Welding gas ripoff

orezok · Apr 12, 2012

I took my 80CF C25 bottle for a refill at Praxair. After I left I noticed that there was a sticker stating 69CF and the invoice said 70CF.

I guess Praxair can't get 80 CF in an 80CF bottle any more!

monckywrench · Apr 12, 2012

Was it filled to the proper psi? If so, it was properly filled.

orezok · Apr 12, 2012

monckywrench said:
Was it filled to the proper psi? If so, it was properly filled.

Good question. It indicated 2350 on the gauge. Don't know what pressure is normal.

crazyal · Apr 12, 2012

The local dealer I use just swaps cylinders out. You pay a flat fee so there's nothing on the invoice to tell you how much you got. It's common practice to leave about 300 psi in a tank to avoid any air/ moisture getting into it. However I usually push it until empty because I'm in the middle of a project trying to finish.

Propane tanks for BBQ grills have a limiter built into them so you can no longer drain them empty. But some of the national companies like Amerigas are not filling the tanks up all the way. As far as I know that's only being done with propane.

tmeadows · Apr 13, 2012

I think that is a proper fill for that cylinder

yelbike · Apr 13, 2012

Just purely a guess. I wonder if it was 69 to fill, in other words, the tank wasn't quite empty.

k0ua · Apr 13, 2012

orezok said:
Good question. It indicated 2350 on the gauge. Don't know what pressure is normal.

That is a full tank

James K0UA

toxicjeeper · Apr 13, 2012

I am guessing that was full.. My brand new to me 150 cf tank only read 2000PSI when i got it from praxaire..

Ken45101 · Apr 13, 2012

crazyal said:
Propane tanks for BBQ grills have a limiter built into them so you can no longer drain them empty. But some of the national companies like Amerigas are not filling the tanks up all the way. As far as I know that's only being done with propane.

Yes, in general barbeque propane tank "swap out" is rip off any more. They only fill them 75% (16 lb) "to save you money"

Ken

J_J · Apr 13, 2012

I believe temp plays a role in the capacity of the bottle.

The pressure in a gas cylinder rises in direct proportion to its temperature

http://www.praxair.com/praxair.nsf/...ad00fdd293bf7e2c85257100005bba50!OpenDocument