arpadveress 
According to ISO 80079-37:2016 there is only one marking possible: Ex h for Ex non electrical devices.
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Methodologies to confirm the EPL Ga and Da for non.electrical Ex
Identify potential ignition sources which are effective or can become effective in
preventive measures Ex
Preventive measures to reduce the explosion risk from flammable materials are based
Used machinery both in Ex but industrial area too
How shall we check the compliance of a used installation in case
Ex asset’s identification
IEC 60079-14 in chapter of Verification Dossier speaks about the ‘ID’ topic
