EN 26184-4:1991
(Main)Explosion protection systems - Part 4 : Determination of efficacy of explosion suppression systems (ISO 6184-4:1985)
Explosion protection systems - Part 4 : Determination of efficacy of explosion suppression systems (ISO 6184-4:1985)
Per BT C012/2006 transfer of responsibility from CEN/TC 191 to CEN/TC 305.
Explosions-Schutzsysteme - Teil 4 : Bestimmung der Wirksamkeit von Explosions-Unterdrückungs-Systemen (ISO 6184-4:1985)
Systèmes de protection contre les explosions - Partie 4 : Détermination de l'efficacité des systèmes de suppression des explosions (ISO 6184-4:1985)
Sistemi za zaščito pred eksplozijo - 4. del: Ugotavljanje učinkovitosti sistemov za dušenje eksplozij
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Explosions-Schutzsysteme - Teil 4 : Bestimmung der Wirksamkeit von Explosions-Unterdrückungs-Systemen (ISO 6184-4:1985)Systemes de protection contre les explosions - Partie 4 : Détermination de l'efficacité des systemes de suppression des explosions (ISO 6184-4:1985)Explosion protection systems - Part 4 : Determination of efficacy of explosion suppression systems (ISO 6184-4:1985)13.230Varstvo pred eksplozijoExplosion protectionICS:Ta slovenski standard je istoveten z:EN 26184-4:1991SIST EN 26184-4:1996en01-maj-1996SIST EN 26184-4:1996SLOVENSKI
STANDARD
SIST EN 26184-4:1996
SIST EN 26184-4:1996
SIST EN 26184-4:1996
International Standard 618414 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEX~YHAPO~HAR OPrAHM3ALU’lR I-IO CTAH~APTl43ALWl*ORGANISATlON INTERNATIONALE DE NORMALISATION Explosion protection Systems - Part 4: Determination of efficacy of explosion suppression Systems S yst&mes de pro tection con tre les explosions - Partie 4: Dhermination de l’efficacitk des syst&mes de suppression des explosions First edition - 1985-11-15 UDC 614.838 Ref. No. ISO 6184/4-1985 (E) Descriptors : explosion proofing, explosion suppression Systems, tests, effectiveness. Price based on 4 pages SIST EN 26184-4:1996
Foreword ISO (the International Organization for Standardization) is a worldwide federation of national Standards bodies (ISO member bedies). The work of preparing International Standards is normally carried out through ISO technicai committees. Esch member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 6184/4 was prepared by Technical Committee lSO/TC 27, Equipmen t for fire pro tection and fire fighting. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its Jatest edition, unless otherwise stated. 0 International Organkation for Standardkation, 1985 0 Printed in Switzerland SIST EN 26184-4:1996
INTERNATIONAL STANDARD ISO 6184/4-1985 (E) Explosion protection Systems - Part 4: Determination of efficacy of explosion suppression Systems 0 lntroduction 0.1 Explosion suppression is a technique by which a develop- ing explosion in a confined, or essentially confined, volume is detected and arrested during its incipient Stage, thus limiting pressure development to a safe or predetermined value and preventing or minimizing darnage. The Performance of an explosion suppression System is a func- tion of the following : . a) the nature and explosibility of the combustible material ; b) the environmental conditions of temperature, pressure, turbulente, product flow, etc. ; c) the size and geometry of the Container; d) the effectiveness of the explosion suppressant; e) the Performance characteristics of the explosion sup- Pression hardware ; f) the deployment and choice of hardware for the System. 0.2 This par-t of ISO 6184 is one of a series dealing with ex- plosion protection Systems. The other Parts are as follows: Part 1 : Determination of explosion indices of combustible dusts in air. Part 2: Determination of explosion indices of combustible gases in air. Part 3: Determination of explosion indices of fuel/air mix- tures other than dust/air and gas/air mixtures. 0.3 lt should be recognized that the results obtained from the use of the methods specified in the other Parts of ISO 6184, either by measurement, interpolation or extrapolation, refer to defined test conditions representing a generalization of typical operational conditions. The Validation of the application of an explosion suppression System for a particular hazard may require further test work and/or theoretical evaluation. Such interpretation and applica- tion shall be undertaken by those who are experienced in this field of explosion protection. The design of explosion suppression Systems for hazards which have explosion Parameters significantly different from those realised in the Standard test procedures should be left to specialists in this field of explosion protection. Examples of such hazards are those characterized by one or more of the following Parameters : a) vessel aspect ratio greater than 2 : 1 ; b) partially vented vessels ; c) Container fitted with fixed or mobile apparatus which could impede the distribution of suppressant; d) operating pressures and temperatures substantially higher or lower than normal atmospheric conditions; e) high levels of turbulente and/or product throughput; f) vessel volumes substantially greater or lower than those used in the efficacy test. 1 Scope This part of ISO 6184 specifies a method for evaluating the ef- fectiveness of explosion suppression Systems against defined explosions in an enclosed volume. lt gives the criteria for alter- native test apparatus used to undertake explosion suppression efficacy tests and criteria to be applied in defining the safe operating regime of an explosion suppression System. 2 Field of application This part of ISO 6184 is applicable only to explosion suppres- sion Systems intended for the protection of closed, or essential- ly closed, vessels in which an expfosion may result as a conse- quence of ignition of an explosive mixture. lt does not apply to : a) Systems which render explosive and pyrotechnic materials insensitive to ignition, explosion and/or deton- ation ; b) Systems or devices designed to protect against over- pressure of vessels containing steam, compressed gases, liquified gases or unstable reactants ; c) Systems or devices designed to protect against exother- mit dissociation or polymerization reactions ; d) explosion suppression Systems for use in ducts or mine galleries ; e) Systems or devices designed specifically for the purpose of prevention of ignition of explosive mixtures. The deployment of fire protection measures, which are outside the scope of this part of ISO 6184, may be necessary after the suppression of the explosion to prevent reignition in the part of the plant concerned. 1 SIST EN 26184-4:1996
ISO 6184/4-1985 (El 3 Definitions For the purpose of this International Standard, the definitions given in Parts 1, 2 and 3 of ISO 6184 and the following defini- tions apply. 3.1 suppressor: Appliance containing an explosion sup- pressant which tan be expelled by the action of internal pressure. This pressure may be stored pressure, or may be ob- tained by a Chemical
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