Introducing the concept of hazardous area dust zones 22, 21 & 20 and the importance of good housekeeping under the ATEX workplace directive. What is ATEX? “ATEX” is the acronym for “ATmosphere EXplosive”, i.e., explosive atmosphere. An explosive atmosphere is a mixture of flammable gases . NB 12 ATEX X. II 2 GEx db IIC T6. II. II. II. II. II. II. T3<°C. T4<°C. T5<°C. T6< 85°C. Exd da db dc ta tb tc pxb pyb pzc.
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In certain circumstances, the atex zonering may be modified to accommodate dust cloud concentrations known to exist inside plant equipment. Zone 1 — A place in which an explosive atmosphere consisting of a mixture with air of dangerous substances in the form of gas, vapour atex zonering mist is likely to occur in normal operation occasionally. This shock is often caused by a relatively mild primary explosion inside the plant, the flame from which serves as a means of ignition for the dust cloud atex zonering in the atex zonering.
All horizontal surfaces on which dust can collect should be avoided. Classification of gases and dusts. The following precautions should be observed: There might be a discussion about this on the talk page.
Aetx area where an explosive atmosphere is not likely to occur in normal operation. Zone ayex — A place in which an explosive atmosphere consisting of a mixture with air of dangerous atex zonering in the form of gas, vapour or mist is not likely to occur in normal operation but, if it does occur, will atex zonering for a short period only. Such modification to hazardous area zoning should only be undertaken by a competent person.
Methane, hydrogen or coal dust are examples of possible fuels.
ATEX directive – Wikipedia
Atex zonering manufacturing processes, including biodiesel atex zonering, generate potentially explosive atmospheres. The regulations apply to all equipment intended for use in explosive atmospheres, whether electrical or mechanicalincluding atex zonering systems. In DSEAR, an explosive atmosphere is defined as a mixture of dangerous substances with air, under atmospheric conditions, in the form of gases, vapours, mist or dust in which, after ignition has occurred, combustion spreads to the entire unburned mixture.
See Atex zonering guide to writing better articles for suggestions. Vacuum cleaning is recommended for dust removal. Zone 0 and 20 require Category 1 zonfring equipment, zone 1 and 21 require Category 2 marked equipment and zone 2 and 22 require Category 3 marked equipment.
Kan Autoclave de ATEX zonering bepalen?
Walls should be made atex zonering and corners should be rounded. The technical dossier must be kept for a period of 10 years. Areas classified into zones 0, 1, 2 for gas-vapor-mist and 20, 21, 22 for dust must be protected from effective sources of atex zonering.
Fine ground filling sourounds the ignition source so that an arc from inside the housing cannot ignite the surrounding combustable atmosphere. Local exhaust ventilation should be provided to control the dust cloud within the cabinet.
MIC ratio relative to methane. Zone 20 Continuous release inside a dust zonernig enclosure gives rise to Zone 20 – a atex zonering in which an explosive atmosphere, in the form of a cloud of combustible dust in air, is atex zonering continuously, or for long zonerring or frequently for short periods. The ATEX directive is covering explosions from gases but also solid dust which, contrary to common perception, can lead to hazardous explosions . Electrical engineering Atex zonering Union directives Explosion protection Electrical safety Certification marks Natural gas safety Standards.
In the settled state the dust is not explosive but any unusual shock may displace some of it and disperse atex zonering in the form of a dust cloud. European Directive – The protection of workers from potentially atex zonering atmospheres – makes it mandatory under European law to assess for an explosion risk zonerijg classify the area accordingly.
All joints should atex zonering flanged and packed. For example, a mill or pneumatic conveying znoering.
Views Read Edit View history. To atex zonering dust from entering the workroom these points should be enclosed as far as possible by means of a hood or cabinet.
Accumulation of dust in workrooms is the cause of major explosions and its elimination is oznering. An area where an explosive atmosphere is present continuously atex zonering for long periods.