub/Luft-GemischenTa slovenski standard je istoveten z:EN 14034-3:2006SIST EN 14034-3:2006en13.230ICS:SLOVENSKI
STANDARDSIST EN 14034-3:200601-september-2006
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14034-3May 2006ICS 13.230 English VersionDetermination of explosion characteristics of dust clouds - Part3: Determination of the lower explosion limit LEL of dust cloudsDétermination des caractéristiques d'explosion des nuagesde poussière - Partie 3: Détermination de la limite inférieured'explosivité LIE des nuages de poussièreBestimmung der Explosionskenngrößen von Staub/Luft-Gemischen - Teil 3: Bestimmung der unterenExplosionsgrenze UEG von Staub/Luft-GemischenThis European Standard was approved by CEN on 20 April 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards 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 translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.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, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2006 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14034-3:2006: E
Electro Pneumatic Valve.17 Annex B (normative)
Dust disperser with 5 mm holes.19 Annex C (normative)
20 l sphere.22 C.1 General.22 C.2 Test apparatus.22 C.3 Test conditions.23 C.4 Test procedure.23 Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 94/9/EC.25 Bibliography.26 Figures Figure 1 — 1 m³ vessel (schematic).8 Figure 2 — Dust container with blasting cap activated valve as commonly used for explosion suppression (schematic; it is commercially available).9 Figure 3 — Location of the 6 mm holes in the dust disperser.11 Figure 4 — Dust dispersion and pressure-time curve.13 Figure 5 — Determination of the lower explosion limit LEL.14 Figure A.1 — Electro Pneumatic Valve (schematic).17 Figure A.2 — Discharge characteristic of dust dispersers (without dust).18
Annex II, Clause 1.0.1 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
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. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 14460, Explosion resistant equipment 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 dust small solid particles in the atmosphere which settle out under their own weight, but which may remain suspended in air for some time (includes dust and grit, as defined in ISO 4225) NOTE Generally maximum particle size will not exceed 500 µm. 3.2 combustible dust dust able to undergo an exothermic reaction with air when ignited NOTE The terms “flammable” and “combustible” are used synonymously. 3.3 explosion pressure pex highest overpressure occurring during an explosion of a dust cloud in a closed vessel 3.4 explosive atmosphere mixture with air, under atmospheric conditions, of flammable (combustible) substances in the form of gases, vapours, mists or dusts, in which, after ignition has occurred, combustion spreads to the entire unburned mixture 3.5 ignition delay tv time between the initiation of the dust dispersion and the activation of the ignition source 3.6 initial pressure pi pressure in the explosion vessel at the moment of ignition
Key 1 pressure sensor
5 dust container 2 chemical igniters
6 fast acting valve 3 inlet for purge air
7 connecting tube 4 dust disperser
8 outlet for exhaust gas Figure 1 — 1 m³ vessel (schematic)
Key 1 dust container
5 protective hood 2 mushroom shaped seal
6 protective hood 3 seal housing
7 blasting cap 4 support ring
8 connecting tube Figure 2 — Dust container with blasting cap activated valve as commonly used for explosion suppression (schematic; it is commercially available)
For dispersing the dust, a perforated semicircular spray pipe (dust disperser) is mounted inside the explosion vessel, concentric with its wall. The spray pipe, with an internal diameter of 21,7 mm1) is fitted with 13 holes of a diameter of 6 mm (incl. one hole in each end cap) which are located as shown in Figure 3 (see also Figure 1).
1) (e.g. EN ISO 1127, DN 20, 3/4")
...
The standard EN 14034-3:2006 is a crucial document that outlines a specific test method for determining the lower explosion limit (LEL) of dust clouds. Its scope is well-defined, focusing on the assessment of explosion hazards associated with dust in enclosed environments under controlled pressure and temperature conditions. This precision in its application ensures that industries dealing with particulates can accurately evaluate the risks of dust explosions, thereby enhancing safety protocols. One of the strengths of this standard is its clarity in delineating the specific conditions under which the test method is applicable. By explicitly stating that it pertains to dust clouds in a closed vessel and under defined initial parameters, the standard removes ambiguity in testing scenarios. This clear demarcation facilitates consistent application across various industries, contributing to a standardized approach to safety in handling combustible dust. Moreover, EN 14034-3:2006 effectively addresses the limitations of its applicability. It wisely excludes certain explosive materials, such as gunpowder and dynamite, from its scope. Recognizing the inefficacy of the method for substances that do not require oxygen for combustion or for pyrophoric materials underlines the standard's reliability and ensures that users avoid misapplication. Additionally, the recommendation to seek expert advice in ambiguous situations enhances the responsible use of the standard, ensuring that safety remains paramount. The relevance of this standard cannot be overstated in light of increasing awareness and regulation surrounding industrial safety and explosion prevention. As industries evolve, the need for reliable methods to determine the LEL of dust clouds becomes more critical. By employing the methods outlined in EN 14034-3:2006, organizations can adhere to safety regulations, reduce risks of dust explosions, and ultimately protect both personnel and property. In summary, EN 14034-3:2006 provides a comprehensive and precise framework for assessing the explosion characteristics of dust clouds, offering valuable guidance for industries where combustible dust may present a significant hazard. Its strengths lie in its clear scope, relevant exclusions, and concise recommendations for further inquiry, establishing it as a vital standard in the field of explosion safety.
標準 EN 14034-3:2006 は、粉塵雲の爆発特性を評価するための重要な文書であり、特に粉塵雲の下限爆発限界（LEL）の測定方法について詳述しています。この標準の範囲は、閉じた容器内での定められた初期条件（圧力および温度）下で試験を行うことに特化しています。 本標準の強みは、具体的かつ実践的な試験手順が明確に示されている点にあります。これにより、技術者や研究者は一貫した方法で粉塵雲の爆発特性を評価することが可能です。また、粉塵の爆発性に関するリスクを評価するうえで、信頼性の高いデータを提供するための指針として機能します。 さらに、EN 14034-3:2006 は爆発物や酸素を必要としない爆発物、または自発的に発火する物質についての使用を明確に除外しているため、報告書の範囲が明確で、誤った適用を防ぐための安全策が講じられています。この点は、実験や産業現場における安全性を重視する上で非常に重要です。 この標準は、粉塵爆発に関わる業界や研究機関にとって、粉塵雲の性質を理解し、適切な対策を講じるための基盤を提供するものであり、その関連性は高いと言えます。粉塵の爆発的性質に関する知識の向上は、労働安全の確保と業務の効率向上に寄与するため、今後の応用が期待される重要なスタンダードです。
EN 14034-3:2006 표준은 폐쇄 용기 내에서 정의된 압력 및 온도 조건 하에서 먼지 구름의 하한 폭발 한계(LEL)를 측정하는 시험 방법을 자세히 설명하고 있습니다. 이 표준의 범위는 먼지 폭발의 위험을 식별하고 이를 안전하게 관리하기 위한 중요한 기준을 제시합니다. 먼저, 이 표준의 강점은 실험 조건이 명확히 정의되어 있어 일관된 테스트 결과를 보장한다는 점입니다. 이는 다양한 산업 현장에서 먼지 폭발의 위험을 판단할 때 신뢰할 수 있는 데이터를 제공합니다. 또한, 표준은 인정된 폭발물, 산소 없이 연소가 발생하는 폭발성 물질, 자가 발화 물질 및 유사한 성질을 가진 물질들에 대해서는 적용되지 않음을 분명히 하여 안전성을 더욱 강화합니다. 또한, EN 14034-3:2006은 먼지 구름의 폭발 특성을 평가하는 데 있어 매우 중요한 문서로, 작업 안전 및 환경 보호 측면에서도 그 중요성이 강조됩니다. 이 표준을 통해 산업체는 적절한 위험 평가 및 관리를 수행할 수 있으며, 이를 통해 노동자의 안전과 생산 환경의 안정성을 높일 수 있습니다. 따라서 EN 14034-3:2006 표준은 먼지 폭발 관련 위험을 관리하는 데 필수적인 문서로, 그 적용 범위와 선도적인 테스트 방법론으로 인해 산업계에서 높은 관련성을 갖추고 있습니다.
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...