EN 50050-2-2013 en Electrostatic hand-held spraying equipment - Safety requirements - Part 2 Hand-held spraying equipment for ignitable coating powder.pdf

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1、BSI Standards PublicationBS EN 50050-2:2013Electrostatic hand-heldspraying equipment Safetyrequirements -Part 2: Hand-held spraying equipment forignitable coating powderBS EN 50050-2:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 50050-2:2013. Together wit

2、h BS EN 50050-1:2013 and BS EN 50050-3:2013 it supersedes BS EN 50050:2006 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee EXL/31/-/1, Electrostatic spray guns.A list of organizations represented on this committee can be obtained on request to its secr

3、etary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 75856 0ICS 29.260.20; 87.100Compliance with a British Standar

4、d cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2014.Amendments/corrigenda issued since publicationDate Text affectedBS EN 50050-2:2013EUROPEAN STANDARD EN 50050-2 NORME EUROPENNE EUROP

5、ISCHE NORM November 2013 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels 2013 CENELEC - All rights of exploitation in an

6、y form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50050-2:2013 E ICS 87.100 Supersedes EN 50050:2006 (partially) English version Electrostatic hand-held spraying equipment - Safety requirements - Part 2: Hand-held spraying equipment for ignitable coating powder Equipement m

7、anuel de projection lectrostatique - Exigences de scurit - Partie 2: Equipement manuel de projection de poudre de revtement inflammable Elektrostatische Handsprheinrichtungen - Sicherheitsanforderungen - Teil 2: Handsprheinrichtungen fr entzndbares Beschichtungspulver This European Standard was appr

8、oved by CENELEC on 2013-10-14. CENELEC 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 nati

9、onal standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC 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 CENELEC member into its o

10、wn language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedoni

11、a, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 50050-2:2013Contents Page Foreword . 3 0 Introduction 4 0.1 Pro

12、cess . 4 0.2 Explosion hazards . 4 0.3 Electric hazards . 4 1 Scope 6 2 Normative references 7 3 Terms and definitions . 8 4 Requirements for hand-held spraying equipment for ignitable coating powders 11 4.1 General requirements . 11 4.2 Special requirements for hand-held spraying equipment with cor

13、ona charging . 11 4.3 Requirements for the accessories . 12 5 Tests . 12 5.1 General . 12 5.2 General tests 12 5.3 Conditioning test . 13 5.4 Tests for electrical safety (not applicable to triboelectrical applicators) 13 5.5 Ignition test 14 5.6 Tests of the accessories . 14 6 Information for use 15

14、 6.1 General . 15 6.2 Instruction manual. 15 6.3 Marking of electrostatic hand-held spraying equipment and associated control devices 17 Annex A (normative) Test for ignition protection using a shunt and an oscilloscope 20 Annex B (normative) Ignition test within the gas mixture . 21 B.1 General . 2

15、1 B.2 Preparations . 21 B.3 Preliminary test 21 B.4 Test 22 B.5 Result 22 Annex C (informative) Quality assurance systems for electrostatic spraying equipment 23 C.1 General . 23 C.2 Electrical assembly . 23 C.3 Mechanical assembly 24 C.4 Tests . 24 Annex D (normative) Requirements for explosion pro

16、tection and prevention for ionisators . 25 Annex ZY (informative) Significant changes between this European Standard and EN 50050:2006 26 Annex ZZ (informative) Coverage of Essential Requirements of EU Directives . 28 Bibliography 29 Tables Table 1 Test intervals . 17 Table D.1 Requirements for ioni

17、sators 25 EN 50050-2:2013BS EN 50050-2:2013Foreword This document (EN 50050-2:2013) has been prepared by SC 31-8, “Electrostatic painting and finishing equipment“, of CLC/TC 31, “Electrical apparatus for potentially explosive atmospheres“. The following dates are fixed: latest date by which this doc

18、ument has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2014-10-14 latest date by which the national standards conflicting with this document have to be withdrawn (dow) 2016-10-14 In combination with EN 50050-1:2013 and EN 50050-3:2013,

19、this document supersedes EN 50050:2006. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandat

20、e given to CENELEC by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this document. EN 50050-2:2013BS EN 50050-2:20130 Introducti

21、on 0.1 Process During the electrostatic coating process the coating powder is transported in an air stream, or by air, from a powder hopper or other container, up to an applicator. As the powder particles are passing the applicator they are electrostatically charged by means of a high voltage in the

22、 range of some tens of kilovolts or triboelectrically and ejected in the form of a cloud which is directed towards the workpiece. The charged powder particles of the cloud are attracted by and applied to the earthed workpiece. Powder, that is not applied to the workpiece (overspray) is removed by a

23、exhaust ventilation system or other means and transported into the powder recovery unit. After the coating process the workpieces are introduced into an oven where the powder is melted and cured into a coherent coating. 0.2 Explosion hazards 0.2.1 An explosion can occur, if the concentration of coat

24、ing powder in air is above the lower explosion limit, an ignition source of appropriate energy for this coating powder cloud is present. Ignition sources could be, for instance, a hot surface, a naked flame, an electric arc or a spark. An explosion could be prevented, if at least one condition is av

25、oided. Because it is very difficult to exclude the possibility of ignitable discharges completely, the main focus should be the prevention of ignitable concentrations of coating powder in air. 0.2.2 Deflagration of explosive atmospheres is only possible within a given range of concentration above th

26、e lower explosion limit. NOTE 1 If an explosive cloud of coating powder and air is trapped into a closed room, an explosion can lead to a fatal increase of pressure. NOTE 2 The particle size distribution of coating powder is usually in the range of 5 m to 120 m. NOTE 3 Coating powder in air is not e

27、venly distributed inside a given volume, therefore it is possible that a part of the mixture is within the ignitable concentration range. An upper limit is safety-related not applicable. 0.2.3 It is important that deposits of powder are not allowed to accumulate within the spraying areas for they ma

28、y be whirled up and give rise to an explosive atmosphere. This does not apply to deposits on filter devices and accumulations of coating powder in hoppers where filters and hoppers are integrated in the spraying area and are designed to collect the coating powder. See 4.6 of EN 12981:2005. 0.2.4 Par

29、ticular attention should be paid to the prevention of electrostatic charges on different surfaces located in the vicinity of the powder cloud. This could apply to e.g. workpieces during the coating process. Grounding is very critical to the prevention of electrostatic charge to any conductive object

30、s in the spray area. 0.3 Electric hazards 0.3.1 Electric shock (by direct or indirect contact) can be generated, for instance, by contact with null live parts, which are not insulated for operational reasons, null conductive parts, which are not connected to dangerous voltage during normal operation

31、, but only in case of failure, null insulated live parts with insufficient or damaged insulation due to external impact. 0.3.2 Inadequate earthing may occur, for instance, due to null faulty connections to the protective earthing system, null a too high resistance to earth (e. g. contamination by co

32、ating powder). EN 50050-2:2013BS EN 50050-2:20130.3.3 Hazards could occur, for instance, if hazardous malfunctions (e.g. shortcut of electronic safety circuits) occur due to interferences of the high voltage equipment and the components of the control and safety systems. 0.3.4 Hazardous electrostati

33、c discharges could be generated, for instance, by non-earthed conductive components or by large insulating surfaces, especially if they are backed with conductive material. EN 50050-2:2013BS EN 50050-2:20131 Scope 1.1 This European Standard specifies the requirements for hand-held or hand-operated e

34、lectrostatic spraying equipment for ignitable coating powders within a temperature range from 5 C to 40 C to be used in explosive atmospheres generated by their own spray cloud. This European Standard deals with all electrical hazards significant for the electrostatic spraying of coating powders, wh

35、ich could also contain small quantities of added metal particles, if the work is carried out under conditions recommended by the manufacturer. In particular, this includes ignition hazards resulting from the generated explosive atmosphere. This European Standard specifies the design-related and test

36、 requirements for electrostatic spraying equipment of type A-P according to Table 1 of EN 50177:2009. 1.2 With regard to explosion protection and prevention measures, this standard also applies to ionisators with corona charging. Ionisators used together with or under similar conditions as electrost

37、atic spraying equipment for ignitable coating powders are considered to be equipment of group II, category 2D for use in potentially explosive areas of zone 21 or 22. All other parts of ionisators are considered to be equipment of category 3D if they are installed or used in potentially explosive ar

38、eas of zone 22, see Annex D. 1.3 Electrostatic applicators are considered to be equipment of group II, category 2D for use in potentially explosive areas of zone 21 or 22, which have been generated by the equipment itself. All other parts of hand-held electrostatic spraying equipment are considered

39、to be equipment of category 3D if they are installed or used in potentially explosive areas of zone 22. 1.4 All other significant hazards relevant for applicators (e.g. ejection of powder, mechanical strength, electrical hazards (apart from the electrostatic hazards), noise, explosion, contract with

40、 or inhalation of dangerous substances, ergonomics) are covered by EN 1953. 1.5 This European Standard also gives details regarding quality assurance systems for electrostatic spraying equipment, see Annex C. 1.6 Additional requirements may be applicable to equipment designed for use in food and pha

41、rmaceutical industry. 1.7 This European Standard does not apply to zone classification of the areas in and around spray booths see EN 12981, zone classification of other areas with potentially explosive atmosphere see EN 60079-10-2, selection, erection and application of other electrical and non-ele

42、ctrical equipment in areas with explosion hazard see EN 60079-14 and EN 12981, cleaning of spraying areas, see instruction manual of the spray booth, fire prevention and protection, for instance fire hazards due to other sources see EN 12981, dust hazards see EN 12981. EN 50050-2:2013BS EN 50050-2:2

43、0132 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any am

44、endments) applies. EN 1149-5 Protective clothing Electrostatic properties Part 5: Performance requirements EN 1953 Atomising and spraying equipment for coating materials Safety requirements EN 12981:2005 Coating plants Spray booths for application of organic powder coating material Safety requiremen

45、ts EN 50177:2009 Stationary electrostatic application equipment for ignitable coating powders Safety requirements EN 60079-0 Explosive atmospheres - Electrical apparatus for explosive gas atmospheres Part 0: General requirements (IEC 60079-0) EN 60079-7:2007 Explosive atmospheres Part 7: Equipment p

46、rotection by increased safety “e“ (IEC 60079-7:2006) EN 60204-1 Safety of machinery Electrical equipment of machines Part 1: General requirements (IEC 60204-1) EN 60529 Degrees of protection provided by enclosures (IP code) (IEC 60529) EN 61340-4-1 Electrostatics Part 4-1: Standard test methods for

47、specific applications Electrical resistance of floor coverings and installed floors (IEC 61340-4-1) EN 62061 Safety of machinery Functional safety of safety-related electrical, electronic and programmable electronic control systems (IEC 62061) EN ISO 12100 Safety of machinery - General principles fo

48、r design - Risk assessment and risk reduction (ISO 12100) EN ISO 13849-1 Safety of machinery - Safety-related parts of control systems - Part 1: General principles for design (ISO 13849-1) EN ISO 20344 Personal protective equipment Test methods for footwear (ISO 20344) EN 50050-2:2013BS EN 50050-2:2

49、0133 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 hand-held spraying equipment hand-held or hand-operated equipment for electrostatic coating using ignitable coating powders, generally comprising the following parts: applicator (with corona charging or triboelectric charging); coating powder supply system; control device; high voltage supply system for corona charging (can be integral to the applicator); connecting cable 3.2 connecting c