EN 50176:2025

Automatic electrostatic application systems for ignitable liquid coating materials - Safety requirements

1.1 This document specifies the electrical requirements for the design of automatic electrostatic application systems for liquid coating materials which can be ignited in an atomised state, used within a temperature range from 5 °C to 40 °C. This document considers automatic electrostatic application systems for processing ignitable liquid coating materials, where the conductivity of the complete system is limited up to 50 nS/cm. Together with additional measures like e.g. potential separation systems, these requirements can also be applied to ignitable liquid coating materials, where the conductivity of the complete system is limited up to 2 000 μS/cm. Ignition hazards related to the generated explosive atmosphere and the protection of persons against electric shock are considered. 1.2 This document specifies — requirements for an interface to machinery according to EN 16985:2018, — additional requirements for machinery covered by EN 1953:— and EN 12621:— . 1.3 This document also specifies requirements for a safe operation of electrostatic application systems, including the electrical installation. The requirements consider both the processing of coating materials and the cleaning and purge processes. 1.4 This document applies to three types of spraying systems; see 5.1.1. Spraying systems are classified as equipment of group II, category 2G (for intended use in zone 1 or zone 2) or category 3G (for intended use in zone 2). Only electrostatic spraying systems operating with a d.c. sinusoidal ripple of not more than 10 % of the r.m.s. value are considered. 1.5 For electrostatic application systems used in food and pharmaceutical industry, additional requirements may apply. 1.6 This document does not apply to — potential separation systems; — selection, installation and application of other electrical and non-electrical equipment in areas with explosion hazard, see EN 60079-14:2014 and EN 16985:2018; — quality assurance systems for electrostatic spraying equipment (see EN ISO/IEC 80079-34:2020, Annex ZB.11).

Automatische elektrostatische Beschichtungssysteme für entzündbare Beschichtungsstoffe - Sicherheitsanforderungen

1.1 Dieses Dokument legt elektrische Anforderungen für die Konstruktion automatischer elektrostatischer Sprühsysteme zur Verarbeitung flüssiger Beschichtungsstoffe fest, die im zerstäubten Zustand entzündbar sind und in einem Temperaturbereich zwischen 5°C und 40°C verwendet werden. Diese Norm behandelt automatische elektrostatische Beschichtungsstoffe, bei denen die Leitfähigkeit des Gesamtsystems auf bis zu 50 nS/cm begrenzt ist. Zusammen mit zusätzlichen Maßnahmen wie z.B. Potentialtrennsystemen können diese Anforderungen auch auf entzündbare flüssige Beschichtungsstoffe angewandt werden, bei denen die Leitfähigkeit des Gesamtsystems auf bis zu 2 000 μS/cm begrenzt ist. Dabei werden Zündgefahren für die entstehende explosionsfähige Atmosphäre und der Schutz von Personen gegen elektrischen Schlag berücksichtigt. 1.2 Dieses Dokument legt Anforderungen an Schnittstellen zu Maschinen nach EN 16985:2018, EN 12621:2021 and EN 1953:2021 sowie zusätzliche Anforderungen an diese Maschinen fest. 1.3 Dieses Dokument legt auch die Anforderungen für den sicheren Betrieb elektrostatischer Sprühsysteme einschließlich der elektrischen Installationen fest. Die Anforderungen berücksichtigen neben der Verarbeitung von Beschichtungsstoff auch Reinigungs- und Spülprozesse. 1.4 Dieses Dokument berücksichtigt drei Typen von Sprühsystemen, siehe 5.1. Sprühsysteme gelten als Geräte der Gruppe II, Kategorie 2G oder Kategorie 3G. Es werden nur elektrostatische Sprühsysteme mit Gleichstrom mit einer sinusförmigen Welligkeit von höchstens 10 % des Effektivwertes berücksichtigt. 1.5 Für elektrostatische Sprühsysteme in der Nahrungsmittel- und Pharmaindustrie können zusätzliche Anforderungen gelten. 1.6 Dieses Dokument gilt nicht für - elektrostatische Sprühsysteme für nichtentzündbare flüssige Beschichtungsstoffe, siehe EN 50348:2010 + Cor.:2010; - elektrostatische Handsprüheinrichtungen, siehe EN 50050:2013 Teile 1 bis 3, und EN 50059:2021; - Potenzialtrennsysteme; - Reinigungssysteme für Sprüheinrichtungen; - Auswahl, Errichtung und Anwendung von anderen elektrischen und nicht elektrischen Betriebsmitteln in explosionsgefährdeten Bereichen, siehe EN 60079-14:2014 und EN 16985:2018; - Qualitätssicherungssysteme für elektrostatische Sprühsysteme (siehe EN ISO/IEC 80079-34:2020, Anhang ZB 11). 1.7 Diese Europäische Norm gilt nicht für Einrichtungen, die vor dem Datum ihrer Veröffentlichung als Europäische Norm hergestellt wurden.

Systèmes automatiques d’application électrostatique de matériaux de revêtement inflammables - Exigences de sécurité

1.1 Le présent document spécifie les exigences électriques pour la conception des systèmes automatiques d’application électrostatique de matériaux liquides de revêtement qui peuvent être enflammés lorsqu’ils sont pulvérisés, utilisés dans une plage de température de 5 °C à 40 °C. Le présent document traite des systèmes automatiques d’application électrostatique pour l’application de matériaux liquides de revêtement inflammables pour lesquels la conductivité de l’ensemble du système est limitée à 50 nS/cm. Outre des mesures supplémentaires, par exemple des systèmes de séparation de potentiel, ces exigences peuvent également s’appliquer aux matériaux liquides de revêtement inflammables, si la conductivité de l’ensemble du système est limitée à 2 000 μS/cm. Les risques d’inflammation relatifs à l’atmosphère explosive générée et la protection des personnes contre les chocs électriques sont traités. 1.2 Le présent document spécifie les exigences relatives aux interfaces et les exigences supplémentaires relatives aux machines conformément à l’EN 16985:2018, au prEN 12621:2020 et au prEN 1953:2020. 1.3 Le présent document spécifie également des exigences relatives au fonctionnement sûr des systèmes d’application électrostatique, y compris leur installation électrique. Les exigences portent à la fois sur le traitement des matériaux de revêtement et sur les processus de nettoyage et de purge. 1.4 Le présent document traite de trois types de systèmes de projection, voir 5.1. Les systèmes de projection sont classés comme appareil de Groupe II, catégorie 2G ou catégorie 3G. Seuls les systèmes de projection électrostatique fonctionnant avec une ondulation sinusoïdale en courant continu ne dépassant pas 10 % de la valeur efficace sont concernés. 1.5 Pour les appareils de projection électrostatique utilisés dans l’industrie alimentaire et dans l’industrie pharmaceutique, des exigences supplémentaires peuvent s’appliquer. 1.6 Le présent document n’est pas applicable: - aux appareils de projection électrostatique de matériau liquide de revêtement ininflammable, voir EN 50348:2010 1; - aux matériels manuels de projection électrostatique, voir EN 50050-1:2013, EN 50050-2:2013 et EN 50050-3:2013, ainsi que prEN 50059:2021; - aux systèmes de séparation de potentiel; - aux systèmes de nettoyage pour dispositifs de projection; - à la sélection, à l’installation et à l’application des autres appareils électriques ou non électriques dans les emplacements à risque d’explosion, voir EN 60079-14:2014 et EN 16985:2018; - aux systèmes d’assurance qualité pour les appareils de projection électrostatique (voir EN ISO/IEC 80079-34:2020, ZB.11). 1.7 Le présent document ne s’applique pas aux appareils fabriqués avant la date de sa publication en tant que Norme européenne.

Avtomatska oprema za elektrostatični nanos vnetljivih premazov - Varnostne zahteve

General Information

• Status: Not Published
• Publication Date: 13-Feb-2025
• ICS: 87.100 - Paint coating equipment
• Technical Committee: CLC/TC 31 - Electrical apparatus for explosive atmospheres - General requirements
• Drafting Committee: CLC/SC 31-8 - Electrostatic painting and finishing equipment
• Current Stage: 5060 - Voting results sent to TC, SR - Formal Approval
• Start Date: 22-Nov-2024
• Completion Date: 22-Nov-2024
• Directive: 2006/42/EC - Directive 2006/42/EC of the European Parliament and of the Council of 17 May 2006 on machinery, and amending Directive 95/16/EC (recast)
• Directive: 2014/34/EU - Directive 2014/34/EU Of The European Parliament And Of The Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to equipment and protective systems intended for use in potentially explosive atmospheres (recast)
• Mandate: M/396 - Mandate to CEN and Cenelec for standardisation in the field of machinery
• Mandate: M/596 - [C(2023)4798] Commission Implementing Decision of 20.7.2023 on a standardisation request as regards equipment and protective systems intended for use in potentially explosive atmospheres in support of Directive 2014/34/EU (ATEX) of the European Parliament and of the Council
• Mandate: M/BC/CEN/92/46 - Standardization mandate assigned to CEN/CENELEC concerning equipment and protective systems intended for use in potentially explosive atmospheres
• Ref Project: kSIST prEN 50176:2024 - Automatic electrostatic application systems for ignitable coating materials - Safety requirements

Relations

• Revises: EN 50176:2009 - Stationary electrostatic application equipment for ignitable liquid coating material - Safety requirements
• Effective Date: 10-Mar-2020

Standards Content (Sample)

SLOVENSKI STANDARD
oSIST prEN 50176:2021
01-maj-2021
Avtomatska oprema za elektrostatični nanos vnetljivih premazov - Varnostne
zahteve
Automatic electrostatic application systems for ignitable coating materials - Safety
requirements
Automatische elektrostatische Beschichtungssysteme für entzündbare
Beschichtungsstoffe - Sicherheitsanforderungen
Systèmes automatiques de projection électrostatique de produit liquide de revêtement
inflammable - Exigences de sécurité
Ta slovenski standard je istoveten z: prEN 50176
ICS:
29.260.20 Električni aparati za Electrical apparatus for
eksplozivna ozračja explosive atmospheres
87.100 Oprema za nanašanje Paint coating equipment
premazov
oSIST prEN 50176:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 50176:2021
oSIST prEN 50176:2021
EUROPEAN STANDARD DRAFT
prEN 50176
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2021
ICS  Will supersede EN 50176:2009 and all of its
amendments and corrigenda (if any)
English Version
Automatic electrostatic application systems for ignitable coating
materials - Safety requirements
Systèmes automatiques de projection électrostatique de Automatische elektrostatische Beschichtungssysteme für
produit liquide de revêtement inflammable - Exigences de entzündbare Beschichtungsstoffe -
sécurité Sicherheitsanforderungen
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2021-06-04.

It has been drawn up by CLC/SC 31-8.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CENELEC 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 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 71657 Ref. No. prEN 50176 E

oSIST prEN 50176:2021
prEN 50176:2021 (E)
Contents Page
European foreword . 4
Introduction . 6
3.1 Terms and definitions . 9
3.2 List of abbreviations .12
4.1 Explosion hazards .13
4.2 Electric hazards .13
5.1 Requirements for spraying systems depending on the type .14
5.1.1 General .14
5.1.2 Requirements for ignition protection .14
5.1.3 Prevention of hazardous discharges .15
5.1.4 Prevention of hazardous discharges during rinsing and cleaning processes .15
5.1.5 Automatic fire extinguishing system .16
5.1.6 Prevention of electric shock .16
5.2 Requirements for all types of spraying systems.18
5.2.1 Definition of safety relevant values .18
5.2.2 Reliability of parts under high voltage .18
5.2.3 High-voltage cables .18
5.2.4 Minimum distances to live parts .18
5.2.5 Electrical safety .18
5.2.6 Maximum surface temperature .18
5.2.7 Safeguard against unauthorised switch-on and switch-off .18
5.2.8 Safeguard against modification of safety relevant parameters .19
5.3 Coating material supply system .19
5.3.1 General .19
5.3.2 Requirements for ignition protection .19
5.3.3 Prevention of hazardous discharges .19
5.3.4 Hose to the material supply under high voltage .19
5.3.5 Cleaning of coating material supply pipes and hoses .19
5.3.6 Cleaning of insulating coating material supply pipes and hoses with a cleaning liquid-air-
mixture .19
5.4 Requirements for the control system .20
5.4.1 General .20
5.4.2 Requirements for control systems of category 3G .20
5.5 Environment in which the application system is used .21
5.5.1 General .21
5.5.2 Measures against high-energy discharges .21
5.5.3 Lock of openings .21
5.5.4 Indication of high voltage .21
5.5.5 Earthing .21
6.1 Tests depending on the type of spraying systems .21
6.1.1 General .21
6.1.2 Ignition protection .21
6.1.3 Hazardous discharges .21
6.1.4 Hazardous discharges during rinsing and cleaning processes .22
6.1.5 Automatic fire extinguishing system (routine test) .22
6.1.6 Prevention of electric shock .22
6.2 Tests for all types of spraying systems .22
6.2.1 Measurement of safety relevant values (routine test) .22
6.2.2 Test of the reliability (type test).23
6.2.3 Tests of the high-voltage cables (type test) .23
6.2.4 Minimum distances of live parts (routine test) .23
6.2.5 Electrical safety (type test) .23
6.2.6 Maximum surface temperature (type test) .23
6.2.7 Safeguard against unauthorised switch-on (type test) .23
6.2.8 Safeguard against modification of safety relevant parameters (type test) .23
6.3 Test of the coating material supply system .23
oSIST prEN 50176:2021
prEN 50176:2021 (E)
6.3.1 General . 23
6.3.2 Tests of ignition protection (type test) . 23
6.3.3 Tests of measures preventing hazardous discharges (type test) . 23
6.3.4 Test of the coating material supply hose with material under high voltage (type test) . 24
6.3.5 Tests of safety of cleaning procedure (type test) . 24
6.3.6 Tests of safety of cleaning procedure for pipes and hoses with a cleaning liquid-air-mixture
(type test) . 24
6.4 Test of the control system . 24
6.4.1 General (routine test) . 24
6.4.2 Test for control systems of category 3G (type test) . 24
6.5 Test of requirements on the environment . 24
6.5.1 General . 24
6.5.2 Measures against high-energy discharges. 24
6.5.3 Guards on openings . 24
6.5.4 Indication of high voltage . 24
6.5.5 Earthing . 24
7.1 General . 25
7.2 Instruction for use . 25
7.2.1 General . 25
7.2.2 Information on installation . 25
7.2.3 Information on operation . 25
7.2.4 Cleaning, maintenance, and corrective maintenance . 26
7.2.5 Test intervals . 26
7.3 Marking . 27
7.3.1 General . 27
7.3.2 Spraying devices as ATEX equipment of category 3 . 27
7.3.3 Spraying devices as ATEX equipment of category 2 . 27
7.3.4 Control systems as ATEX equipment without own category connected to produ
...