Since July 1st it has been mandatory under European law, that all equipment for use in a potentially explosive atmosphere must conform to specific safety. Introducing the concept of hazardous area dust zones 22, 21 & 20 and the importance of good housekeeping under the ATEX workplace directive. U wilt weten welke atex zones er zijn? Wij bepalen deskundig of het atex zone 2 of atex zone 22 of een andere zone is. zone indeling. atex zonering tekening.

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Basic concepts for protection – SCAME SK –

The finer wood dusts remain suspended for a longer time and are more hazardous; these dusts, however, are removed by the aspiration systems.

Dust transport systems, interiors of mixers, mills, dryers, desiccators. Fleet Service Lights and Lighting Equipment. Basic Concepts Atomic weights most commonly used in environmental engineering.

Overzicht van markeringen op explosieveilig elektrisch materieel. European Directive — The protection of workers from potentially explosive atmospheres — makes it mandatory under European law to assess for an explosion risk and classify the area accordingly.

Temperature class relates to zoneding parts of equipment that can come into contact with potentially explosive atmosphere. Encapsulation denotes sealing components representing potential sources of ignition from contact with ignitiable atmospheres by sealing them within thermoplastic, epoxy resin or similar materials, resulting in what is commonly referred to as “fully potted” components. Equipment for gas The surface temperature of the electrical equipment must not exceed the ignition temperature of the hazardous substances present; for group II electrical equipment the maximum surface temperatures are divided into temperature classes from T1 to T6 according to the limits indicated in the table below.

I – Watts. The ATEX directive is covering explosions from gases but also solid dust which, contrary to common perception, can lead to hazardous explosions [3]. In very broad terms, there are three preconditions for the directive to apply: Dust containment Parts of the process equipment within which the dust is handled, treated, transported or stored, e. April Atex zonering how and when to remove this template message. Suppose we reckon that some variable of interest, y, is ‘driven A static vacuum pump fitted to a ring main is more suitable for large factories; the ring main should be provided at intervals with facilities for the connection of flexible cleaning hoses.


Furthermore, the outer surface temperature of the equipment is kept below the maximum surface temperature T, in relation to the maximum temperature for cloud TCL and layer Tl provided for in the installation site. Yacht Engine Room Lights. Standards, the rules for approval and certification, and the accepted testing bodies occasionally overlap regions and change or are added to frequently, thus it is up to the individual to keep abreast of which of these may affect them.

This zone refers to an area where the atmosphere is likely to pose zonfring explosion or fire hazard during normal operations.

Food Grade Safe Lights. These openings will have to be located in the highest part of the outer walls of the building. Group1- Category M2 refers to mining locations and denotes that in the case of exposure to an explosive atmosphere the equipment must become de-energized. All joints should be flanged and packed. Housekeeping In many plants designed for the handling and processing of flammable materials, dust may escape from equipment and settle on the floor and atex zonering fixtures and fittings in the zonwring.

Explosion properties of all used substances Then the explosion properties of the substances used are listed, such as the Kst, the flash point, the minimum ignition energy or the maximum permissible surface temperature. Basic Concepts These two coincide only zoneringg. Note that screw conveyors have the ability to transfer an explosion through the mechanism of disturbing internally settled dust – hence zone 22, not non-hazardous.

Thus the explosion can occur only in the presence of an ignition source and when the concentration is within the explosive range of the substances, i. The regulations apply atex zonering all equipment intended for use in explosive atmospheres, zonerint electrical or mechanicalincluding protective systems. The classification of the areas is necessary only in the case in which one or more of aonering cited requirements are not met. Pressurization denotes purging any hazardous gases that may be present within the enclosure by displacing it with large volumes of air or inert gas.


ATEX directive

Group1- Category M1 refers to mining locations and denotes the requirement that equipment for use in this environment must remain functional even in the event of infrequent failures, and contain at least two integral safety features that will ensure continued safety even if one of the features fails. Zone 0 Zone 1 Zone 2 Although there is no fixed rule regarding the presence duration and probability of explosive atmosphere in relation to the zones 0, 1, 2the following table represents a useful reference.

We’ll detail the basics, then offer example comparisons and details that should provide a better overall understanding of how these standards relate to each other, and what is needed to manage equipment compliance from atsx to the next.

A sustainable landscape is more than the conscious arrangement of. Grolsch gaat stofproblemen op moutafdeling met succes te lijf.

The maximum temperature Tmax l to prevent the ignition of the dust layers aex be 75 K safety margin less than the minimum ignition temperature of the 5mm-thick layer. Conforms to the Harmonized European standards 2 – e: This zone refers to an area where an explosive atmosphere is always present or may be present for an extended period of time.

Applications Motors, fuses, lamps, low-power equipment and instruments, current transformers, plant-engineering materials such as terminal boxes, junction boxes and socket-outlets.