According to 4th edition of Compressed Gas Handbook 1999 Grade D air has
Less 1000 ppm CO2, 10 ppm CO and 5 ppm oil, O2 19.5% - 23.5% bal N2
I don't know if it has changed for the 5th edition
I can send you the table of grades. Listserve rejected my e-mail with it in it. Send me a e-mail and I can forward
Chemically Speaking LLC
Maybe it's Grade D breathing air he's thinking of?
Daniel Shiel, MBA, MS, CSP, CHMM, CPP
Director, Risk & Quality Management Services
Site Security Officer / Site DEA Compliance Designee
Pfizer La Jolla
10777 Science Center Drive
San Diego, CA 92121
Pfizer Internal Use
Those who mistake the unessential to be essential and the essential to be unessential, dwelling in wrong thoughts, never arrive at the essential. --- Dhammapada 1.11
Please excuse the cross-posting.
Anyone have any ideas for Cody? The google isn't very helpful.
Sent: Wednesday, May 25, 2016 10:27 AM
To: Debbie M. Decker <dmdecker**At_Symbol_Here**ucdavis.edu>
Subject: Compressed Air 'grade' question
I have a question that I was hoping you could help me answer.
What is grade 4 compressed air? what standard is that grade referring to?
Basically I need to present my PI with some information on the quality of our building compressed air compared to other options.
Scott (Facility Manager) has told me that the building compressed air line delivers "Grade 4" compressed air, which he found out from the ladies and gentlemen who maintain the pumps in the basement.
I have not been able to figure out what set of standards compressed air is measured by. I've heard of 'medical grade' and 'scuba diving grade'.... but even those are confusing me now that I've looked into it more.
Thank you and have a great Wednesday!
Debbie M. Decker, CCHO, ACS Fellow
Immediate Past Chair, Division of Chemical Health and Safety
University of California, Davis
Birkett's hypothesis: "Any chemical reaction
that proceeds smoothly under normal conditions,
can proceed violently in the presence of an idiot."
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