Oxy/acet tank ownership transfer

[5030]

Not a myth, it is fact. The acetone that keeps the acetylene gas stable will affect regulators. Those bottles aren't empty like high pressure gas bottles are. The filling "looks" like concrete but isn't.
David from jax

Exactly and you can actually have an acetylene bottle tilted and withdraw from it, so long as the tilt isn't over 25 degrees from vertical.

 

[etpm]

Maybe someone knows why acetylene tanks were strap flat to running boards for use in the Brass Era cars with acetylene lamps.

I know drawing too much acetylene by volume too quickly also creates problems in any tank.

I don't know anything about the placement of acetylene tanks on running boards but do know about the excessive draw from acetylene cylinders. Acetylene cylinders are filled with a substance that resembles plaster of paris. This substance is porous and saturated with acetone. Then acetylene is then pumped into the cylinder under pressure where it then dissolves into the acetone. Drawing the acetylene too fast becomes a problem because it starts to draw the acetone out of the cylinder. This will be obvious to the observant torch user because the flame will change. I do not know how acetylene cylinders are filled. When the pressure goes above 15 PSI acetylene gas may spontaneously decompose violently. But there is a gas space above the acetone and before the regulator where the pressure is way higher that 15 PSI. So why doesn't the regulator explode? A chemist explained it to me thusly: The acetylene molecules need to have a certain energy to explode. By accelerating in an open space they can do that. The molecules accelerate through an open space and move faster and faster. Then they run into another acetylene molecule and release the energy from hitting another molecule and then an explosion happens. But because the space in the top of the cylinder is small and the space in the regulator is also small the acetylene molecules can't accelerate to high enough speeds to explode. But after the regulator is the hose which provides a long space for the molecules to speed up, collide, and explode. So this is why the pressure must be kept below 15 PSI because then there is not enough energy to accelerate the molecules fast enough to explode.
Eric

 

[ultrarunner]

Most often these are the 40 cu ft B series acetylene for automotive and we’re common with plumbers.

The MC series is much smaller and for motorcycles.

 

[mrmikey]

Also if you draw the acetylene tank down past empty , it'll start drawing the acetone out also. I've done it a couple times and you can see the wetness on the plate around the flame when you're cutting something, you can smell it as well.

 

[lostcause]

as far as transferring bottles, i think the buyer would carry all the burden, even with "paperwork". seems like you are a conscientious seller, so i would have the potential buyer contact the place where he plans on swapping (or filling, if possible) bottles. around here, virtually all bottles over 60cf are leases, and most all are stamped with the owner on the ring under the valve. they may get a little squirrely when you take a competitor's marked bottle in and tell them you own it. i have (3) purchased 60cf bottles with smooth rings under the valves and i never get any questions on them. 60cf and under are generally considered "owned" bottles around here. whenever i swap, i do make sure they give me back a smooth ring bottle, and also one with a screw on cap. I've had them offer me marked bottles, and ones without threads or cap on argon cylinders recently, but i take the Nancy Reagan approach - just say no.

 

[ultrarunner]

I wait for mine to be returned knowing it’s another trip.

Small bottles had filled at the supplier… they have a series of tanks with the last being at 3000 lbs or something

They put my small tank that is not out of date to the line and open the lowest pressure till equal, close and repeat until I have my 1800 pounds.

When I sold by recertified oxygen tanks my receipt said no questions asked 1 year refund less fill…

Never had one come back.

As for the ownership rings it’s not simple anymore… so many suppliers no longer exist…

Just a quick glance in the bottle room today and many different property of collars and some smooth collars too.

 

[5030]

I buy all m y 120's full from Weldfabulous Nothing on the collar rings but the hydrotest date. Like I said, first thing I do with them is mark them with my company name and get them refilled when empty.

I like dealing with them and shipping via Fed-Ex is included in the price. Get all my TIG consumables from them as well except the Tungsten which I but from Midwest Tungsten in McCook, Illinois. Get my annular cutters from them as well. They are distributors for CK Worldwide, my TIG torch of choice.

 

[WranglerX]

The thing about collar rings is there are so many names and so many companies that no longer exist.... It think its pretty much IGNORED..... Only thing I found different is one local welding supply paint all their bottles blue and stencil their name on them.... That tells me they are lease/exchange and won't deal with customer ownership.... I just drive on by and go another two blocks to my LINDE store....

 

[5030]

Like I said previously, I buy all my 120 cubic foot FILLED bottles of everything but acetylene from Weldfablous. They come via Fed-Ex and are well packaged in foam filled heavy cardboard boxes. Never a scratch on any of them though I do feel bad for the Fed-Ex delivery drivers as they are pretty heavy to move about and I have zero issues getting them refilled at the local (Toledo Ohio) Air Gas compressor station. Drop them off and pick them up a week later and having an account there, they just invoice me. The entire procedure at least for me is painless.

Weldfabulous sells on amazon as well but I buy direct from them anyway. Nice folks to deal with.

 

[CoyPatton]

My question which I believe will largely answer your question for you. How many times when getting a “refill” (my very limited experience with various tanks has always been an exchange) have you bern asked about proof of ownership?