Chris Mamros

I guess that’s kind of what I was looking for. 
 

My apologies John for not giving a geographical location because I really don’t have one!

actually, I’m a safety and environmental professional, and I work for an organization that does analytical work and relies on lab grade, chemicals and compressed gases of all types. I was trying to get a feel for whether it’s common practice to use a gas cylinder for different gases on every cycle of refilling by a supplier…

I mean, there are the obvious cylinders that can’t be mixed up like acetylene. 
 

But what do you think it would just be common sense that cylinders with other types of gases never go to laboratories, hospitals, R&D facilities, etc.

I read all of the regs and the compressed gas association materials, and it indicates about purging and to basically remove contaminants. 

Just trying to learn a little bit about how it’s handled from the average supplier.

What better way to learn, then to ask people that are accomplished professionals

I would like to ask Mr. Sells a question if i may? Is it acceptable to use a cylinder for a different gas at all? There will almost always be some level of contamination, correct. I understand the unique nature of something like acetylene, but can a cylinder legally be used to fill with a gas it was not intended to contain?