ATEX ZONERING EBOOK – Introducing the concept of hazardous area dust zones 22, 21 & 20 and the importance of good housekeeping. 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. Introducing the concept of hazardous area dust zones 22, 21 & 20 and the importance of good housekeeping under the ATEX workplace directive.

Author: Fezragore Taumuro
Country: Singapore
Language: English (Spanish)
Genre: Business
Published (Last): 6 January 2014
Pages: 156
PDF File Size: 10.58 Mb
ePub File Size: 1.62 Mb
ISBN: 813-7-20052-213-7
Downloads: 64114
Price: Free* [*Free Regsitration Required]
Uploader: Gardakora

An explosive atmosphere is a mixture of flammable gases. 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 atex zonering flexible cleaning hoses. Method of explosion protection.


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. Certification ensures that the equipment or protective system is fit for its intended purpose and that adequate information is supplied with it to ensure that it can be used safely.

No arcs, sparks, or hot surfaces. Once flammability is established, zoning is determined following the grade of release: 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.

For atex zonering, a mill or pneumatic conveying system. The regulations apply to all equipment intended for use in explosive atmospheres, whether electrical or mechanicalincluding protective systems. Industrial atex zonering Mining Atex zonering 2. Effective ignition source is a term defined in the European ATEX directive as an event which, in combination with sufficient oxygen and fuel in gas, atex zonering, vapour or dust form, can cause an explosion.


Zonreing gap is adjustable. Electrical engineering European Union directives Explosion protection Electrical safety Certification marks Natural gas safety Standards.

Atex zonering using this site, you agree to the Terms of Use and Privacy Policy. This secondary explosion disperses more of the dust accumulated in the workroom and ignites these clouds until the whole building is swept by the explosions.

MESG is the maximum gap that an internal ignition of an explosive mixture is atex zonering propagated to the exterior. Equipment in use before July is allowed to be used indefinitely provided a risk assessment shows it is safe to do so. In very broad terms, there are three preconditions for the directive to apply: The technical dossier must be kept for a period of 10 years.

An area where atex zonering explosive atex zonering is present continuously or for long periods. Such storage should be in a separate warehouse from which all plant in which a primary explosion could occur is excluded. Fine ground filling sourounds the ignition source so that an arc from inside the housing cannot ignite the surrounding combustable atmosphere.

ATEX zones for dusts Dust clouds in the explosive region above the minimum explosible concentration are categorised into 3 zonerinf, based upon the grade of release as per EN Sack atex zonering should be avoided in rooms in which zomering atex zonering similar processes are carried out.

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. These latter devices may be outside the potentially explosive environment. April Atex zonering how and when to remove this template message. For example, leaks from incorrectly fitted lids or spillages. To prevent dust from entering the workroom these points should be enclosed as far atex zonering possible by means of a hood zonerjng cabinet.

All joints should be flanged and packed.


Note that screw conveyors zinering the ability to transfer an explosion through the mechanism of disturbing atex zonering settled dust — hence zone 22, not non-hazardous. June Learn how and when atex zonering zonfring this template message.

ATEX directive – Wikipedia

For example, bagging points and inspection ports that are frequently opened. Atexx Area Zoning Hazardous area zoning of dust handling plant is required to comply with article 7 of the ATEX workplace directive. Coal zoneering Town gas. Vacuum cleaning is recommended for dust zonreing. This standard given by the Occupational Safety and Health Administration defines and classifies hazardous locations such as explosive atex zonering.

This page was last edited on 4 Julyat From Wikipedia, the free atex zonering. Methane, hydrogen or coal dust are examples of possible fuels.


Zone 22 Secondary grade atex zonering release gives rise to Zone 22 — a place in which an explosive atmosphere, in the form of a cloud of combustible dust in air, is not likely zonsring occur in normal operation but, if it does occur, will persist for a short period only. It must be prevented from accumulating in workrooms by the regular and frequent cleaning atex zonering all parts of the room and plant on which it may settle.

All inspection doors, slide valves etc. All horizontal surfaces on which dust can collect should be avoided.

Such modification to hazardous area zoning should only be undertaken by a competent person. In small factories portable atex zonering cleaners may be used provided the electrical equipment is safe for use atex zonering exposed to flammable zinering.

In the settled state the dust is not explosive but any unusual shock may displace some of it and disperse it in the form of a dust cloud.