Where an area is classified, equipment should be selected and used on the basis that is does not create an ignition source for the atmosphere during its intended use and the frequency the atmosphere is present.
A risk assessment is often used to confirm that the equipment used in the area is safe for use.
Since 1st July 2003 all new equipment for use in classified areas has needed to comply with 94/9/EC, 2014/34/EU or EPS in Great Britain.
Since 1st July 2006 existing equipment used within a classified area has needed 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 supplied since 1st July 2003 that complies with the ATEX directives 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:-
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 equipment also 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.
Filtermist can supply fully ATEX compliant equipment for use within and containing a potentially explosive atmosphere.
IFA explosion characteristics of dusts.
Unsure if the dust being handled is explosive? If so, check using the links below:
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.