What is the chepest way to get welding o2?
What sizes is it sold in? and how does cylinder rental etc work?
What is the chepest way to get welding o2?
What sizes is it sold in? and how does cylinder rental etc work?
just go to a grow shop, ffs :-)
get a bottle from a scrap yard and get them to refill it, rental is seriously dear.
mrcheerful
How ? BOC and friends are _incredibly_ fussy about paperwork before they'll refill a "foreign" bottle.
Don't ever be tempted to refill your own oxygen bottles either. This is _very_ dangerous.
Especially with oxygen as opposed to other gases, as traces of oil/grease can spontaneously combust under pressurised O2
spontaneously combust
That's not what I was thinking of. I was thinking more of the critical temperature and runaway overheating. This is a big surprise to the people it kills.
It used to be that they didn't really keep track of bottles, so if you could pick one up from an unofficial source you could swap it for a full one from someone with an account, and only pay for the gas. I believe they now have systems that track each bottle, so anyone returning a bottle that wasn't issued to him is going to have a problem with his account (but that's just hearsay - I haven't dealt with them in quite a few years).
Although all the bottles are numbered, they don't check that the bottle you return is one that you have already been given. So once you have a bottle (not too difficult) just get a scrapyard or blacksmith to get it swapped for a full one.
mrcheerful
Long term, an oxygen generator.
The standard economic rules apply. Small quantities cost more. Blue Circle regarded my previous company as a small user eligible for a small discuont because we were only using abuot 80 tonnes a month.
John Schmitt
How do you know?
Will
I rent an "Argonshield" cylinder from BOC, I think O2 rental is similar cost.
The cylinder rental is something like £38 per year, and the gas fill about £30 ish each time I refill. Cylinder about 3' tall, not sure how much gas it holds, but I get about a year per fill!
I have an O2 cylinder which I bought as an outright buy for the cylinder from my local welding specialist shop (in Dunstable) and that cost something like £150 a few years back and refils are £20 ish I think, but no rental.
Alan.
Do you happen to know how hard it is to buy small (25l dewar refills) of LOX? What sort of paperwork on the dewar is likely to be required?
Commercial or personal? Personal is about impossible, commercial normally carries a monthly charge and a per-litre price. If you get the dewar from BOC, it will have all the paperwork sorted, with a three-yearly (more dough) inspection and re-certification. You will also have to satisfy BOC that it will be properly stored. A small roofed and lockable outbuilding with mesh door or walls should suffice. You can get a rep to call by for an informal chat.
John Schmitt
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