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What Must I Do to Comply With the
ATEX Directive 94/9/EC?
- For products that meet the scope of the ATEX Directive, you must ensure that they comply with the Essential Requirements specified in Annex II of the ATEX Directive.
- To ensure that your products comply with the ATEX Directive, you need to follow the applicable Conformity Assessment Procedure(s). (These procedures may involve the participation of a notified body.)
What Are the Essential Requirements?
The Essential Requirements listed in Annex II relate to features of equipment and protective systems that are necessary in order to prevent explosions or to control the effects of incipient explosions.
The Essential Requirements fall into three groups:
- Common Requirements
- Requirements for Equipment
- Requirements for Protective Systems
Common Requirements
1. General Requirements
- Principle of integrated explosion safety
- Special checking and maintenance conditions
- Surrounding area conditions
- Marking
- Instructions
2. Selection of Materials
- Materials that could trigger explosions
- Adverse reactions between materials
- Resistance to service conditions
- Safe operation throughout foreseeable life
- Prevention of leaks
- Dust deposits
- Additional means of protection
- Safe opening
- Protection against other hazards
- Overloading of equipment
- Flameproof enclosure systems
3. Potential Ignition Sources
- Hazards from different ignition sources
- Static electricity
- Stray electric and leakage currents
- Overheating
- Pressure compensation operations
4. Hazards Arising From External Effects
- Safe operation under specified operating conditions
- Resistance to mechanical and thermal stresses and aggressive substances
5. Requirements in Respect of Safety Devices
- Safety function independent of measurement or control function
- Detection of failure - fail safe
- Direct actuation of control device
- Equipment and/or protective systems made safe
- Restart lockouts
- Control and display units
- Devices with measuring function for explosion protection
- Risks arising from software
6. Integration of Safety Requirements Relating to the System
- Manual override
- Dispersion of accumulated energy
- Power failure
- Connections and interface
- Warning devices
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