The main oxygen thread is here and this post should be applicable.
The gas in the cylinder is actually the same. The same process is used and the % of water is miniscule, because by the time you distilled out the nitrogen, oxygen, etc, there will be no water whatsoever left other than contamination in the metalwork.
These are the specifications:
The specifications are also different in what is allowed to be in the 0.5%.
In practice, all oxygen is produced using the same proces – cryogenic separation – and stored as liquid oxygen, which means there is virtually NO water present, and delivered with 99.9% or better purity, but of course water (and other stuff) can be reintroduced in the filling process.
DA40drvr wrote:
Correct me if I am wrong
Oxygen is oxygen is oxygen
Correct me if I am wrong from those who know more [and it may be tosh], but I was told that aviation oxygen had a guaranteed very low moisture content, so that the moisture would not become water then freeze and block narrow pipes in cold (-50C) conditions, and that not the same requirement applies for welding O2.
My O2 cylinder is also on a BOC welding gas account. It is the same gas as any other O2. Only the paperwork differs.
I ask the question because I have a BOC account for my welding gear.
I have no need for oxygen for aviation but wondered if perhaps I might be of some use to those that do.
One of the parachute rigger doing a lot of gliding club parachute repacking has a side business in refiling oxygen bottle. So it might be worth contacting him to see if he’s going to Lasham or Kenley.
His ad on glider ads website Grbmlyou need to login ;(
Tim Moran
T.P.F. Parachute Services
Tel: 01594 530230
Mobile: 07785 352306
[email protected]
Oxygen is oxygen, I prefer local oxigen.
Is welding oxygen the same as breathing oxygen?
I believe that RGV at EGBJ (Gloucester Staverton) offer oxygen bottle refills for a reasonable price (they used to do so, a few years ago)