CLC/SC 31-8 - Electrostatic painting and finishing equipment

1.1 This European Standard specifies requirements for automatic electrostatic flock application equipment which is designed for applying ignitable flock which may form explosive atmospheres in the flock application area. In this context a distinction is made between flock application devices which due to their type of construction comply with the requirements as laid down in EN 50050-3, as applicable, and those for which higher discharge energies are stipulated. This European Standard also specifies the constructional requirements for a safe operation of the stationary equipment of flock application booths, including the electrical installations and the accessories. This European Standard deals with all significant hazards, hazardous situations and events relevant to flock application booths, when they are used as intended and under conditions which are foreseeable as malfunction by the manufacturer (see Clause 4). 1.2 This European Standard considers three types of electrostatic flock systems. For more details, see Table 1. 1.3 This European Standard deals with those hazards occurring during stationary automatic electrostatic flocking. Among these hazards are, above all, ignition hazards of the generated explosive atmosphere and hazard to persons. 1.4 The stationary equipment dealt with in this European Standard is considered to be equipment of group II, category 3D for the use in areas with potential explosion hazards of zone 22. 1.5 This European Standard is not applicable for - flock systems in which mixtures of solvent vapours in air occur with a concentration of > 20 % of the LEL, - flock systems operated with AC voltage, - the application system for liquid or pasty substances (e.g. adhesives, primer), - the cleaning of flock application booths, - the storage and handling of ignitable substances outside the coating plant.

1.1 This European Standard specifies the requirements for hand-held or hand-operated electrostatic spraying equipment for ignitable flock 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 hazards significant for the electrostatic spraying of flock, 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. This European Standard specifies the design-related and test requirements for electrostatic spraying equipment of type A-F and type B-F according to Table 1 of EN 50223:2010. 1.2 Electrostatic applicators are considered to be equipment of group II, category 3D for use in potentially explosive areas of zone 22. All 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. NOTE 1 Solvent vapours which could be evaporated by workpieces coated with adhesives do not lead to a zone 2 in the flocking area. 1.3 In addition to the requirements above, the requirements of EN 1953 applies with regard to all other significant hazards relevant for applicators (e.g. health hazards, inadequate ergonomics). 1.4 This European Standard does not apply to  zone classification of the areas in and around spray booths [see EN 50223],  zone classification of other areas with potentially 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 50223],  cleaning of spraying areas, see instruction manual of the spraying equipment,  fire prevention and protection, for instance fire hazards due to other sources [see EN 50223],  explosion protection systems [see EN 50223],  dust hazards [see EN 12981]. NOTE 2 Noise is not considered to be a significant hazard for hand-held spraying equipment for ignitable flock.

1.1 This European Standard specifies the requirements for hand-held or hand-operated electrostatic spraying equipment for ignitable liquid coating materials to be used in explosive atmospheres generated by their own spray cloud within a temperature range from 5 °C to 40 °C. This European Standard deals with all hazards significant for the electrostatic spraying of liquid 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. This European Standard specifies the design-related and test requirements for electrostatic spraying equipment of type A-L according to Table 1 of EN 50176:2009. 1.2 With regard to explosion protection and prevention measures, this European Standard also applies to ionisators with high voltage corona charging. Ionisators in conformity with EN 50050-1 provide equipment category 2G. Parts of ionisators, which are intended to be used or installed in Zone 2, provide equipment category 3G in conformity with EN 50050-1, see Annex D. 1.3 Electrostatic applicators are considered to be equipment of group II, category 2G for use in potentially explosive areas of zone 1 or 2, which have been generated by the equipment itself. All other parts of hand-held electrostatic spraying equipment are considered to be equipment of category 3G if they are installed or used in potentially explosive areas of zone 2. 1.4 All other significant hazards relevant for applicators (e.g. ejection of fluids, mechanical strength, electrical hazards (apart from the electrostatic hazards), noise, explosion, contact 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 requirements 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 12215],  zone classification of other areas with potentially explosive atmosphere [see EN 60079-10-1],  selection, erection and application of other electrical and non-electrical equipment in areas with explosion hazard [see EN 60079 14 and EN 12215],  cleaning of spraying areas, see instruction manual of the spraying equipment,  fire prevention and protection, for instance fire hazards due to other sources [see EN 12215],  requirements for machinery for the supply and recirculation of coating material under pressure [see EN 12621]. 1.8 When processing coating materials having specific electrical properties (conductivity, resistivity) the function of the hand-held spraying equipment to charge coating materials electrostatically may be affected as a result of a voltage drop at the charging electrode.

2012-06-18 - Publication editing allocated to cpalagi@cencenelec.eu
2021: CLC legacy converted by DCLab NISOSTS

1.1 This European 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 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 explosive 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 charging. 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 equipment of category 3D if they are installed or used in potentially explosive areas of zone 22. 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 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, see Annex D. 1.4 All other significant hazards relevant for applicators (e.g. ejection of powder, mechanical strength, electrical hazards (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 requirements 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 60079-10-2],  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 spraying equipment,  fire prevention and protection, for instance fire hazards due to other sources [see EN 12981],  dust hazards [see EN 12981].

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.

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.

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 interfaces to and additional requirements for machinery according to EN 16985:2018, prEN 12621:2020 and prEN 1953:2020. 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 considers three types of spraying systems; see 5.1. Spraying systems are classified as equipment of group II, category 2G or category 3G. 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 spraying equipment used in food and pharmaceutical industry, additional requirements could apply. 1.6 This document is not applicable to: — liquid electrostatic application equipment for non ignitable liquid coating material, see EN 50348:2010 ; — electrostatic hand-held spraying equipment, see EN 50050 1:2013, EN 50050 2:2013 and EN 50050 3:2013 as well as prEN 50059:2021; — potential separation systems; — cleaning systems for spraying devices; — 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, ZB.11). 1.7 This document is not applicable to equipment manufactured before the date of its publication as a European Standard.

1.1 This European Standard specifies requirements for automatic electrostatic flock application equipment which is designed for applying ignitable flock which may form explosive atmospheres in the flock application area. In this context a distinction is made between flock application devices which due to their type of construction comply with the requirements as laid down in EN 50050 as applicable, and those for which higher discharge energies are stipulated. This European Standard also specifies the constructional requirements for a safe operation of the stationary equipment of flock application booths, including the electrical installations and the accessories. This European Standard deals with all significant hazards, hazardous situations and events relevant to flock application booths, when they are used as intended and under conditions which are foreseeable as malfunction by the manufacturer (see Clause 4). 1.2 This European Standard considers four types of electrostatic flock systems. For more details, see Table 1. 1.3 This European Standard deals with those hazards occurring during stationary automatic electrostatic flocking. Among these hazards are, above all, ignition hazards of the generated explosive atmosphere and hazard to persons. 1.4 The stationary equipment dealt with in this European Standard is considered to be equipment of group II, category 3D for the use in areas with potential explosion hazards of zone 22. 1.5 In cases of hybrid mixtures, the stationary equipment dealt with in this European Standard is also considered as equipment of group II, category 3G for the use in areas with potential explosion hazard of zone 2. 1.6 This European Standard is not applicable for - flock systems operated with AC voltage, - the application system for liquid or pasty substances (e.g. adhesives, primer), - the cleaning of flock application booths, - the storage and handling of ignitable substances outside the coating plant.

1.1 This European Standard specifies requirements for automatic electrostatic spraying equipment which are used for spraying flammable powders which create explosive atmospheres in the 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 50050:2006 as applicable, and those for which other discharge energies and/or current limits are stipulated. It also gives information on the safe operational conditions of the electrical equipment including ventilation requirements. Additional requirements as to the construction of the spraying areas such as cabins, booths, etc. are dealt with in EN 12981. 1.2 This European Standard considers the following three types of electrostatic spraying systems. Type A Systems complying with EN 50050:2006 with a discharge energy limit of 2 mJ (see 5.1.1) In these systems there is no danger of either electric shock or discharges of incendive energy. Type B Systems with a discharge energy in excess of 2 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 discharges of incendive energy. Type C Systems with a discharge energy in excess of 350 mJ and/or a current in excess of 0,7 mA (see 5.1.3) In these systems there are dangers of electric shock and from discharges of incendive energy. 1.3 This European Standard considers the hazards specific to explosive atmospheres created by the electrostatic spraying process. 1.4 The automatic electrostatic spraying equipment for flammable coating powders shall be constructed suitable for group II category 3 as defined in EN 60079-0. 1.5 This European Standard does not deal with matters of noise created by the equipment. For this item, the requirements are laid down in EN ISO 11688-1.

This European Standard specifies the constructional and test requirements for hand-held and hand-operated electrostatic spraying equipment and associated apparatus which can be used to spray flammable liquid coating materials, flammable coating powders or flammable flock creating explosive atmosphere in spraying areas which may or may not contain flammable adhesives. This standard only deals with the hazards involved in the coating process when hand-held electrostatic spraying equipment is used as prescribed and in accordance with the conditions which are to be expected according to the manufacturer. As to other hazards involved in the use of hand-held spraying equipment, the safety requirements of EN 1953:1998 shall be met. The spraying equipment shall be constructed suitable for group II category 2 as defined in EN 60079-0

With inclusion of agreed editorial corrections * Superseded by EN 50050:2006

This European Standard gives requirements for the selection, installation and safe use of hand-held electrostatic spray guns with an energy limit of 5 mJ and their associated apparatus complying with EN 50 050, which may cause an explosive atmosphere when spraying flammable coating powders. This European Standard considers only the hazards that are specific to the electrostatic characteristics of the electrostatic spraying process when the operator stands outside the booth when spraying. For other aspects such as classification of hazardous areas (e.g. classification into zones), selection, installation and use of electrical equipment in hazardous areas, health hazards (e.g. toxic and skin effects, electric shock), cleaning of powder spraying areas, fire hazard from external sources, storage and handling of flammable materials, explosion protection systems, national regulations apply

This European Standard gives requirements for the selection, installation and safe use of hand-held electrostatic flock spray-guns and their associated apparatus complying with EN 50 050 for the following cases when: flock spraying in association with adhesives which can form an explosive atmosphere, then the energy limit of the spray gun shall be 0.24 mJ; flock spraying in association with adhesives which do not form an explosive atmosphere, then the energy limit of the spray gun shall be 0.5 mJ. This European Standard considers only the hazards that are specific to the electrostatic characteristics of the electrostatic spraying process. For other aspects such as classification of hazardous areas (e.g. classification into zones), selection, installation and use of electrical equipment in hazardous areas, health hazards (e.g. toxic and skin effects, electric shock), cleaning of flock spraying areas, fire hazard from external sources, storage and handling of flammable materials, explosion protection systems, national regulations apply. Note: applications of flock spray guns used only in association with adhesives do not form an explosive atmosphere and where the ignition energy of flock is greater than 500 mJ are being considered by CENELEC/TC 104.

This European Standard gives requirements for the selection, installation and safe use of hand-held electrostatic spray guns with an energy limit of 0,24 mJ and their associated apparatus complying with EN 50 050, which may cause an explosive atmosphere when spraying flammable liquid. This European Standard considers only the hazards that are specific to the electrostatic characteristics of the electrostatic spraying process. For other aspects such as classification of hazardous areas (e.g. classification into zones), selection, installation and use of electrical equipment in hazardous areas, health hazards (e.g. toxic and skin effects, electric shock), cleaning of paint spraying areas, fire hazard from external sources, storage and handling of flammable liquids, national regulations apply

With addition of subclause 7.1.5

This European Standard specifies requirements for automatic electrostatic spraying installations which are used for spraying flammable coating powders which may form explosive atmospheres in the 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 constructional 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

This European Standard specifies requirements for automatic electrostatic spraying installations which are used for spraying flammable liquids which may form explosive atmospheres in the 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 constructional 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

This European Standard specifies the constructional and test requirements for hand-held and hand-operated electrostatic spray guns and associated apparatus which are used to spray paints, powders or flocks which may form explosive atmospheres. This European Standard also specifies requirements for hand-held spraying equipment used for spraying flocks on to surfaces coated with adhesives which may form potentially explosive atmospheres. Note: recommendations for the selection, installation and use of electrostatic spraying equipment for flammable materials are in course of preparation