EN 50177:2009
(Main)Stationary electrostatic application equipment for ignitable coating powders - Safety requirements
Stationary electrostatic application equipment for ignitable coating powders - Safety requirements
1.1 This European Standard specifies the requirements for stationary electrostatic application equipment for ignitable coating powders to be used in explosive atmospheres generated by their own spray cloud. A distinction is made between spraying systems corresponding to EN 50050:2001 and spraying systems designed for higher discharge energies and/or currents. The charging of ignitable coating powder can be achieved by applying high voltage or triboelectrically. This European Standard also specifies the design-related requirements for a safe operation of the stationary equipment including its electrical installation. 1.2 This European Standard considers three types of electrostatic spraying systems; see 5.1 for more details. 1.3 This European Standard deals with all hazards significant for the electrostatic spraying of coating materials, 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 explosive atmosphere, and the protection of persons from electric shocks. 1.4 This stationary equipment is classified as equipment of group II, category 2D or category 3D for use in potentially explosive areas of zone 21 or 22, respectively. NOTE For other safety aspects like – zone classification of the areas in and around spray booths, see EN 12981:2005, 5.6.2.3; – zone classification of other areas with explosive atmosphere, see EN 60079-10-2; – selection, erection and application of other electrical and non electrical equipment in areas with explosion hazard, see EN 60079 14 and EN 12981:2005, 5.6.2.4; – health protection (for instance, noise) see also EN 12981:2005, 5.4 and EN 14462; – cleaning of spraying areas, see instruction manual of the spraying equipment; – fire prevention and protection (for instance fire hazards due to other sources) see also EN 12981:2005, 5.6; – explosion protection system, see EN 12981:2005, 5.6.2.5; – dust hazards, see EN 12981:2005, 5.5. Design-related measures for reducing the generation of noise of the stationary equipment for electrostatic coating are given in EN ISO 11688 1. See also EN 14462.
Stationäre Ausrüstung zum elektrostatischen Beschichten mit entzündbaren Beschichtungspulvern - Sicherheitsanforderungen
Matériels stationnaires de projection électrostatique de poudres de revêtement inflammables - Exigences de sécurité
Vgrajena oprema za elektrostatični nanos vnetljivega prahu za prevleke - Varnostne zahteve
Ta evropski standard opredeljuje zahteve za vgrajeno opremo za elektrostatični nanos gorljivega prahu za prevleke za uporabo v eksplozivnih atmosferah, ustvarjenih z njegovim lastnim oblakom razpršila. Razlikujemo med razpršilnimi sistemi, ki ustrezajo EN 50050:2001, in razpršilnimi sistemi, oblikovanimi za višje pretočne energije in/ali tokove. Do vžiga gorljivega prahu za prevleke lahko pride z uporabo visoke napetosti ali na triboelektrični način. Ta evropski standard prav tako opredeljuje oblikovne zahteve za varno delovanje vgrajene opreme, vključno z njeno električno napeljavo. Ta evropski standard upošteva tri tipe elektrostatičnih razpršilnih sistemov; za več podrobnosti glej točko 5.1. Ta evropski standard obravnava vse nevarnosti, značilne za elektrostatično razprševanje prevlek, ki lahko vsebuje tudi manjše količine dodanih kovinskih delcev, če je delo izvedeno pod pogoji po priporočilu proizvajalca. Zlasti to vključuje nevarnost vžiga, ki izhaja iz ustvarjene eksplozivne atmosfere, in varovanje oseb pred električnimi šoki. Ta vgrajena oprema je razvrščena kot oprema skupine II, kategorije 2D ali kategorije 3D za uporabo na potencialno eksplozivnih območjih cone 21 oziroma 22.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2010
1DGRPHãþD
SIST EN 50177:2007
9JUDMHQDRSUHPD]DHOHNWURVWDWLþQLQDQRVYQHWOMLYHJDSUDKX]DSUHYOHNH
9DUQRVWQH]DKWHYH
Stationary electrostatic application equipment for ignitable coating powder - Safety
requirements
Stationäre Ausrüstung zum elektrostatischen Beschichten mit entzünbaren
Beschichtungspulvern - Sicherheitsanforderungen
Matériels fixes de projection électrostatique de poudres de revêtement inflammables -
Exigences de sécurité
Ta slovenski standard je istoveten z: EN 50177:2009
ICS:
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
87.100 Oprema za nanašanje Paint coating equipment
premazov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 50177
NORME EUROPÉENNE
October 2009
EUROPÄISCHE NORM
ICS 87.100 Supersedes EN 50177:2006 + corr. Oct. 2007
English version
Stationary electrostatic application equipment
for ignitable coating powders -
Safety requirements
Matériels stationnaires de projection Stationäre Ausrüstung
électrostatique de poudres zum elektrostatischen Beschichten
de revêtement inflammables - mit entzünbaren Beschichtungspulvern -
Exigences de sécurité Sicherheitsanforderungen
This European Standard was approved by CENELEC on 2009-09-01. 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 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 Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia,
Slovenia, Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: Avenue Marnix 17, B - 1000 Brussels
© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50177:2009 E
Foreword
This European Standard was prepared by SC 31-8, Electrostatic painting and finishing equipment, of
Technical Committee CENELEC TC 31, Electrical apparatus for potentially explosive atmospheres.
The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50177 on
2009-09-01.
This European Standard supersedes EN 50177:2006 + corrigendum October 2007.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2010-09-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-09-01
This European Standard has been prepared under a mandate given to CENELEC by the European
Commission and the European Free Trade Association and covers essential requirements of
EC Directive 94/9/EC. See Annex ZZ.
CENELEC/TC 31 as the responsible committee has concluded that this new edition of EN 50177 does
not contain substantial changes regarding the ESRs.
The State of the Art is included in Annex ZY “Significant changes between this European Standard and
EN 50177:2006”.
___________
– 3 – EN 50177:2009
Contents
0 Introduction .4
0.1 Process .4
0.2 Explosion hazards .4
0.3 Electric hazards .4
1 Scope .6
2 Normative references .6
3 Definitions .7
4 General requirements .10
5 Requirements for the equipment .11
5.1 Electrostatic spraying systems .11
5.2 Requirements for spraying systems of category 3D .11
5.3 Special requirements for spraying systems of category 2D .13
5.4 Spraying area .13
5.5 High voltage supply .13
5.6 Electric requirements .14
5.7 Grounding measures .14
6 Testing .14
6.1 Tests of the high voltage cables .14
6.2 Tests of the stationary equipment .15
6.3 Specific test requirements for spraying systems of type B-P, type C-P category 2D .16
7 Information for use .17
7.1 General.17
7.2 Instruction manual .18
7.3 Marking .19
7.4 Warning sign .21
Bibliography .22
Annex ZY (informative) Significant changes between this European Standard and
EN 50177:2006 .23
Annex ZZ (informative) Coverage of Essential Requirements of EC Directives .24
Figures
Figure 1 – Test assembly according to 6.3.2 .17
Tables
Table 1 – Electrostatic spraying systems for ignitable coating powders – Fields of application .11
Table 2 – Requirements for electrostatic spraying systems of category 3D for ignitable coating
powders .11
Table 3 – Survey of tests .15
Table 4 – Test intervals .19
0 Introduction
0.1 Process
During the electrostatic coating process the coating powder is transported in an air stream from a
powder hopper up to an electrostatic spraying device. As the powder particles flow through the
spraying device they are electrostatically charged by means of a high voltage of the order of some tens
of kilovolts and ejected in the form of a cloud which is directed towards the workpiece. The charged
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 suction device or other means
in the powder collection 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
An explosion could occur, if
– the concentration of coating powder in air is within the explosion limits,
– an ignition source of appropriate energy for this coating powder cloud is present.
Ignition sources could be, for instance, a hot surface, an open flame, an electric arc or a spark.
An explosion could be prevented, if one – or better both – conditions are 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.
0.2.1 Mixtures of ignitable coating powder and air could only explode within a given range of
concentration, but not, if the concentration is above or below this range.
NOTE 1 If an explosive cloud of coating powder and air is trapped into a closed room, an explosion could lead to a fatal
increase of pressure.
NOTE 2 The particle size distribution of coating powders is usually in the range of 5 µm to 120 µm.
0.2.2 It is important that deposits of powder are not allowed to accumulate within the spraying areas
for 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 EN 12981:2005,
4.6].
0.2.3 Particular attention should be paid to the prevention of electrostatic charges on different
surfaces, which are in the vicinity of the powder cloud. This could apply to workpieces during the
coating process or the reciprocating devices and the mounting parts of the powder spraying system
etc.
0.3 Electric hazards
0.3.1 Electric shock (by direct or indirect contact) could be generated, for instance, by contact with
– live parts, which are not insulated for operational reasons,
– conductive parts, which are not under dangerous voltage during normal operation, but in case of
failure,
– insulated live parts whose insulation is insufficient or has been damaged due to mechanical
influences.
– 5 – EN 50177:2009
0.3.2 Inadequate grounding could occur, for instance, due to
– faulty connections to the protective grounding system,
– a too high resistance to ground.
0.3.3 Hazards could occur, for instance, if hazardous malfunctions (e.g. shortcut of the electronic
safety circuits, of access guards to dangerous areas or of warning devices) occur due to interferences
of the high voltage equipment and the components of control and safety systems.
0.3.4 Hazardous electrostatic discharges could be generated, for instance, by non-earthed
conductive components or by large insulating surfaces, especially if they are backed with conductive
material.
1 Scope
1.1 This European Standard specifies the requirements for stationary electrostatic application
equipment for ignitable coating powders to be used in explosive atmospheres generated by their own
spray cloud. A distinction is made between spraying systems corresponding to EN 50050:2001 and
spraying systems designed for higher discharge energies and/or currents. The charging of ignitable
coating powder can be achieved by applying high voltage or triboelectrically.
This European Standard also specifies the design-related requirements for a safe operation of the
stationary equipment including its electrical installation.
1.2 This European Standard considers three types of electrostatic spraying systems; see 5.1 for
more details.
1.3 This European Standard deals with all hazards significant for the electrostatic spraying of
coating materials, 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 explosive atmosphere, and the protection of persons from
electric shocks.
1.4 This stationary equipment is classified as equipment of group II, category 2D or category 3D
for use in potentially explosive areas of zone 21 or 22, respectively.
NOTE For other safety aspects like
– zone classification of the areas in and around spray booths, see EN 12981:2005, 5.6.2.3;
– zone classification of other areas with explosive atmosphere, see EN 60079-10-2;
– selection, erection and application of other electrical and non electrical equipment in areas with explosion hazard, see
EN 60079-14 and EN 12981:2005, 5.6.2.4;
– health protection (for instance, noise) see also EN 12981:2005, 5.4 and EN 14462;
– cleaning of spraying areas, see instruction manual of the spraying equipment;
– fire prevention and protection (for instance fire hazards due to other so
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.