EN 50176:2009
(Main)Stationary electrostatic application equipment for ignitable liquid coating material - Safety requirements
Stationary electrostatic application equipment for ignitable liquid coating material - Safety requirements
1.1 This European Standard specifies the requirements for stationary electrostatic application equipment for ignitable liquid coating materials and for hard to ignite liquid coating materials to be used in explosive atmospheres generated by their own spray cloud. A distinction is made between spraying systems corresponding to EN 50050 and spraying systems designed for higher discharge energies and/or currents. 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 four 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 2G or category 3G for use in potentially explosive areas of zone 1 or 2, respectively. NOTE For other safety aspects like – zone classification of the areas in and around spray booths, see EN 12215:2004, 5.7.2.3; – zone classification of other areas with explosive atmosphere, see EN 60079-10-1; – selection, installation and application of other electrical and non electrical equipment in areas with explosion hazard, see EN 60079-14 and EN 12215:2004, 5.7.2.5; – health protection (for instance, noise), see also EN 12215:2004, 5.5 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 12215:2004, 5.7.1. 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 flüssigen Beschichtungsstoffen - Sicherheitsanforderungen
Matériels stationnaires de projection électrostatique de produit liquide de revêtement inflammable - Exigences de sécurité
Vgrajena oprema za elektrostatični nanos vnetljivih tekočin za prevleke - Varnostne zahteve
Ta evropski standard opredeljuje zahteve za vgrajeno opremo za elektrostatični nanos vnetljivih tekočin za prevleke in za težko vnetljive tekočine za prevleke za uporabo v eksplozivnih atmosferah, ustvarjenih z njihovim lastnim oblakom razpršila. Razlikujemo med razpršilnimi sistemi, ki ustrezajo EN 50050 in razpršilnimi sistemi, oblikovanimi za višje pretočne energije in/ali tokove. Ta evropski standard prav tako opredeljuje oblikovne zahteve za varno delovanje vgrajene opreme, vključno z njeno električno napeljavo. 1.2 Ta evropski standard upošteva štiri tipe elektrostatičnih razpršilnih sistemov; za več podrobnosti glej točko 5.1. 1.3 Ta evropski standard obravnava vse nevarnosti, značilne za elektrostatično razprševanje prevlek, ki lahko vsebujejo 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. 1.4 Ta vgrajena oprema je razvrščena kot oprema skupine II, kategorije 2G ali kategorije 3G za uporabo na potencialno eksplozivnih območjih cone 1 oziroma 2.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
01-januar-2010
1DGRPHãþD
SIST EN 50176:1998
9JUDMHQDRSUHPD]DHOHNWURVWDWLþQLQDQRVYQHWOMLYLKWHNRþLQ]DSUHYOHNH
9DUQRVWQH]DKWHYH
Stationary electrostatic application equipment for ignitable liquid coating material - Safety
requirements
Stationäre Ausrüstung zum elektrostatischen Beschichten mit entzündbaren flüssigen
Beschichtungsstoffen - Sicherheitsanforderungen
Matériel stationaire de projection électrostatique de produit à projeter liquide inflammable
- Exigences de sécurité
Ta slovenski standard je istoveten z: EN 50176:2009
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 50176
NORME EUROPÉENNE
October 2009
EUROPÄISCHE NORM
ICS 87.100 Supersedes EN 50176:1996
English version
Stationary electrostatic application equipment
for ignitable liquid coating material -
Safety requirements
Matériels stationnaires de projection Stationäre Ausrüstung
électrostatique de produit liquide zum elektrostatischen Beschichten
de revêtement inflammable - mit entzündbaren flüssigen
Exigences de sécurité Beschichtungsstoffen -
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 50176:2009 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 50176 on
2009-09-01.
This European Standard supersedes EN 50176:1996.
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 50176 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 50176:1996”.
___________
– 3 – EN 50176:2009
Contents
0 Introduction .4
0.1 Process .4
0.2 Explosion hazards .4
0.3 Electric hazards .4
1 Scope .5
2 Normative references .5
3 Definitions .6
4 General requirements .9
5 Requirements for the equipment .10
5.1 Electrostatic spraying systems .10
5.2 Requirements for spraying systems of category 3G .11
5.3 Special requirements for spraying systems of category 2G .12
5.4 Spraying area .13
5.5 High voltage supply .13
5.6 Electric requirements .14
5.7 Grounding measures .14
5.8 Supply for coating material .14
6 Testing .15
6.1 Tests of the high voltage cables .15
6.2 Test of the insulating spraying material supply hose.15
6.3 Tests of the stationary equipment .15
6.4 Specific test requirements for spraying systems of type B-L, type C-L or type D-L
category 2G .17
7 Information for use .18
7.1 General.18
7.2 Instruction manual .18
7.3 Marking .19
7.4 Warning sign .21
Annex A (informative) Ignitability of water-based paints .22
Bibliography .24
Annex ZY (informative) Significant changes between this European Standard and
EN 50176:1996 .25
Annex ZZ (informative) Coverage of Essential Requirements of EC Directives .26
Figure
Figure 1 – Test assembly according to 6.4.2 .17
Tables
Table 1 – Electrostatic spraying systems for ignitable and hard to ignite liquid coating materials –
Fields of application .10
Table 2 – Requirements for electrostatic spraying systems of category 3G for ignitable and hard
to ignite liquid coating materials .11
Table 3 – Survey of tests .15
Table 4 – Test intervals .19
0 Introduction
0.1 Process
During the electrostatic coating process the liquid coating material is transported to an electrostatic
spraying device where it is converted to droplets by mechanical forces and by the influence of an
electric field. During this atomising process the droplets are charged by high voltage of some 10 kV
and a spray cloud is generated. The charged droplets are attracted by and applied to the earthed
workpiece.
Droplets, which are not applied to the workpiece (overspray) are removed by a suction device or by
other means.
After the coating process the coated workpieces are introduced into a dryer where the solvent is
evaporated and a dry film of coating material is generated.
0.2 Explosion hazards
An explosion could occur, if
– the concentration of sprayed liquid ignitable coating materials in air is within the explosion limits,
– an ignition source of appropriate energy for this explosive atmosphere 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 explosive atmosphere.
0.2.1 Mixtures of ignitable coating materials and air could only explode within a given range of
concentration, but not, if the concentration is above or below this range.
NOTE If an explosive mixture of coating materials and air is trapped in a closed room, an explosion could lead to a fatal
increase of pressure.
0.2.2 Particular attention should be paid to the prevention of electrostatic charges on different
surfaces, which are in the vicinity of the spray cloud. This could apply to workpieces during the coating
process or the reciprocating devices and the mounting parts of the 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.
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 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.
– 5 – EN 50176:2009
1 Scope
1.1 This European Standard specifies the requirements for stationary electrostatic application
equipment for ignitable liquid coating materials and for hard to ignite liquid coating materials to be used
in explosive atmospheres generated by their own spray cloud. A distinction is made between spraying
systems corresponding to EN 50050 and spraying systems designed for higher discharge energies
and/or currents.
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 four 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 2G or category 3G
for use in potentially explosive areas of zone 1 or 2, respectively.
NOTE For other safety aspects like
– zone classification of the areas in and around spray booths, see EN 12215:2004, 5.7.2.3;
– zone classification of other areas with explosive atmosphere, see EN 60079-10-1;
– selection, installation and application of other electrical and non electrical equipment in areas with explosion hazard, see
EN 60079-14 and EN 12215:2004, 5.7.2.5;
– health protection (for instance, noise), see also EN 12215:2004, 5.5 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 12215:2004, 5.7.1.
Design-relat
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