《BS-EN-50176-1997.pdf》由会员分享，可在线阅读，更多相关《BS-EN-50176-1997.pdf（17页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS EN 50176:1997 Automatic electrostatic spraying installations for flammable liquid spraying material The European Standard EN 50176:1996 has the status of a British Standard ICS 87.100 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 02:16:02 GMT+00:00 2006, Uncontrolled Cop
2、y, (c) BSI BS EN 50176:1997 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 April 1997 BSI 12-1998 The following BSI references relate to the work on this standa
3、rd: Committee reference GEL/31/18 Draft for comment 90/34304 DC ISBN 0 580 27335 0 Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee GEL/31, Electrical apparatus for explosive atmospheres, to Subcommittee GEL/31/18, Electro
4、static spray guns, upon which the following bodies were represented: Association of British Mining Equipment Companies British Cable Makers Confederation British Gas Plc Confederation of United Kingdom Coal Producers Council for Electrical Equipment for Flammable Atmospheres (BEAMA) Department of Tr
5、ade and Industry (Standards Policy Unit) ERA Technology Ltd. Electric Trace Heating Industrial Council (ETHIC) Electrical Contractors Association Electroheat Manufacturers Association of BEAMA (EMAB) Energy Industries Council Engineering Equipment and Materials Users Association GAMBICA BEAMA Ltd. G
6、land Manufacturers Technical Committee Health and Safety Executive Institute of Petroleum Lighting Industry Federation Ltd. Loss Prevention Council Marine Safety Agency Ministry of Defence National Inspection Council for Electrical Installation Contracting Rotating Electrical Machines Association (B
7、EAMA Ltd.) Sira Limited United Kingdom Offshore Operators Association Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 02:16:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 50176:1997 BSI 12-1998i Contents Page Committees responsible
8、Inside front cover National forewordii Foreword2 Text of EN 5017633 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 02:16:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 50176:1997 ii BSI 12-1998 National foreword This British Standard has been prepared
9、 by Subcommittee GEL/31/18, and is the English language version of EN 50176:1996 Automatic electrostatic spraying installations for flammable liquid spraying material, published by the European Committee for Electrotechnical Standardization (CENELEC). A British Standard does not purport to include a
10、ll the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references Publication referred toCorresponding British Standard EN 344:1992BS EN 3
11、44:1993 Requirements and test methods for safety, protective and occupational footwear for professional use EN 50014:1992BS EN 50014:1992 Electrical apparatus for potentially explosive atmospheres. General requirements BS 6742 Electrostatic painting and finishing equipment using flammable materials
12、EN 50050:1986Part 1:1987 Specification for hand-held spray guns and associated apparatus EN 50053-1:1987Part 2:1987 Specification for selection, installation and use of hand-held paint spray guns (energy limit of 0,24 mJ) and associated apparatus EN 50053-2:1989Part 3:1990 Specification for selectio
13、n, installation and use of hand-held powder spray guns (energy limit of 5 mJ) and associated apparatus EN 50053-3:1989Part 4:1990 Specification for selection, installation and use of hand-held flock spray guns (energy limit of 0,24 or 0,5 mJ) and their associated apparatus EN 60529:1991BS EN 60529:1
14、992 Specification for degrees of protection provided by enclosures (IP code) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 10, an inside back cover and a back cover. This standard has been updated (see copyright date) and
15、 may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 02:16:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 50176 December 1996 ICS 87.1
16、00 Descriptors: Electric equipment, projection, flammable liquid, spray gun, explosive atmosphere, definition, specification, installation, electrical characteristic, high-voltage test, safety, explosion proofing, electrostatic protection, maintenance, marking English version Automatic electrostatic
17、 spraying installations for flammable liquid spraying material Installations automatiques de projection lectrostatique de produit projeter liquide inflammable Ortsfeste elektrostatische Sprhanlagen fr brennbare flssige Beschichtungsstoffe This European Standard was approved by CENELEC on 1996-10-01.
18、 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 national standards may be obtained
19、 on application to the Central Secretariat 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 own language and notified to the Central
20、Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CE
21、NELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1996 Copyright reserved to CENELEC members Ref. No. EN 50176:1996 E Licensed Copy: s
22、heffieldun sheffieldun, na, Mon Nov 06 02:16:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50176:1996 BSI 12-1998 2 Foreword This European Standard was prepared by SC 31-8, Electrostatic painting and finishing equipment, of Technical Committee CENELEC TC 31, Electrical apparatus for explosive atm
23、ospheres. It was revised, taking into account the comments received during the Unique Acceptance Procedure launched in December 1993 and was submitted to a second vote (3MV). The text of this draft was approved by CENELEC as EN 50176 on 1996-10-01. The following dates were fixed: Contents Page Forew
24、ord2 Introduction3 1Scope3 2Normative references3 3Definitions4 4General requirements5 5Installation requirements5 6High voltage tests8 7Cleaning and maintenance of spraying installations8 8Marking8 9Instruction manual9 Table 1 Minimum clearances in air7 latest date by which the EN has to be impleme
25、nted at national level by publication of an identical national standard (dop) 1997-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 1997-06-01 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 02:16:02 GMT+00:00 2006, Uncontrolled Copy, (c) BS
26、I EN 50176:1996 BSI 12-19983 Introduction In the process of electrostatic paint spraying, liquid is converted into a mist of droplets which are directed onto a surface in order to obtain an uniform layer of the thickness and type required. The droplets are charged by means of a high voltage of the o
27、rder of some tens of kilovolts so that they are attracted by and deposited on the earthed workpiece. 1 Scope 1.1 This European Standard specifies requirements for automatic electrostatic spraying installations which are used for spraying flammable liquids which may form explosive atmospheres in the
28、spraying area.In this connection distinction is made between spraying devices which due to their type of construction comply with requirements as laid down in EN 50050:1986 as applicable, and those for which other discharge energies and/or current limits are stipulated. It also specifies the constru
29、ctional requirements for the safe operational conditions of the electrical installations including ventilation requirements. Additional requirements as to the construction of the spraying areas such as cabins, booths, etc. are dealt with in other standards, currently in preparation in CEN/TC 271. 1.
30、2 This European Standard considers the following three broad classes of electrostatic spraying systems 1.3 This European Standard considers only the hazards being specific to the electrostatic characteristics of the electrostatic spraying process. 1.4 For other aspects, such as: classification of ha
31、zardous areas for example into zones; selection, installation and use of electrical equipment in hazardous areas; health hazards, for example toxic and skin effects; cleaning of spraying areas; fire hazards from external sources; storage and handling of flammable liquids outside of the electrostatic
32、 spraying installation; fire protection; explosion protection systems; where there are no harmonized European Standards then national regulations apply. 2 Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative refe
33、rences are cited at the appropriate places in the text and the publications are listed hereafter. 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
34、 latest edition of the publication referred to applies (including amendments). EN 344:1991, Requirements and test methods for safety Protective and occupational footwear for professional use. prEN 1127-1:1993, Safety of machinery Fire and explosions Part 1: Explosion prevention and protection. EN 50
35、014:1992, Electrical apparatus for potentially explosive atmospheres General requirements. EN 50050:1986, Electrical apparatus for potentially explosive atmospheres Electrostatic hand-held spraying equipment. EN 50053 series, Requirements for the selection, installation and use of electrostatic spra
36、ying equipment for flammable materials. EN 60529:1991, Degrees of protection provided by enclosures (IP Code) (IEC 529:1989). Type ASystems complying with EN 50050:1986 with a discharge energy limit of 0,24 mJ (see 5.1.1) In these systems there is no danger of either electric shock or incendive ener
37、gy. Type BSystems with a discharge energy limit in excess of 0,24 mJ but less than 350 mJ and a current limit of less than 0,7 mA (see 5.1.2) In these systems there is no danger of electric shock but there are dangers from incendive energy. Type CSystems with a discharge energy in excess of 350 mJ a
38、nd/or a current in excess of 0,7 mA (see 5.1.3) In these systems there are dangers of electric shock and from incendive energy. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 02:16:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50176:1996 4 BSI 12-1998 3 Definitions For the purpose of this
39、 European Standard, the following definitions apply: 3.1 electrostatic spraying device for liquid spraying material a device for producing, charging and depositing suspended droplets with the assistance of electric fields 3.2 electrostatic spraying system a system in general comprising electrostatic
40、 spraying devices, high voltage supply system and connecting cables 3.3 automatic electrostatic spraying installation an installation in which the spraying device is either permanently fixed or led by means of moving automatic devices (e.g. robots) the installation comprises in general the following
41、 items: spraying area; high voltage supply system; electrostatic spraying device; supply of spraying material; fixtures of the spraying devices; jigs/resp. fixtures of the workpieces; conveyors; earthing system; exhaust ventilation system; fire protection equipment; explosion protection device. 3.4
42、high voltage supply system voltage conversion unit comprising in general: low voltage section with devices for switching on and off the unit and for adjustment, control, regulation, limitation and monitoring of voltage and current; high voltage section for voltage conversion; high voltage switching
43、device; high voltage cables. 3.5 spraying area An area, closed or not, in which the spraying material is deposited onto the workpieces by the electrostatic spraying system. 3.5.1 enclosed spray cabin an area closed on all sides while spraying excluding openings for ingress and egress of the workpiec
44、es and ducts for ventilation 3.5.2 partly enclosed spray cabin an area closed on all sides while spraying excluding openings for ingress and egress of the workpieces, the automatic electrostatic spraying devices and ducts for ventilation 3.5.3 spray booth an area closed on all sides while spraying e
45、xcept on the side of the automatic electrostatic spraying devices and excluding openings for ingress and egress of the workpieces and ducts for ventilation 3.6 workpiece the article on which the spraying material is to be deposited 3.7 flammable liquid spraying material material which may be ignited
46、 by an effective source of ignition and which continues to burn after removal of the source of ignition or may react in the form of an explosion 3.8 explosive atmosphere a mixture with air, under atmospheric conditions, of flammable substances in the form of gas, vapour, mist, powder or flock, in su
47、ch proportions that it can be ignited by effective sources of ignition, such as excessive temperature, arcs or sparks (see prEN 1127-1) 3.9 lower explosion limit (LEL) the concentration of flammable gas, vapour, mist, powder or flock in air below which an explosive atmosphere will not be formed 3.10
48、 average concentration of flammable solvents in air the mass of flammable solvents introduced into the spraying area divided by the volume of air as extracted by the ventilation system during the same period of time Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 02:16:02 GMT+00:00 2006, Unco
49、ntrolled Copy, (c) BSI EN 50176:1996 BSI 12-19985 3.11 discharge energy the energy discharged from a conductive part of the installation in the form of a spark which could cause either electric shock to a person or an ignition of an explosive atmosphere 3.12 antistatic footwear footwear that has a resistance to earth, via the sole, which is low enough to prevent the build-up of electrostatic charges capable of an incendive discharge see EN 344 3.13 antistatic gloves gloves that have a resistance low enough to