Tango Whisky wrote on 2/24/2021 5:19 AM:
The point is that with welding oxygen, there is no tracability that a an empty storage cylinder hasn't been left open which would enable moisture to enter.

My welding supply place says they evacuate oxygen cylinders before filling them, because even a
cylinder that still has pressure in it can be accidentally back-filled with some other gas in
normal use. That was to explain why the fill fee is the same, regardless of how much pressure
the bottle had when I gave it to them.

--
Eric Greenwell - Washington State, USA (change ".netto" to ".us" to email me)
- "A Guide to Self-Launching Sailplane Operation"
https://sites.google.com/site/motorg...ad-the-guide-1