What happened? What was source of ignition? Lack of competence? Whose competence is questioned here? ExCB, ExNB, manufacturer, designer, purchaser, installer, operator, maintainer, repairer?
All these questions above shall be addressed to responsible ones.
Who all are they?
It is better to be proactive.
Keep up good work!
Arpad
Why Ex personnel competency for mechanical and/or process engineers? Few days back
How do you do Ex compliance check on Ex non.electrical installation? Do
Be careful, not always true what you are introduced to… It happened
You are on site, and you do Ex detailed inspection. There are:
arpadveress 
