High O2 left for long periods...

[kinetic]

As ever....thanks for replies.

As it turned out, I serviced the regs and let the car mix the gas up, if it needed rolling about a bit.

I did, however, before diving, check out all regs and most were leaking at the first stage, second stages were in great shape.

Got the lot serviced.

After the dive, and after having polished off all the 8 month old gas (which tasted like newly pumped gas, which was to a nice 50m to get back in the swing, I took all cylinders to BOC on the island for service. All fine...no oxidisation whatsoever.

Thanks for the tips all.

Kind regards.

kinetic....the muppet

[Mark Chase]

Originally Posted by kinetic

Hello,

Been a bit inactive on the deco diving front for a while after her indoors had a go...

I have 4 cylinders with varying nx mixes in them from 50 to 80 percent. not used for about 8 months.

What's the view? Would it be silly to use them? Regs attached also have not been used for same period..same question?

Thanks for any comments...keep 'em sensible....I know I'm a muppet.

Kinetic

I filled the gas in my CCR bailout tanks in 2004. Its still in there and still analises out the same.

8 months is nothing. I use a gas bank (Js) and I keep them for at least a year.

ATB

Mark

[Depth-junkie]

Originally Posted by Mark Chase

I filled the gas in my CCR bailout tanks in 2004. Its still in there and still analises out the same.

8 months is nothing. I use a gas bank (Js) and I keep them for at least a year.

ATB

Mark

Wot you mean you r diving out of test stages/bailouts? Tut tut Mr Chase u r a naughty man, go stand in the corner and write out 50 lines of i must not dive out of date bottles



ATB
Gareth

[divingniknaks]

Originally Posted by Richard Mason

I don't get this.

Does 21% settle out if left for a while? I don't think so; so why would any other mix of O2-N2 settle out or stratify? They're miscible gases, not salad dressing.

Exactly, if that were the case, then we'd have evolved to have noses on our feet surely ?

[deepbull]

Originally Posted by Depth-junkie

Wot you mean you r diving out of test stages/bailouts? Tut tut Mr Chase u r a naughty man, go stand in the corner and write out 50 lines of i must not dive out of date bottles



ATB
Gareth

so what do i do as all 33 of my cylinders are well out of test
my last o2 clean on a cylinder has to be over 5years ago now
but i do pop the valves off every now and again to have a look inside

just how often do CCR divers re-fill there stages with mix?



ada

[Depth-junkie]

Originally Posted by deepbull

so what do i do as all 33 of my cylinders are well out of test
my last o2 clean on a cylinder has to be over 5years ago now
but i do pop the valves off every now and again to have a look inside

just how often do CCR divers re-fill there stages with mix?



ada

Your as bad as me then, the only cylinder in test i have is a little 2lt 02 evo bottle i bought last week



ATB
Gareth

[deepbull]

Originally Posted by Depth-junkie

Your as bad as me then, the only cylinder in test i have is a little 2lt 02 evo bottle i bought last week



ATB
Gareth

you must have some deep stuff coming up then

can someone tell me how the shops that pre blend nitrox in storage cylinders roll them about before filling your cylinders?

ada

[divingniknaks]

Originally Posted by deepbull

can someone tell me how the shops that pre blend nitrox in storage cylinders roll them about before filling your cylinders?

ada

You mount the storage cylinders on a plate supported by springs, it's then a simple matter of everytime someone walks past you just give the tank a push.

Bit like a Weeble !



.

[uwila]

Originally Posted by divingniknaks

Exactly, if that were the case, then we'd have evolved to have noses on our feet surely ?

not with my smelly feet, we wouldn't


The atomic weight of N2 is 14 and the atomic weight of O2 is 16, so O2 is 14.29% heavier. Is someone out there serious about suggesting that this small increase in weight is enough to cause a significant stratification of nitrox? Brownian movement is a very powerful thing you know - there are butterflies which can smell a possible mate from over 2 miles away...

[Alun]

Originally Posted by uwila

there are butterflies which can smell a possible mate from over 2 miles away...

That's nothing, the men of Grimsby can do the same thing from 5 miles...