Instructions for ATEX certification
Key:
(BGR - Trade association regulations
TRBS - Technical regulations for operational safety
TRGS - Technical regulations for hazardous substances)
6. General concepts regarding the operating company
The operating company is responsible for:
• Performing an assessment of the existing zone
• Selecting the appropriate operating equipment in the relevant device category
• Observing the installation regulations
• Ensuring compliance with safety requirements
• Producing the explosion protection document
• Observing the procedure for checking the safety measures.
7. Legal requirements
Further legal requirements are to be found in Directive 98/24/EC and Ordinance on Hazardous
S
ubstance Decree §12.
8. Surface temperature
The maximum permitted surface temperature of the devices is allocated to classes T1 to T6. The
permitted temperature for the stated temperature class T3 is 200°C.
The user must perform the assessment of the individual substances with regard to their ignition
temperature on the basis of his knowledge.
9. Conformity assessment
The conformity assessment for devices of category 3 of device group II and “EX II 3G IIC T3 X”
c
ertification is conducted by the in-house Production Inspection in accordance with the specifications
set out in the documentation. Individual inspections are to be conducted. A complete record of the
results for every device is to be stored in the PPS system.
Maintenance and repair
After repair or maintenance work has been carried out, the pump must be subjected to an inspection.
One inspection criterion is final pressure. If this is reached, it may be assumed that the leakage of the
device lies within the required tolerance. This ensures that there is no mixture capable of being ignited
within the internal space of the pump.
10. Technical documents for the EC type test
1. Risk assessment
2. Test certificate
3. Internal inspection and production inspection of the products
4. Declaration of conformity (CE)
5. Designation on the rating plate
6. Additional statement in the valid operating instructions on the usability of the MPC types as devices
of category 3 in zone 2 (Internal atmospheres only).
WELCH_ATEX_03-01 3
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