1、BSI Standards PublicationBS EN 50050-2:2013Electrostatic hand-heldspraying equipment Safetyrequirements -Part 2: Hand-held spraying equipment forignitable coating powderCopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or
2、 networking permitted without license from IHS-,-,-BS EN 50050-2:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 50050-2:2013. Together with BS EN 50050-1:2013 and BS EN 50050-3:2013 it supersedes BS EN 50050:2006 which is withdrawn.The UK participation in
3、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 secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible f
4、or 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 Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standar
5、ds Policy and Strategy Committee on 31 March 2014.Amendments/corrigenda issued since publicationDate Text affectedCopyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS E
6、N 50050-2:2013EUROPEAN STANDARD EN 50050-2 NORME EUROPENNE EUROPISCHE 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
7、 - 1000 Brussels 2013 CENELEC - All rights of exploitation in any 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-h
8、eld spraying equipment for ignitable coating powder Equipement manuel de projection lectrostatique - Exigences de scurit - Partie 2: Equipement manuel de projection de poudre de revtement inflammable Elektrostatische Handsprheinrichtungen - Sicherheitsanforderungen - Teil 2: Handsprheinrichtungen fr
9、 entzndbares Beschichtungspulver This European Standard was approved 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-t
10、o-date lists and bibliographical references concerning such national 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 tra
11、nslation under the responsibility of a CENELEC member into its own 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,
12、 Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, 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. Copyr
13、ight British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50050-2:2013Contents Page Foreword . 3 0 Introduction 4 0.1 Process . 4 0.2 Explosion hazards . 4 0.3 Electric hazard
14、s . 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 corona charging . 11 4.3 Requirements for the accessories
15、 . 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 6.1 General . 15 6.2 Instruction manual. 15 6.3 Marki
16、ng 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 . 21 B.2 Preparations . 21 B.3 Preliminary test 21 B.4 Te
17、st 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 protection and prevention for ionisators . 25 Annex ZY (i
18、nformative) 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 ionisators 25 EN 50050-2:2013Copyright British Standards I
19、nstitution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50050-2:2013Foreword This document (EN 50050-2:2013) has been prepared by SC 31-8, “Electrostatic painting and finishing equipment“, of CLC/T
20、C 31, “Electrical apparatus for potentially explosive atmospheres“. The following dates are fixed: latest date by which this document 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 standard
21、s conflicting with this document have to be withdrawn (dow) 2016-10-14 In combination with EN 50050-1:2013 and EN 50050-3:2013, 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
22、 CEN shall not be held responsible for identifying any or all such patent rights. This document has been prepared under a mandate 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
23、Directive(s) see informative Annex ZZ, which is an integral part of this document. EN 50050-2:2013Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50050-2:20130
24、Introduction 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 volt
25、age in the 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 rem
26、oved by a 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 concentrati
27、on of coating 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 condi
28、tion is avoided. 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 concentratio
29、n above the 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 ai
30、r is not evenly 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 f
31、or they may 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.
32、 0.2.4 Particular 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 conduct
33、ive objects 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
34、 operation, 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. contamina
35、tion by coating powder). EN 50050-2:2013Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50050-2:20130.3.3 Hazards could occur, for instance, if hazardous malfun
36、ctions (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 electrostatic discharges could be generated, for instance, by non-earthed conductive components or by large insulating s
37、urfaces, especially if they are backed with conductive material. EN 50050-2:2013Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50050-2:20131 Scope 1.1 This Eur
38、opean Standard specifies the requirements for hand-held or hand-operated electrostatic 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
39、 hazards significant for the electrostatic spraying of coating powders, which 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 explosiv
40、e atmosphere. This European Standard specifies the design-related and test 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 chargi
41、ng. Ionisators used together with or under similar conditions as electrostatic 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 equipmen
42、t of category 3D if they are installed or used in potentially explosive areas 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
43、 other parts of hand-held electrostatic spraying equipment are considered 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 hazar
44、ds (apart from the electrostatic hazards), noise, explosion, contract with 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 re
45、quirements may be applicable to equipment designed for use in food and pharmaceutical 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
46、-10-2, selection, erection and application of other electrical and non-electrical 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 sourc
47、es see EN 12981, dust hazards see EN 12981. EN 50050-2:2013Copyright British Standards Institution Provided by IHS under license with BSI - Uncontrolled Copy Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-BS EN 50050-2:20132 Normative references The following docu
48、ments, 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 amendments) 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 requirements EN 50177:2009 Stationary electrostati
