don_resqcapt19 said:How can people be working in a Class I, Divison 1 location? In many cases the atmosphere created by flammable gasses is IDLH(Immediately Dangerous to Life and Health), requiring the use of supplied breathing air, at about 10% of LEL. If the gasses are only at 10% of LEL it should not be Class I, Divison 1.
In these areas that remain division 1, is respiratory protection or "sniffing" required for personnel entry?
Maybe I just opened a big can of worms for everyone involved.:grin:Basic US domestic classification practices have been around a long time. I was an API 500/505 author for the last three editions and we were never informed by the legal group of any such current or pending litigation either - and we were informed about a lot of current and pending legal actions.