Welders Oxy

[Bob Cooper]

Originally Posted by japandiver

That said, if you use welding O2 with a regular hp filter (activated carbon plus mol. sieve) IMO you should have no problems.

Does anybody actually run O2 through a filter?

[Mdemon]

Through a big lump of hydrocarbon?


Hmmm... Let me think about that one...

[beanie]

Originally Posted by Bob Cooper

A J of diving grade O2 is about £25 and you can do an aweful lot of nitrox fills for that. Don't see what the problem is. It's all the same stuff and comes from the same source anyway. Dunno how much a J of welding O2 is.

£6.52 + VAT

[beanie]

Originally Posted by Bob Cooper

Does anybody actually run O2 through a filter?

filter my O2 from an O2 clean cylinder into an O2 clean cylinder?

if my O2 was dirty it wouldn't be there

not to mention that the input of the filter would be 'dirty'

[japandiver]

In my mix panel the last thing I have before the fill whip is a simple hp filter. the logic being that if there is any debris or hydrocarbons (which there shouldn`t be) then it should stay in the panel and not in my cylinder.

If you are just trans-filling then it is overkill; if you have a panel - why not.

[Andrew H]

Out of curiosity what do you pay for a J of Helium? Does that come in different grades too? In the past I have used CO2 for welding and also what the call 'Tavern Gas' which is food grade CO2 to make fizzy drinks with. There was no discernable difference to weld with. We used whatever was cheaper. Is this just one of those Heinz / supermarket things where the products are all the same? Out of curiosity since many dive shops seel these gases by the litre, how many litres are there in a J? That's how many does it hold not how big is it...

[chrisch]

I think the main cost of a fill from a shop is really the person's time. I pay €10.00 for a 12L fill and the price is the same no matter what (existing gas EAN% etc..)

When I had access to gas and compressor at my old club we paid £2.50 for O2 per fill and any "profit" went into club funds.

I kind of agree with Bob Cooper. £25 isn't that much for a J and the 15 quid or so saving is questionable if you get a bad J and can't use it. I guess if you use lots and lots it might be worth a look.

I wonder how many unscrupulous dive shops use welders without telling you?

Chris

[beanie]

Originally Posted by chrisch

I wonder how many unscrupulous dive shops use welders without telling you?

none they wouldn't risk it

[tiewrapdiver]

I heard that the main cost of using your own J's was the hire cost of the cylinders, is this correct?

Tim

[beanie]

Originally Posted by tiewrapdiver

I heard that the main cost of using your own J's was the hire cost of the cylinders, is this correct?

Tim

19p + VAT a day!! per cylinder