EN 16020:2011
(Main)Explosion diverters
Explosion diverters
An explosion diverter is used to divert explosions propagating through ducts, thus preventing flame jet ignition and pressure piling in connected protected enclosures. It will reduce the risk of flame transmission.
This European Standard describes the basic design of a pipe-in-pipe diverter and specifies the testing requirements and the application of explosion diverters.
This European Standard covers:
- a test method for assessing the efficacy of explosion diverters;
- design rules for a type of pipe-in-pipe diverter;
- demands to venting device on diverter;
- installation requirements;
- maintenance requirements;
- marking.
This European Standard considers dust/air explosive atmospheres only.
Explosionsschlote
Ein Explosionsschlot wird zum Ableiten oder Umlenken von sich in Rohrleitungen ausbreitenden Explosionen verwendet, wodurch eine Flammenstrahlzündung und Vorkompressionseffekte in angeschlossenen geschützten Behältern verhindert wird. Er reduziert das Risiko einer Flammenübertragung.
Diese Europäische Norm beschreibt die grundlegende konstruktive Ausführung eines Rohr in Rohr Explosions¬schlotes, und sie legt die Prüfanforderungen und die Anwendbarkeit von Explosions-schloten fest.
In dieser Norm sind festgelegt:
- ein Prüfverfahren zur Bewertung der Wirksamkeit von Explosionsschloten;
- Konstruktionsvorschriften für einen Typ eines Rohr in Rohr Explosionsschlotes;
- Anforderungen an die Druckentlastungseinrichtung auf dem Explosionsschlot;
- Installationsanforderungen;
- Wartungsanforderungen;
- Kennzeichnung.
Diese Europäische Norm gilt nur für explosionsfähige Staub/Luft Gemische.
Dispositifs déviateurs d'explosion
Un déviateur d'explosion est utilisé pour dévier des explosions qui se propagent dans des canalisations,
empêchant ainsi l'inflammation par jet de flamme et la pré-compression dans les enceintes protégées et
reliées. Il diminue le risque de transmission de la flamme.
La présente Norme européenne décrit la conception de base d'un dispositif déviateur à tuyau interne et
spécifie les exigences d'essai ainsi que l'application des dispositifs déviateurs d'explosion.
La présente Norme Européenne traite :
⎯ d’une méthode d'essai destinée à évaluer l'efficacité des dispositifs déviateurs d’explosion ;
⎯ des règles de conception d'un type de déviateur à tuyau interne ;
⎯ des exigences relatives au dispositif d‘évent situé sur le déviateur ;
⎯ des exigences d'installation ;
⎯ des exigences de maintenance ;
⎯ du marquage.
La présente Norme européenne ne prend en compte que les atmosphères explosives dues à des mélanges
poussière/air.
Preusmerjevalniki eksplozij
Preusmerjevalnik eksplozij se uporablja za preusmerjanje eksplozij, ki se širijo prek kablov. Naprava se uporablja za preprečevanje vžiga plamena in kopičenje tlaka v povezavi z zaščitenimi ohišji, če je pravilno načrtovana. Ta standard določa osnovne zahteve za načrtovanje in uporabo preusmerjevalnikov eksplozij. Ta standard določa metode za ocenjevanje učinkovitosti preusmerjevalnikov eksplozij in trenutna merila za njeno povečanje. Treba je opozoriti, da se preusmerjevalnik eksplozij ne more uporabljati kot naprava za izolacijo eksplozije, saj prenosa plamena ni mogoče učinkovito preprečiti. Ta standard obravnava le preusmerjanje eksplozij, ki se širijo na vnetljiv prašni zrak, zrak s plinom (hlapi), mešanice zrak-meglica ali njihove hibride.
General Information
Overview
EN 16020:2011 - Explosion diverters (CEN, July 2011) defines the basic design, testing and application requirements for explosion diverters used in dust/air explosive atmospheres. The standard focuses on the common pipe-in-pipe diverter concept and specifies how to verify that a diverter will prevent flame jet ignition, pressure piling and reduce flame transmission through ducts. EN 16020:2011 applies to passive inline protective systems installed in ducting where combustible dust clouds may propagate.
Key topics and technical requirements
- Scope limitation: applies to dust/air explosive atmospheres only.
- Design rules: basic construction guidance for a pipe-in-pipe diverter (annexed drawings and recommendations).
- Explosion venting device: venting parts should comply with EN 14797 except that their efficiency on diverters is verified by EN 16020 test procedures.
- Mechanical integrity: diverter bodies must resist expected internal explosion loads (explosion-pressure resistant or pressure shock-resistant per EN 14460); restraining arrangements (e.g., cages) are required if parts may detach.
- Testing framework: two main test modules:
- Module A (mechanical integrity): one test to demonstrate the diverter withstands intended explosion pressures without producing flying parts.
- Module B (functional efficacy): assesses performance and establishes maximum permissible pipe lengths (installation distances). Module B has subsets B1–B4 depending on ignition location and objective. Acceptance criteria include either no flame beyond the diverter (stop propagation) or limits such as flame velocity < 100 m/s and explosion pressure < 0.3 bar at the inlet of the protected vessel. Test counts vary (e.g., 3 or 10 valid tests depending on subset).
- Installation, maintenance and marking: requirements for correct placement, service routines and product identification/marking are specified.
Applications and who uses it
EN 16020:2011 is intended for:
- Manufacturers of explosion protection equipment and pipe-in-pipe diverters
- Process, safety and plant engineers in dust-handling industries (food, wood, metal, chemical, pharmaceutical)
- Certification and testing laboratories verifying compliance
- Safety managers and compliance officers ensuring installations meet European requirements under CEN harmonization
Practical uses include selecting and certifying diverters for duct networks, defining installation distances, and setting maintenance and marking practices to manage dust explosion risk.
Related standards
Normative references and related standards frequently used with EN 16020:2011:
- EN 13237 (terms & definitions)
- EN 14034‑1 / EN 14034‑2 (dust explosion characteristics)
- EN 14460 (explosion resistant construction)
- EN 14491 (venting protective systems)
- EN 14797 (venting devices)
- EN 15089 (explosion isolation systems)
- EN ISO/IEC 17025 (testing laboratory competence)
Keywords: EN 16020:2011, explosion diverters, pipe-in-pipe diverter, dust explosion, explosion protection, venting device, testing requirements, CEN.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Preusmerjevalniki eksplozijExplosionsschloteDispositifs déviateurs d'explosionExplosion diverters13.230Varstvo pred eksplozijoExplosion protectionICS:Ta slovenski standard je istoveten z:EN 16020:2011SIST EN 16020:2011en,de01-oktober-2011SIST EN 16020:2011SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16020
July 2011 ICS 13.230 English Version
Explosion diverters
Dispositifs déviateurs d'explosion
Explosionsschlote This European Standard was approved by CEN on 25 June 2011.
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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, 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 STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16020:2011: ESIST EN 16020:2011
Constructional design of pipe-in-pipe diverters . 15Annex B (informative)
Explosion diverter types . 17B.1Single pipe-in-pipe explosion diverter. 17B.2Multiple pipe-in-pipe explosion diverter . 17B.3Combination systems . 18B.4Diverter with integrated internal closure (flap) . 19Annex ZA (informative)
Relationship between this European Standard and the Essential Requirements of EU Directive 94/9/EC . 20Bibliography . 21 SIST EN 16020:2011
This European Standard covers: a test method for assessing the efficacy of explosion diverters; design rules for a type of pipe-in-pipe diverter; demands to venting device on diverter; installation requirements; maintenance requirements; marking. This European Standard considers dust/air explosive atmospheres only. 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 13237, Potentially explosive atmospheres — Terms and definitions for equipment and protective systems intended for use in potentially explosive atmospheres EN 14034-1, Determination of explosion characteristics of dust clouds — Part 1: Determination of the maximum explosion pressure pmax of dust clouds EN 14034-2, Determination of explosion characteristics of dust clouds — Part 2: Determination of the maximum rate of explosion pressure rise (dp/dt)max of dust clouds EN 14460:2006, Explosion resistant equipment EN 14491: Dust explosion venting protective systems EN 14797, Explosion venting devices EN 15089:2009, Explosion isolation systems EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories
(ISO/IEC 17025:2005) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13237, EN 14797, EN 14491 , EN 15089:2009 and the following apply. SIST EN 16020:2011
Key 1,2,3 pressure transducer (Pt) 4
explosion diverter body (ED) 5
explosion diverter venting device L
installation distance Figure 2 — Test arrangement for mechanical and explosion resistance testing The dimensions of the pipe (length and diameter), the pipe arrangement (e.g. horizontal/vertical), the volume of the test vessel, the maximum reduced explosion pressure in the test vessel and the explosion characteristics of the explosive atmosphere shall reflect the intended use of the diverter (see 5.1). The length to diameter ratio of the vessel shall be equal to or smaller than 2,5 and the pipe volume up to the explosion diverter shall be smaller than the volume of the vessel. The explosion pressure generated within the diverter shall reflect the maximum allowable explosion pressure according to the intended use of the diverter. If the intended use includes scenarios in which the explosion can propagate in both directions, the testing shall be repeated with the diverter reversed such that the outlet now becomes the inlet. 5.2.2.3 Measuring technique The following parameter shall be measured: Pressure The explosion pressure shall be measured by installing transducers in the explosion enclosure, the diverter and the interconnecting duct (see Figure 2). The pressure transducer shall have a sufficient short response time. 5.2.2.4 Testing method Sufficient explosive dust shall be injected in the test vessel to generate an explosive dust/air mixture in the duct to support flame propagation into the diverter. The generation of the dust cloud inside the test vessel shall be carried out according to EN 14034-1 and EN 14034-2. SIST EN 16020:2011
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Frequently Asked Questions
EN 16020:2011 is a standard published by the European Committee for Standardization (CEN). Its full title is "Explosion diverters". This standard covers: An explosion diverter is used to divert explosions propagating through ducts, thus preventing flame jet ignition and pressure piling in connected protected enclosures. It will reduce the risk of flame transmission. This European Standard describes the basic design of a pipe-in-pipe diverter and specifies the testing requirements and the application of explosion diverters. This European Standard covers: - a test method for assessing the efficacy of explosion diverters; - design rules for a type of pipe-in-pipe diverter; - demands to venting device on diverter; - installation requirements; - maintenance requirements; - marking. This European Standard considers dust/air explosive atmospheres only.
An explosion diverter is used to divert explosions propagating through ducts, thus preventing flame jet ignition and pressure piling in connected protected enclosures. It will reduce the risk of flame transmission. This European Standard describes the basic design of a pipe-in-pipe diverter and specifies the testing requirements and the application of explosion diverters. This European Standard covers: - a test method for assessing the efficacy of explosion diverters; - design rules for a type of pipe-in-pipe diverter; - demands to venting device on diverter; - installation requirements; - maintenance requirements; - marking. This European Standard considers dust/air explosive atmospheres only.
EN 16020:2011 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 16020:2011 is associated with the following European legislation: EU Directives/Regulations: 2014/34/EU, 94/9/EC. 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.
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