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Can we use density at operating condition in IEC 60079-10-1

OhmQu3st

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Jun 3, 2025
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Hey everyone! I have a quick question for those who are familiar with IEC 60079-10-1. Is it okay to use the gas or vapor density at operating conditions instead of the standard conditions when we're classifying hazardous areas? I'd really appreciate any insights or references if you've come across this before.
 
I think you should be good to go. If I'm not mistaken IEC 60079 10 1 assumes standard conditions, but accepts adjustments as long as there's a good risk assement backing it up. Make sure you document everything and are consistent.
 
Hey everyone! I have a quick question for those who are familiar with IEC 60079-10-1. Is it okay to use the gas or vapor density at operating conditions instead of the standard conditions when we're classifying hazardous areas? I'd really appreciate any insights or references if you've come across this before.
Yep, you can use operating conditions, but only if they make the classification more conservative. Standard conditions are the baseline, though, so you'll need justification if you deviate. Best to double-check with your local authority or DSEAR rep just to stay on the safe side.
 
Yes, but only if using operating conditions makes the outcome more conservative. Always back it up with proper documentation and get a second opinion if you're unsure.
 
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