1、BRITISH STANDARD BS EN 13463-8:2003 Non-electrical equipment for potentially explosive atmospheres Part 8: Protection by liquid immersion k The European Standard EN 13463-8:2003 has the status of a British Standard ICS 13.230 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology,
2、Mon Jul 23 10:15:12 GMT+00:00 2007, Uncontrolled Copy, (c) BSIBS EN 13463-8:2003 This British Standard, was published under the authority of the Standards Policy and Strategy Committee on 15 January 2004 BSI 15 January 2004 ISBN 0 580 43251 3 National foreword This British Standard is the official E
3、nglish language version of EN 13463-8:2003. The UK participation in its preparation was entrusted to Technical Committee FSH/23, Fire precautions in industrial and chemical plant, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its
4、 secretary. Cross-references The 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
5、Catalogue or 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 underst
6、and the text; 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 pages This document comprises
7、a front cover, an inside front cover, the EN title page, pages 2 to 15 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Licensed Copy: Institute Of Technology Tallaght, Instit
8、ute of Technology, Mon Jul 23 10:15:12 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN134638 September2003 ICS13.230 Englishversion Nonelectricalequipmentforpotentiallyexplosiveatmospheres Part8:Protectionbyliquidimmersionk Appareilsnonlectriquesdestinstre
9、utilissen atmosphresexplosiblesPartie8:Protectionpar immersiondansunliquidek NichtelektrischeGertefrdenEinsatzin explosionsgefhrdetenBereichenTeil8:Schutzdurch Flssigkeitskapselungk ThisEuropeanStandardwasapprovedbyCENon1August2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhic
10、hstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,
11、French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hunga
12、ry,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyfo
13、rmandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN134638:2003E Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Jul 23 10:15:12 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 13463-8:2003 (E) 2 Contents page Foreword3 Introduction .4 1 Scope5 2 Normative ref
14、erences5 3 Terms and definitions .5 4 Determination of suitability 6 5 Determination of the maximum/minimum criteria6 6 Protective liquid.6 7 Equipment construction .7 8 Type tests and requirements for enclosures8 8.1 General8 8.2 Increased pressure test on enclosed equipment having a sealed enclosu
15、re that contains static, or flowing protective liquid .8 8.3 Overpressure test on enclosed equipment having a vented enclosure 8 9 Documentation and instructions8 9.1 General8 9.2 Technical documentation conforming to the requirements of directive 94/9/EC .9 10 Marking.9 Annex ZA (informative) Claus
16、es of this European Standard addressing essential requirements or other provisions of EU Directives 10 Bibliography 15 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Jul 23 10:15:12 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 13463-8:2003 (E) 3 Foreword This document
17、(EN 13463-8:2003) 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 tex
18、t or by endorsement, at the latest by March 2004, and conflicting national standards shall be withdrawn at the latest by March 2004. 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
19、 EU Directive(s). For relationship with EU Directive(s), see informative Annex ZA, which is an integral part of this document. This standard is to specify the requirements for the type of protection “Liquid immersion“ for equipment intended for use in potentially explosive atmospheres and should be
20、used in conjunction with EN 13463-1 “ Non-electrical equipment for potentially explosive atmospheres - Part 1: Basic method and requirements”. The detailed drafting work was entrusted to Working Group 2 “Equipment for use in potentially explosive atmospheres“. According to the CEN/CENELEC Internal R
21、egulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain,
22、 Sweden, Switzerland and the United Kingdom. Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Jul 23 10:15:12 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 13463-8:2003 (E) 4 Introduction Certain types of non-electrical equipment, intended for use in potentially explosive
23、 atmospheres of gas, vapour and/or dust, have their potential ignition sources rendered ineffective by either submersing them in a protective liquid, or by continuously coating them with a flowing film of protective liquid. In some equipment, the protective liquid is provided solely for the purpose
24、of preventing the potential ignition sources from becoming effective. In other equipment, the protective liquid serves additional purposes, such as lubricating and/or cooling moving parts, or as in the case of hydraulic systems, for transmitting energy. In some equipment, the protective liquid may b
25、e the actual process liquid itself. Examples of the kinds of equipment utilising this type of ignition protection are: a) oil immersed disc brakes, for example, on the wheels of vehicles used in potentially explosive atmospheres, b) diaphragm and other submersible pumps used for delivering flammable
26、 liquids, having their moving mechanisms immersed below the lowest allowable level of the flammable liquid being processed (e.g. petroleum product dispensers), c) hydraulic pumps and motors having their internal rotating parts continuously immersed in the flowing hydraulic fluid used to transmit the
27、 hydrostatic or hydrokinetic energy, d) oil filled gearboxes, having their gear wheels partially immersed, but continuously coated by a viscous film of lubricating oil. In this example the protective oil coating may be supplied by natural splashing of the wheels as they rotate in the oil, or by dire
28、cting a continuously flowing stream of oil directly onto them from an oil pump in the gearbox sump, e) fluid couplings, torque converters, connected for example, between the output shaft of a driving motor and the input shaft of fully loaded machine, to allow it to be started gradually (soft startin
29、g). In all of the above, ignition protection is achieved by the fact that protective liquid prevents the surrounding explosive atmosphere from coming into contact with the ignition source(s) by continuously coating, and/or lubricating and cooling the moving parts. A similar type of ignition protecti
30、on, known as oil immersion ”o”, has been used for many years for electrical equipment, where, in addition to the above, the liquid also acts as an electrical insulating medium. It is for this latter reason that this standard cannot be applied to electrical equipment, because it allows the use of liq
31、uids that conduct electricity. Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Jul 23 10:15:12 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 13463-8:2003 (E) 5 1 Scope 1.1 This European Standard specifies the requirements for the design, construction, testing and marking
32、 of ignition protected equipment using liquid immersion k as a means of preventing potential ignition sources from becoming effective according to the category, or categories, of the equipment to which it is constructed. 1.2 It may be used to provide ignition protection, either as an independent mea
33、ns, in addition to, or in combination with, other types of ignition protection listed in EN 13463-1 for Group I, categories M1 and M2 and Group II, categories 1G, 1D, 2G, 2D, 3G and 3D equipment, according to the ignition hazard assessment. 1.3 This European Standard supplements the requirements of
34、EN 13463-1 insofar as it applies to the protection of non-electrical equipment by liquid immersion k. 1.4 This European Standard does not apply to the ignition protection of electrical equipment. For these requirements reference should be made to EN 50014 and EN 50015, which inter-alia, requires ele
35、ctrically non- conducting protective liquids to be used. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter.
36、 For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 13463-1:2001, N
37、on-electrical equipment for potentially explosive atmospheres Part 1: Basic method and requirements. EN 60529, Degree of protection provided by enclosures (IP code) (IEC 60529:1989.) 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 13463-1 and
38、 the following apply. 3.1 liquid immersion k a type of protection in which potential ignition sources are made ineffective or separated from the explosive atmosphere by either totally immersing them in a protective liquid, or by partially immersing and continuously coating their active surfaces with
39、 a protective liquid in such a way that an explosive atmosphere which may be above the liquid, or outside the equipment enclosure cannot be ignited. 3.2 protective liquid a liquid which prevents the explosive atmosphere from making direct contact with potential ignition sources and thereby ensures i
40、t cannot be ignited. 3.3 equipment with a sealed enclosure totally enclosed equipment that prevents the ingress of an external atmosphere during the expansion and contraction of the internally contained protective liquid during use in service. Such equipment includes any pipework associated with it
41、and may contain an over pressure relief device. 3.4 equipment with a vented enclosure totally enclosed equipment that allows the ingress and egress of an external atmosphere through a breathing device or constricted opening during the expansion and contraction of the internally contained protective
42、fluid during normal operation. Such equipment includes any pipework associated with it. Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Mon Jul 23 10:15:12 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN 13463-8:2003 (E) 6 3.5 open equipment equipment that has its components o
43、r is itself immersed in a protective liquid that is open to the external atmosphere. For example, an open top vessel with immersed moving components. Such equipment includes any pipework associated with it. 4 Determination of suitability 4.1 Before a decision is made to protect equipment or parts of
44、 equipment for use as an assembly, including interconnecting parts, by the measures described in this standard, it shall have been subjected to the ignition hazard assessment in accordance with 5.2 of EN 13463-1:2001. 4.2 The requirements specified in EN 13463-1 shall be complied with except where s
45、pecifically excluded by this standard. 5 Determination of the maximum/minimum criteria 5.1 The manufacturer of the equipment shall determine by calculation and/or by type testing the following maximum/minimum criteria: the maximum and minimum level, or if more appropriate, the maximum and minimum pr
46、essure or flow of the protective liquid; the maximum working angle to the horizontal of the equipment; the maximum and minimum viscosity of the protective liquid, unless the nature of the protective liquid is specified by the manufacturer; required to ensure that the designated potential ignition so
47、urces, are either totally immersed, or continuously coated with sufficient protective liquid, to ensure they cannot become effective. Account shall be taken of the effects of contraction during starting surges, splashing, turbulence, churning of the liquid, the worst case filling condition and stand
48、still of the equipment throughout the normal range of operating temperatures. 5.2 Where the ignition protection is achieved by partial immersion and a pumped, or directed flow of liquid provides the necessary continuous coating on the potential ignition sources, the manufacturer shall determine the most effective location of any nozzle, spray or coating device to give maximum protection. 5.3 The results of the calculation, or type tests, described above, shall be included in the manufacturers technical documentation; the minimum/maximum criteri
