EN 12921-3:2005+A1:2008

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 List of significant hazards
5 Safety requirements and/or measures
  5.1 General
  5.2 Mechanical hazards
  5.3 Safety requirements and measures against electrical
      hazards
  5.4 Safety requirements and measures against thermal
      hazards
  5.5 Safety requirements and measures against noise
  5.6 Safety requirements and measures against hazards
      generated by materials and substances processed,
      used or emitted by the cleaning machine
  5.7 Safety requirements and measures against hazard
      combinations
  5.8 Safety requirements and measures against failure of
      energy supply
  5.9 Safety measures against hazards related to failure of
      control systems
6 Verification of the safety requirements
  6.1 General
  6.2 Mechanical
  6.3 Electrical
  6.4 Thermal
  6.5 Noise
  6.6 Material and substances processed, used or emitted
      by the cleaning machines
  6.7 Hazard combinations
  6.8 Failure of energy supply
  6.9 Control systems
7 Information for use
  7.1 General
  7.2 Instruction handbook
  7.3 Marking
Annex A (normative) - Determination of inherently limited
        heating of cleaning machines
Annex B (informative) - Classification of flammable liquids
        according to Directive 67/548/EEC
Annex C (informative) - Area classification examples for
        cleaning machines using flammable cleaning liquids
Annex ZA (informative) - Relationship between this European
         Standard and the Essential Requirements of EU
         Directive 98/37/EC, amended by 98/79/EC
Annex ZB (informative) - Relationship between this European
         Standard and the Essential Requirements of EU
         Directive 2006/42/EC
Bibliography

This European Standard deals with the significant hazards of machines for surface cleaning and pre-treatment - in the following called "cleaning machines" - of industrial items using flammable cleaning liquids or a mixture of cleaning liquids, even in emulsion form, which can potentially create, even temporarily, a condition of flammability.This European Standard applies in combination with EN 12921-1. Both parts together cover all significant hazards relevant for cleaning machines of industrial items using liquids or vapours, when they are used as intended and under the conditions foreseen by the manufacturer (see Clause 4). The specific requirements specified in this European Standard take precedence over the respective requirements of EN 12921-1.To the extent of this document the terms combustible materials and flammable substance and explosive are equivalently used.NOTE 1The condition of flammability can be generated only when molecules of the fluid are in intimate contact with oxygen from the air. Ignition is possible when: the fluid generates a concentration of vapour in air, or: the flammable fluid is present as a suspension of fine droplets in air (aerosol).NOTE 2In practice, fires and explosions differ by the size and intensity of the reaction, and by the instantaneous effects on the environment.This European Standard does not apply to machinery and related equipment excluded from the scope of EN 12921-1.This European Standard is not applicable to cleaning machines of industrial items using flammable cleaning liquids which are manufactured before the publication of this European Standard by CEN.