On Mon, 13 Feb 2017 09:14:25 -0800, pyotr filipivich
wrote:

Martin Eastburn on Sun, 12 Feb 2017
21:20:21 -0600 typed in rec.crafts.metalworking the following:
The impurity is 'natural' from pumps and valves. In medical oxygen that
might feed through machines that are very expensive or feed a person
with 20% of their lung left, the air is FILTERED heavily.

At 10 or 20,000 feet with flights up to 80,000 one does not want
moisture in the air line. Simple as that.

Isn't that why they put the PSA in the bottom of the tank?


I'm still confused.

What sort of 'impurities" can be in an oxygen environment? Okay,
water / humidity I can understand - it is "inert". But how did it get
in their in the first place? One would think that distilling Oxygen
out of the atmosphere would first remove the water.
Part of my confusion come from having dealt with the specs for
manufacturing medical equipment which would be part of the oxygen
system. "Not oil at all." Not before, not after, not during "Thou
shallt have no oil in the presence of the metal. Neither shall it be
on the tools thou useth. On the finished part is straight off."

Especially in Antioch, unless thy passeth the holy hand grenade.


--
Give me the luxuries of life.
I can live without the necessities.
--anon