On Wednesday, December 4, 2019 at 7:55:41 AM UTC-8, John DeRosa OHM Ω http://aviation.derosaweb.net wrote:
Interesting document on pressure tank markings. Is there a US version of this somewhere?

Thanks, John

Of course I can't find a document I've had for years, a simple explanation of cylinder markings!

Here's a course from Los Alamos National Lab.

https://permalink.lanl.gov/object/tr...LA-UR-13-28838

And cylinder manufacturer markings.

http://www.ctcseminars.com/files/tec...GRLIST2017.pdf

Jim