BS EN 50223:2015 – TC:2020 Edition
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Tracked Changes. Stationary electrostatic application equipment for ignitable flock material. Safety requirements
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 128 |
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.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 74 | Contents |
| 76 | Foreword |
| 77 | Introduction |
| 78 | 1 Scope 2 Normative references |
| 80 | 3 Terms and definitions |
| 87 | 4 List of significant hazards 4.1 General 4.2 Mechanicalhazards 4.2.1 Hazards by shearing, crushing and drawing in 4.2.2 Entrapment hazard |
| 88 | 4.2.3 Slip, trip and fall hazards for persons 4.3 Electrical hazards 4.3.1 Electrical hazards resulting from dangerous electric body currents 4.3.2 Electrical hazards due to inappropriate grounding 4.3.3 Electrical hazards due to electrostatic discharges 4.4 Hazards generated by noise |
| 89 | 4.5 Hazards resulting from dangerous substances 4.6 Fire hazards 4.7 Explosion hazards 4.7.1 General explosion hazards |
| 90 | 4.7.2 Specific explosion hazards in enclosed spaces 4.8 Hazards by malfunctions of the control system 4.9 Hazards by failure of energy supply 5 Safety requirements and/or measures 5.1 General requirements for electrostatic flock application systems 5.2 Categorisation of electrostatic flock application systems |
| 91 | 5.3 Equipment requirements for flock application systems of category 3 5.3.1 General |
| 92 | 5.3.2 Distance between workpiece and flock application system 5.3.3 Safe disconnection of high voltage 5.3.3.1 General 5.3.3.2 Voltage-controlled and constant voltage operating mode |
| 93 | 5.3.3.3 Constant current operating mode 5.3.4 Protection against too high discharge energy 5.3.5 Protection against ignition of ignitable cleaning agents 5.3.6 Locally acting automatic fire extinguishing systems 5.3.7 Additional requirements during processing of flock material of cotton, artificial silk and comparable material |
| 94 | 5.4 Requirements for the high voltage supply 5.4.1 Safeguarding against unauthorized switching on 5.4.2 Protection against direct contact 5.4.3 Requirements for the feedback of the operating current 5.4.4 Requirements for the high voltage cable 5.4.5 Requirements for parts under high voltage 5.4.6 Minimum distance between the parts under high voltage and grounded parts 5.5 Requirements for the flock application booth 5.5.1 Protective measures against mechanical hazards 5.5.1.1 Protective measures against shearing, crushing and drawing-in |
| 95 | 5.5.1.2 Protective measures against entrapment 5.5.1.3 Protective measures against slip, trip and fall of operators |
| 96 | 5.5.2 Protective measures against electrical hazards 5.5.2.1 Protection against contact 5.5.2.2 Grounding measures 5.5.2.3 Propagating brush discharges 5.5.2.4 Protective measures against external influences on the electrical equipment 5.5.3 Protective measures against noise |
| 97 | 5.5.4 Protective measures against hazards by dangerous substances 5.5.4.1 Protective measures against contact with/inhalation of flock 5.5.4.2 Protective measures against inhalation of solvent vapours 5.5.4.3 Performance of the forced ventilation 5.5.4.4 Protective measures against inhalation of dangerous vapours and gases released by the fire extinguishing system |
| 98 | 5.5.5 Fire protection requirements 5.5.5.1 General 5.5.5.2 Materials of construction 5.5.5.3 Fire detection and extinguishing systems |
| 99 | 5.5.6 Explosion prevention requirements 5.5.6.1 General 5.5.6.2 Limitation of the concentration of ignitable substances 5.5.6.3 Prevention or reduction of ignition sources |
| 101 | 5.5.6.4 Electrical equipment 5.5.6.5 Non electrical equipment 5.5.6.6 Antistatic floor 5.5.6.7 Prevention of external ignition sources brought into explosive atmospheres 5.5.7 Safety devices and control systems 5.5.7.1 General |
| 102 | 5.5.7.2 Monitoring of ventilation performance loss 5.5.7.3 Interlocking of forced ventilation and flock application system 5.5.7.4 Protective measures against external influences on the safety devices and control systems 5.5.8 Explosion protection design measures |
| 103 | 5.5.9 Protection measures in case of failure of energy supply 6 Testing 6.1 Type test of the high voltage cables 6.2 Routine tests of the stationary equipment |
| 105 | 6.3 Testing of the requirements for the flock application booth 6.3.1 General 6.3.2 Testing the measures taken to prevent mechanical hazards (5.5.1) 6.3.3 Testing the measures taken to prevent electrical hazards (5.5.2) 6.3.3.1 Safety measures against contact 6.3.3.2 Protective measures regarding grounding 6.3.3.3 Propagating brush discharges 6.3.4 Testing the protective measures against noise |
| 106 | 6.3.5 Testing the protective measures against dangerous substances 6.3.5.1 Testing the protective measures against hazards due to flock and solvent vapours 6.3.5.2 Testing the protective measures against inhalation of dangerous gases and vapours emitted by the fire extinguishing equipment 6.3.6 Testing the fire prevention measures 6.3.6.1 Testing the materials of construction 6.3.6.2 Testing the fire warning and fire extinguishing system 6.3.7 Testing the explosion protection measures 6.3.7.1 Testing the concentration limits for ignitable flock 6.3.7.2 Verification of the prevention or reduction of ignition sources |
| 107 | 6.3.8 Verification of the additional explosion protection measures 6.3.9 Testing the protective measures in case of failure of energy supply 7 Information for use 7.1 General 7.2 Instruction manual 7.2.1 General information |
| 108 | 7.2.2 Operating instructions |
| 109 | 7.2.3 Information for maintenance 7.2.3.1 Preventive maintenance |
| 110 | 7.2.3.2 Repair 7.2.4 Cleaning and maintenance 7.2.5 Test intervals |
| 111 | 7.2.6 Additional information |
| 112 | 7.3 Marking of the flock application system 7.3.1 General 7.3.2 High voltage supply 7.3.3 Flock application systems |
| 113 | 7.3.4 Additional marking of equipment – Category 3 7.3.5 Warning sign 7.4 Marking of the flock application booth |
| 114 | Annex A (normative)Determination of the concentration of ignitable flock material in terms of LEL A.1 Calculation |
| 115 | A.2 Examples of calculation – Determination of concentration of ignitable flock material |
| 117 | Annex B (normative)Determination of concentration of organic solvents B.1 Calculation |
| 118 | B.2 Example for calculation – Determination of minimum exhaust volume flow based on a design concentration value |
| 119 | Annex C (informative)Classification of areas with potential explosion hazard |
| 120 | Annex D (informative)Example of marking |
| 121 | Annex ZY(informative)Significant changes between this European Standardand EN 50223:2010 |
| 123 | Annex ZZA(informative)Coverage of Essential Requirements of EU Directive 2006/42/EC |
| 124 | Annex ZZB(informative)Coverage of Essential Requirements of EU Directive 94/9/EC |
| 125 | Bibliography |
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BS EN 50223:2015
Stationary electrostatic application equipment for ignitable flock material. Safety requirements Published By Publication Date Number…
