Jaybird180
Final Approach
Why is everything that says aviation so expensive? Any other options?
Why is everything that says aviation so expensive? Any other options?
For my portable bottle I just take it into the gas place in Manassas and they fill it up, with ABO, cheaply.
And most gas shops will sell you a large tank of ABO. Some will even lease you the transfer gear.
For my portable bottle I just take it into the gas place in Manassas and they fill it up, with ABO, cheaply.
Used to be Lee Gas... now a different name... Matheson ValleyTim, can you drop me a PM with the name/location of the place in Manassas that you get your bottle filled?
Used to be Lee Gas... now a different name... Matheson Valley
9113 Industry Dr,Manassas Park, VA 20111
703-369-4195. Just called them and they confirmed they do ABO.
I'm going to take my bottle out to Fireline in Leesburg as it needs a hydro test.
What's "cheaply"? The local gas guy at the airport charges me $60 for my D-sized (415 liter) bottle. I have yet to find a welding or gas supply store that fills onsite. All of them have told me they do exchange only, or send your bottle offsite (and have expressed reluctance to do so, since tracking the bottle and making sure you get it back is nigh on impossible).
At every O2 source I've ever seen or used there are no "grades" of O2. Sometimes there are slightly different protocols such as evacuating before filling but all the O2 comes from the same tank.Just remember when filling you want the correct Grade of O2 (although most bottles now are all filled with high grade), filled with the correct method. Industrial grade O2 cylinders may (or may not) be contaminated with other gases, primarily Acetylene. This is important in mixed gas diving, as well as medical, and Im betting aviation gas too.
Just specify the use when you get the bottle from the Welding shop, and they will give you the right one.
Just remember when filling you want the correct Grade of O2
So where are good places to buy portables? I've looked at prices on Sporty's.
Just remember when filling you want the correct Grade of O2 (although most bottles now are all filled with high grade), filled with the correct method. Industrial grade O2 cylinders may (or may not) be contaminated with other gases, primarily Acetylene. This is important in mixed gas diving, as well as medical, and Im betting aviation gas too.
Just specify the use when you get the bottle from the Welding shop, and they will give you the right one.
Just remember when filling you want the correct Grade of O2 (although most bottles now are all filled with high grade), filled with the correct method. Industrial grade O2 cylinders may (or may not) be contaminated with other gases, primarily Acetylene. This is important in mixed gas diving, as well as medical, and Im betting aviation gas too.
Just specify the use when you get the bottle from the Welding shop, and they will give you the right one.
Utter BS and OWT.
Industrial oxygen has to be pure to avoid contaminating the work.
Not to mention acetylene is a low pressure gas that vaporizes from a liquid. Oxygen is stored at high pressures. Acetylene would have to travel upstream through a check valve, against higher pressures through two regulators. Not to mention hydrocarbons pressurized by oxygen reacts violently.... I.e EXPLODES.
All the oxygen sold now comes from the same cryogenic stream. The only difference is med oxygen goes in tanks with tracking numbers, and the tanks are pulled to vacuum between fills.
Nope. Most pros will have check valves to prevent this (required by OSHA) and first off, O2 runs about 3 times the pressure out of the regulator, so it's O2 that heads for the acetylene bottle, but either way it won't make it because of the regulator. Either the regulator or hose explodes when you clog the tip and it's not on right and you don't have check valves.
I got Tri Mix certified in '95, Nitrox in '92, every breath of O2 I ever took was welding supply. It all comes from the same tank of LOx.
Utter BS and OWT.
Industrial oxygen has to be pure to avoid contaminating the work.
Not to mention acetylene is a low pressure gas that vaporizes from a liquid. Oxygen is stored at high pressures. Acetylene would have to travel upstream through a check valve, against higher pressures through two regulators. Not to mention hydrocarbons pressurized by oxygen reacts violently.... I.e EXPLODES.
All the oxygen sold now comes from the same cryogenic stream. The only difference is med oxygen goes in tanks with tracking numbers, and the tanks are pulled to vacuum between fills.
O2 runs about 3 times the pressure out of the regulator
Same tank construction, same oxygen, different filling method. Note in my OP that "most bottles now are all filled with high grade".
And they are pulled to a vacuum for a reason. To prevent even the slightest chance of contamination. I will agree that the chance is remote, but the rules are in place for a reason.
And when you run the bottle dry? I don't run check valves on my welding rig. (They flutter at low flow rates)
The chance of anything bad happening is really small, so I see why people fill with a non-vacuum procedure and welding tanks. I didn't want to get into an argument, just wanted to point out there IS a difference.
The way I avoid the contamination in my breathing bottles is by leaving 50 PSI in them and they just refill my tanks from the LOx tank and I'm good. It's not a great worry anyway to have your breathing O2 a bit contaminated. I know industrial process that are more finicky of impurities than humans are.
One shipyard job I was on they had bought all these cheap cutting rigs and we lost like 6 hose and regulators in a week... They gave everybody check valves and said we had to use them.
Yup, that bout sums it up.