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ATEX

Dustcheck are fully experienced in ATEX directives and can supply products and systems fully compliant to the standard necessary. These directives are ongoing and Dustcheck has recently been involved in tests to assess explosion in small vessels.

Using specific information can significantly reduce the cost of any explosion preventative and protection measures that may be required.

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The following is an explanation of the standards and what it means – do not hesitate to contact us if you need to discuss your requirements.

Many dust collector applications involve handling or working within atmospheres that are potentially explosive. To ensure that the equipment supplied is safe for use in these environments it must comply with the ATEX directives.

What are the ATEX directives?
These are European Directives and there are two:-

ATEX95 (94/9/EC) covers Equipment and protective systems for potentially explosive atmospheres.

ATEX137 (1999/92/EC) covers the minimum requirements for improving the safety and health protection of workers potentially at risk from explosive atmospheres

In the UK these directives were implemented into existing regulations where 94/9/EC falls under the EPS, The Equipment and Protective Systems Intended for use in Potentially Explosive Atmospheres Regulations 1996 (EPS) and 1999/92/EC falls under The Dangerous Substances and Explosive Atmospheres Regulations 2002 (DSEAR).

What does this mean?
Users of equipment and factory owners must comply with DSEAR where they must:-

  • Find out what dangerous substances are in their workplace and what the fire and explosion risks are.
  • Put control measures in place to either remove those risks or, where this is not possible, control them.
  • Put controls in place to reduce the effects of any incidents involving dangerous substances.
  • Prepare plans and procedures to deal with accidents, incidents and emergencies involving dangerous substances.
  • Make sure employees are properly informed about and trained to control or deal with the risks from the dangerous substances.
  • Identify and classify areas of the workplace where explosive atmospheres may occur and avoid ignition sources in those areas.

To support the classification of the workplace there are two standards:-

EN 60079-10 Electrical apparatus for explosive gas atmospheres: Part 10 – Classification of hazardous areas.

Dust according to EN 61241-10 Equipment for use in the presence of combustible dust: Part 10 – Classification of areas where combustible dusts are or may be present. In classified areas there is a need to avoid the possibility of explosion by eliminating any ignition source from the equipment used in the area. This equipment has to be risk assessed to identify any potential ignition source, any found must then be eliminated or reduced to an acceptable level before the equipment can be safely used.

Since 1st July 2003 all new equipment for use in classified areas needs to comply with 94/9/EC or EPS in the UK.

Since 1st July 2006 all existing equipment used within a classified area needs to have been assessed, and if needed, modified, to ensure it is safe for use.

How do you know if the equipment used is safe?

Equipment that is in compliance with 94/9/EC or EPS will be marked; part of this marking will include what category of equipment has been supplied. It is a case of matching the equipment category to the classified area as follows:-

Classified area – Zone 20 or 0Equipment Group II Category 1

A place in which an explosive atmosphere caused by mixtures of air and gases, vapours, mists or air/dusts mixtures are highly likely to occur and are present continuously, for long periods of time or frequently.

Classified area – Zone 21 or 1Equipment Group II Category 2

A place in which an explosive atmosphere caused by mixtures of air and gases, vapours, mists or air/dust mixtures are likely to occur

Classified area – Zone 22 or 2Equipment Group II Category 3

A place in which an explosive atmosphere caused by mixtures of air and gases, vapours, mists or air/dust mixtures are unlikely to occur and if they do occur, do so infrequently and for a short period of time only.

It is possible to use higher category equipment in a lower category requirement for example category 2 equipment can be used where category 2 or 3 equipment is required.

Existing equipment, supplied before 1st July 2003, will not carry the ATEX marking, the assessment and record of any modifications should form the justification for the continued use.

There will be instances where the equipment contains a potentially explosive atmosphere and explosion protection is used. ATEX requires that the explosion protection complies with the Directive and that the potential effects of the explosion are mitigated.

Dustcheck can supply fully ATEX compliant equipment for use within and containing a potentially explosive atmosphere.

Links

IFA explosion characteristics of dusts.

Unsure if the dust being handled is explosive? If so, check using the link below:

http://www.dguv.de/ifa/Gefahrstoffdatenbanken/GESTIS-STAUB-EX/index-2.jsp

The link opens up a widely regarded database giving important combustion and explosion characteristics of more than 4600 dust samples from virtually all sectors of industry.

If you require any further information, please complete our form and send us a message.

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ATEX PDF –

Links

IFA explosion characteristics of dusts.

Explosion Protection of Small Vessel

Explosion Protection of Small Vessel

Dustcheck has always complied with the state of the art knowledge and legislation, and provided explosion protection, where it is justified.
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