HazardEx - The top ten myths of dust zoning.

Zone 20: A place in which an explosive atmosphere in the form of a cloud of combustible dust in air is present continuously, or for long periods or frequently. Zone 21: A place in which an explosive atmosphere in the form of a cloud of combustible dust in air is likely to occur in normal operation occasionally. Zone 22.

Cat.3 zone 22 A place in which an explosive atmosphere in the form of a cloud of combustible dust in air is not likely to occur in normal operation but, if it does occur, will persist for a short period only. NANO Ex and NEO-Ex are in fact certified for such zones according to the norms IEC 60079-0:2011 - EN 60079-31:2014 by a notified body.

ATEX Hazardous Area Control Stations Zone 22 - Zone 20.

Ex ec and Ex tc motors (Zone 2 and Zone 22) MENZEL offers you a wide selection of low, medium and high voltage motors for potentially gas and dust explosive industrial areas. MENZEL Ex ec (former Ex nA) and Ex tc motors are used in potentially explosive industrial environments around the world, and must therefore sufficiently meet the highest standards for the safety of man, machine, and the.Type of Dust Zone 20 Zone 21 Zone 22 Non-Conductive tD A20 tD B20 iaD maD tD A20 or tD A21 tD B20 or tD B21 iaD or ibD maD or mdB pD tD A20; tD A21 or tD A22 tD B 20; tD B21 or tD B22 iaD or ibD maD or mbD pD Conductive tD A20 tD B20 iaD maD tD A20 or tD A21 tD B20 or tD B21 iaD or ibD maD or mdB pD tD A20 or tD A21 or tD A22 IP6X tD B 20 or tD B21 iaD or ibD maD or mbD pD Table 3: Apparatus S.Gas dust i mining M1 Very high Protection - - Operatable in Ex atmosphere M2 High Protection - - De-energised in Ex atmosphere ii industrial 1 Very high Protection G Zones 0,1,2 D Zones 20,21,22 2 High Protection G Zones 1,2 Zones 21,22 3 Normal Protection G Zone 2 D Zone 22 ppArATUS GroUpS ANd mpE rATU E clASSES for commoN EXplo SivE GASES ANd.


This level of risk is represented by classifying the hazardous area as Zone 0, Zone 1 or Zone 2 (for gas, vapour and mist atmospheres) or Zone 21 or Zone 22 for dust atmospheres. In this article we will look at what defines Zone 0, Zone 1 and Zone 2 hazardous area classifications and the considerations for specifying lighting into each area.ATEX Zone 21 Definition - What is Zone 21? A Zone 21 area is classified as a place in which an explosive atmosphere consisting of a mixture with air or flammable substances in the form of powder or dust is likely to occur in normal operation occasionally. These are typically process areas where dusts and powders are more likely to be present. For Zone 21 applications, we use passive protection.

Zone 21: an occasional presence of combustible dust during normal operation. Elements considered to be a risk must have one level of protection. Full risk assessment and technical details to be included in a technical file which must be stored with a notified body. Zone 22: the presence of combustible dust is unlikely, and if so for very short periods. Elements considered to be a risk must.

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ATEX flameproof motors for dust zones 21 and 22. 16 February 2007. WEG has extended its range of ATEX approved, high-efficiency motors with new dust ignition proof (DIP) units up to 355kW, that are suitable for zones 21 and 22 installation. The IP55 protected zone 22 motors offer the added benefit of operation in gas zone 2, allowing their installation in atmospheres containing both.

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Helpfully for engineers involved in safety evaluations of dust-laden atmospheres, the IEC Standard simplifies explosion protection by classifying risk areas into three zones: 20, 21 and 22. Zones explained. Zone 20, the most critical of the three, is an area in which an explosive atmosphere in the form of a cloud of combustible dust in air is.

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Zone 20, 21 and 22 Locations The IEC has recently introduced the three-Zone system for combustible dust locations. These have not been included in North American codes yet. The definitions are as follows: Zone 20 - an area in which a combustible dust, as a cloud, is present continuously or frequently during normal operations in sufficient.

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ATEX Zone 22 Definition - What is Zone 22? A Zone 22 area is classified as an atmosphere where a mixture of air and flammable substances in the form of powder or dust is not likely to occur in normal operation, but if it does occur, will persist for a short period only. These are typically storage areas but can also be process areas. For Zone 22 applications, we use passive protection.

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Explosive atmospheres can be caused by flammable gases, mists or vapours or by combustible dusts. If there is enough of the substance, mixed with air, then all it needs is a source of ignition to cause an explosion. Explosions can cause loss of life and serious injuries as well as significant damage. Preventing releases of dangerous substances, which can create explosive atmospheres, and.

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Electrical Apparatus and Hazardous Areas (Published 2007). Zone 21: Dust cloud likely to be present occasionally in normal operation: Zone 22: Dust cloud unlikely to occur in normal operation, but if it does, will only exist for a short period (The presence of dust layers does not automatically lead to the dust zone. The likelihood of the dust layer being disturbed to create a cloud needs.

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EX arm for combustible dust, zone 21,22. Find out more. Nex D. EX arm for combustible dust, zone 22. Find out more. High Vacuum Swing Arm. Swing arm SA-G is a on-tool extraction arm which offers maximum convenience when working with on-tool or on-torch extraction. Find out more. High Vacuum Balance arm. 1.5m to 3.5m. Find out more. Nederman FX2 Extraction Arms. For lab fume and odor.

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ATEX Classifications Glossary for products used in Explosive Atmospheres Explanations for product markings found on ATEX approved equipment. ATEX is the regulatory directive for the design, installation and use of products in environments where there is a potential explosion risk from flammable gases or dust that are or could be present in the surrounding air.

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ZONE CLASSIFICATION DEFINITION OF THE ZONE CATEGORY REQUIRED; ZONE 0 (GAS) ZONE 20 (DUST) Potentially explosive atmosphere is continuously present: CATEGORY 1: ZONE 1 (GAS) ZONE 21 (DUST) Potentially explosive atmosphere is likely to occur in normal operation: CATEGORY 2: ZONE 2 (GAS) ZONE 22 (DUST).

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