1、BRITISH STANDARDBS EN 13463-6:2005Non-electricalequipment for use in potentially explosive atmospheres Part 6: Protection by control of ignition source bThe European Standard EN 13463-6:2005 has the status of a British StandardICS 13.230g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44
2、g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58Licensed Copy: Wang Bin, na, Sun Oct 09 02:11:25 BST 2005, Uncontrolled Copy, (c) BSIBS EN 13463-6:2005This British Standard was published under the authority of t
3、he Standards Policy and Strategy Committee on 28 July 2005 BSI 28 July 2005ISBN 0 580 46450 4National forewordThis British Standard is the official English language version of EN 13463-6:2005.The UK participation in its preparation was entrusted to Technical Committee FSH/23, Fire precautions in ind
4、ustrial and chemical plant, which has the responsibility to:A list of organizations represented on this committee can be obtained on request to its secretary.Additional informationThe contents of informative Annex C were the subject of considerable debate during the development of this European Stan
5、dard. Those who are familiar with programmable electronic systems and their potentially complex failure modes see the need for much more detailed advice on designing equipment which has reliable protective systems. As pointed out in Annex C, EN 954-1:1996 does not effectively cover all of the princi
6、ples described in this European Standard for the purposes of assessing ignition control devices.Those from a mechanical background recognized that very simple devices can sometimes be used as safety systems. If designers were to consider all the issues covered in EN 61508 then this would be a barrie
7、r to the successful application of the principles found in this European Standard.This European Standard will need review and may be subject to amendment at a later date in the light of the full variety of new products that will be developed using its principles and the eventual publication EN 62061
8、.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or
9、 of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text;
10、present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK.Summary of pagesThis document comprises a front cover, a
11、n inside front cover, the EN title page, pages 2 to 21 and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsLicensed Copy: Wang Bin, na, Sun Oct 09 02:11:25 BST 2005, Uncontrolled Cop
12、y, (c) BSIEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 13463-6April 2005ICS 13.230English versionNon-electrical equipment for use in potentially explosiveatmospheres - Part 6: Protection by control of ignition source bAppareils non lectriques destins tre utiliss enatmosphres explosibles - Parti
13、e 6: Protection par contrlede la source dinflammation bNicht-elektrische Gerte fr den Einsatz inexplosionsgefhrdeten Bereichen - Teil 6: Schutz durchZndquellenberwachung bThis European Standard was approved by CEN on 15 March 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulat
14、ions 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 Europea
15、n 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 s
16、tandards 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 COM
17、MITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13463-6:2005: ELicensed Copy: Wang Bin,
18、 na, Sun Oct 09 02:11:25 BST 2005, Uncontrolled Copy, (c) BSIEN 13463-6:2005 (E) 2ContentsPage Foreword3Introduction .41 Scope 62 Normative references 73 Terms and definitions .74 Determination of suitability 75 Determination of the control parameters 86 Ignition prevention system design and setting
19、s 87 Ignition protection of sensors and actuators .98 Ignition prevention levels (IPL) of the ignition prevention system 99 Type tests .1110 Instructions for use .1111 Marking .12Annex A (informative) Flow diagram of the procedures described in this document .13Annex B (informative) Thought process
20、used to assign IPLs to different categories of equipment .14Annex C (informative) Background information on EN 954-1 and EN 6150815Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 94/9/EC16Bibliography 21Licensed Copy: Wang Bin, na, Su
21、n Oct 09 02:11:25 BST 2005, Uncontrolled Copy, (c) BSIEN 13463-6:2005 (E) 3Foreword This document (EN 13463-6:2005) 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 St
22、andard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by October 2005, and conflicting national standards shall be withdrawn at the latest by October 2005. This document has been prepared under a mandate given to CEN by t
23、he European Commission and the European Free Trade Association, and supports essential requirements of EU Directive 94/9/EC of 23 March 1994. For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. This document is to specify the requirements for
24、the type of protection “Control of ignition sources“ for equipment intended for use in potentially explosive atmospheres and should be used in conjunction with EN 13463-1 “ Non-electrical equipment for potentially explosive atmospheres Part 1: Basic method and requirements”. According to the CEN/CEN
25、ELEC 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, Mal
26、ta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: Wang Bin, na, Sun Oct 09 02:11:25 BST 2005, Uncontrolled Copy, (c) BSIEN 13463-6:2005 (E) 4Introduction Many types of non-electrical equipment intended for use in potentially
27、explosive atmospheres of gas, vapour, mist and/or combustible dust, do not contain an effective ignition source in normal operation. However, there is a risk that an ignition source might arise in such equipment if the moving parts suffer a malfunction or an abnormal operation occurs. An example of
28、this is a fan, having high speed rotating blades fixed to a shaft, supported on rolling element bearings, inside a stator. In normal operation, no frictional ignition sources should be present. However, because the clearances between the rotor and stator are very small, malfunctions such as the coll
29、apse of a shaft bearing, distortion of a rotating blade, build up of foreign material on a rotating blade, etc. could cause the clearance to be reduced and frictional sparking, or hot surfaces, to occur. To prevent potential ignition sources from becoming effective during normal operation, malfuncti
30、on and rare malfunction, it is possible to incorporate sensors into the equipment to detect impending dangerous conditions and initiate control measures at an early stage of deterioration before the potential sources are converted into effective sources. The control measures applied, may be initiate
31、d automatically, via direct connections between the sensors and the ignition prevention system, or manually, by providing a warning to the equipment operator (With the intention of the operator applying the ignition prevention measures e.g. by stopping the equipment). In this document, the incorpora
32、tion of such sensors and their associated automatic/manual ignition prevention measures, to prevent potential ignition sources becoming effective ignition sources, is known as protection by “Control of ignition source b ” This type of ignition protection, and the devices used to achieve it, can take
33、 many forms. In practice, they may be mechanical, electrical, optical, visual or a combination of all of these. Although this document deals with the ignition protection of non-electrical equipment, it nevertheless has to take account of the fact that an increasing amount of non-electrical equipment
34、 makes use of electrical sensors to detect and initiate the ignition prevention measures. It is therefore impossible to produce a non-electrical equipment protection standard without making reference to the use of electrical sensors and their associated ignition prevention system circuits. Some exam
35、ples of mechanical sensor / actuator devices are: a) fuseable plugs (as used in fluid couplings), that melt to release the energy contained in the power transmission fluid before the temperature of ignition capable parts exceed allowable limits; b) centrifugal speed governors, that directly control
36、the power throttle and prevent rotating parts attaining frictional ignition capable rotational speeds; c) thermostatic valves, that close to reduce the input energy, or open to increase the amount of coolant, thereby preventing ignition capable temperatures being attained; d) pressure relief valves
37、(using springs or weights), that open to limit pressure levels and consequent temperature rise during gas compression. Alternatively, to protect against catastrophic failure leading to the exposure of unintended hot surfaces. Some examples of combined electro-mechanical sensor / actuator devices are
38、: e) temperature, flow and level monitoring/control devices, that detect temperature / flow / level and initiate a solenoid valve to reduce the input energy, or increase the amount of coolant, f) optical pulse counters, that sense abnormal rotational speeds on the teeth of gears and send signals to
39、a speed controller, g) vibration sensors, that detect abnormal vibration, from e.g. rolling element bearings, before they fail (usually indicated by high frequency vibrations), or rotating parts that are becoming out of dynamic balance (usually indicated by low frequency vibrations), Licensed Copy:
40、Wang Bin, na, Sun Oct 09 02:11:25 BST 2005, Uncontrolled Copy, (c) BSIEN 13463-6:2005 (E) 5h) conveyor belt alignment devices, that detect unintended frictional rubbing between the moving belt and fixed parts of the supporting structure, i) power transmission belt tension devices, that detect fricti
41、onal slippage between the drive pulley and power transmission belt, due to loss of belt tension, j) wear detectors on clutches, which detect unacceptable wear likely to cause frictional heating by incorrect engagement of the clutch. Such sensor / actuator control devices may be either, continuously
42、active in normal operation of the equipment (e.g. to control the temperature of category 3 equipment), or be arranged so that they only detect abnormal operation (e.g. to detect impending dangerous over-temperature in category 2 equipment). As malfunction of any of the above sensors / actuator contr
43、ol devices, may result in failure to apply the appropriate ignition prevention measure, they are critical to the ignition safety related parts of the equipment. This ignition protection standard therefore calls for them to be assessed and suggests a minimum quality for such devices in the form of an
44、 ignition prevention level (IPL) that the equipment manufacturer must attempt to achieve. Thus, to meet the requirements of this document, the non-electrical equipment manufacturer is required to perform both the ignition hazard assessment (required by EN 13463-1), and additionally, an evaluation, t
45、o determine the ignition prevention level (IPL) necessary to ensure that the sensors / ignition prevention system function when they are called upon to contain the ignition risk within tolerable limits. A flow diagram is provided at Annex A (Figure A.1) to assist the non-electrical equipment manufac
46、turer follow the procedural stages described in this document. Licensed Copy: Wang Bin, na, Sun Oct 09 02:11:25 BST 2005, Uncontrolled Copy, (c) BSIEN 13463-6:2005 (E) 61 Scope This document specifies the requirements for the design and construction of equipment, intended for use in potentially expl
47、osive atmospheres, protected by the type of protection: Control of ignition source “b“. This document supplements the requirements in EN 13463-1, the contents of which also apply in full to equipment constructed in accordance with this document. Equipment conforming with the relevant clauses of this
48、 document meet the requirements for the following categories: Equipment Group I Category M2 that does not contain an ignition source arising from severe operating conditions, in particular arising from rough handling and changing environmental conditions in mines; Equipment Group II category 3 that
49、does not contain an ignition source in normal operation; Equipment Group II category 2G or 2D that does not contain an ignition source arising as a result of foreseeable malfunctions; Equipment Group II category 1G or 1D that does not contain an ignition source in normal operation, or under foreseeable malfunctions, or under rare malfunctions. NOTE The requirements for Group I, Category M1 equipment, are given in EN 50303, which specifies the requirements for both electrical and non-electrical equipment This type of protection can be used
