On Jul 13, 11:37*am, Bill D wrote:
On Jul 13, 11:51*am, jcarlyle wrote:

On Jul 13, 12:39 pm, Darryl Ramm wrote:

Maybe more useful discussions on saftey are not related to the O2
labeling but the handling of the cylinders, trans-filling procedures,
maintenance and servicing etc. I've seen some pretty blase/scary
handling of O2 by glider pilots, old steel bottles last inspected God
knows when, etc...

I'd welcome some discussion on the topics you mention. That would fill
a real need for pilots like myself who don't often use oxygen.

One thing I'm curious about is the hydrotesting requirement. If one of
the legendary arguments for using "aviation" oxygen is its low
moisture content (debunked above), then:

From talking with a hydrotesting shop owner as I waited for a bottle
to be serviced.

1. *how is water completely removed from a cylinder after
hydrotesting, andl

They evacuate the bottle to a high vacuum while mildly heating it.


Yes pumping is another way, I am not sure I wonder if more places have
drying blowers than vacuum pumps. BTW its just a vacuum--a high vacuum
has as specific meaning (mean free path of the gas molecules approach
the size of the object) and most places just would not have the fancy
diffusion or other pumps or staff skills/training needed to pump down
to a high-vacuum.

Darryl