O2 Cleaning tanks

Been lurking on this newsgroup for a while but never really posted before so
here goes .....

I put my 15ltr and 3ltr tanks in for an O2 clean ready for my Nitrox course.
Went to the dive shop today and was told the tanks had to be sent off for
shot blasting as they has signs of rust in them. The 15ltr tank is about
3or4 months old with about 10 dives and the pony about 5-6months old with
about 15 dives. It's was explained to me that some water may have got in at
some point. I've only ever had them filled with clean air, so I'm a bit
puzzled as to how water could have got in.

Can water get into a pressurised container except when it's being filled?

Does this sound right to you guys?

I trust the staff at the dive shop implicitly, I've dived with them and
the've given me lots of very good advice in the past. I'm certain they are
not giving me a line.

I'm still a relatively inexperienced diver having only logged 23 dives, so I
call on the experience of you guys.

thanks

Dan Greenway

> I put my 15ltr and 3ltr tanks in for an O2 clean ready for my Nitrox
course.
> Went to the dive shop today and was told the tanks had to be sent off for
> shot blasting as they has signs of rust in them. The 15ltr tank is about
> 3or4 months old with about 10 dives and the pony about 5-6months old with
> about 15 dives. It's was explained to me that some water may have got in
at
> some point. I've only ever had them filled with clean air, so I'm a bit
> puzzled as to how water could have got in.
>
> Can water get into a pressurised container except when it's being filled?
>
> Does this sound right to you guys?
>
> I trust the staff at the dive shop implicitly, I've dived with them and
> the've given me lots of very good advice in the past. I'm certain they are
> not giving me a line.
>
> I'm still a relatively inexperienced diver having only logged 23 dives, so
I
> call on the experience of you guys.
>

Honestly, have you ALWAYS had at least 20 bar in your cylinders?
Has there EVER been an occasion where you sucked it dry/used all the pony
etc?

As long as there has been at least 20 bar, chances of moisture getting in
3-4
months from new are almost zero. Get in touch with whoever sold them and
tell
them the circumstances. More likely is that they were corroded when you
bought
them.

If you bought them off the same LDS that are now wanting to charge you for
testing then I would be extremely aggrieved.

I would suggest that you find out where they have sent them (not difficult
each
area only has one/two places) and ask the testing stations opinion.

From now on write everything that everybody says down.
Who said it, time & date. Dont be afraid of writing it in front of them at
the store.

Start collating info and asking lots of questions. Sounds to me like you
have been
suckered.

TerryH

On Sat, 19 Jun 2004 19:49:10 +0100, Daniel Greenway wrote:

> about 15 dives. It's was explained to me that some water may have got in at
> some point. I've only ever had them filled with clean air, so I'm a bit
> puzzled as to how water could have got in.

Some dive shop somewhere has given you one or more wet fills. It's
happened to me in the past too. Annoyingly it's impossible to prove who's
at fault.

Jason

--
http://www.scuba-addict.co.uk/ for Australian trip reports including
New South Wales, Queensland, Victoria and Western Australia

"TerryH" <terry@maxgsd.freeserve.co.uk> wrote in message
news:cb24jm$tuf$1@news5.svr.pol.co.uk...
> > I put my 15ltr and 3ltr tanks in for an O2 clean ready for my Nitrox
> course.
> > Went to the dive shop today and was told the tanks had to be sent off
for
> > shot blasting as they has signs of rust in them. The 15ltr tank is about
> > 3or4 months old with about 10 dives and the pony about 5-6months old
with
> > about 15 dives. It's was explained to me that some water may have got in
> at
> > some point. I've only ever had them filled with clean air, so I'm a bit
> > puzzled as to how water could have got in.
> >
> > Can water get into a pressurised container except when it's being
filled?
> >
> > Does this sound right to you guys?
> >
> > I trust the staff at the dive shop implicitly, I've dived with them and
> > the've given me lots of very good advice in the past. I'm certain they
are
> > not giving me a line.
> >
> > I'm still a relatively inexperienced diver having only logged 23 dives,
so
> I
> > call on the experience of you guys.
> >
>
> Honestly, have you ALWAYS had at least 20 bar in your cylinders?
> Has there EVER been an occasion where you sucked it dry/used all the pony
> etc?
>
> As long as there has been at least 20 bar, chances of moisture getting in
> 3-4
> months from new are almost zero. Get in touch with whoever sold them and
> tell
> them the circumstances. More likely is that they were corroded when you
> bought
> them.
>
> If you bought them off the same LDS that are now wanting to charge you for
> testing then I would be extremely aggrieved.
>
> I would suggest that you find out where they have sent them (not difficult
> each
> area only has one/two places) and ask the testing stations opinion.
>
> From now on write everything that everybody says down.
> Who said it, time & date. Dont be afraid of writing it in front of them at
> the store.
>
> Start collating info and asking lots of questions. Sounds to me like you
> have been
> suckered.
>
> TerryH
I agree with Terry your cylinders should not need shot blasting if they have
only had 23 fills.
Your still quite new to diving and have yet to realise something's you will
have been told as fact may not quite be true.
I think suckered is a bit strong as you are questioning the cost.
who is LDS and where have you had them filled. I wonder if you have even
filled the 23 times some training dives can be very short so it is possible
to get several dives out of one fill. I think PADI states each dive must be
20 mins long but some instructors shorten this to get more students in each
day.

Im sure nobody would mind you posting your log here,but try to include where
you got each fill. this topic came up on this news group only a few weeks
ago many people were claiming to have ten year old cylinders that have never
failed a visual, others like you have had bad luck ? and needed shot
blasting very often. My own cylinders need shot blasting last year because
they were very badly mistreated before they were given to me.

hope you get it sorted

David

"Jason" <jason.news.nospam@ntlworld.com> wrote in message
newsan.2004.06.19.19.39.08.521454@ntlworld.com.. .
> On Sat, 19 Jun 2004 19:49:10 +0100, Daniel Greenway wrote:
>
> > about 15 dives. It's was explained to me that some water may have got in
at
> > some point. I've only ever had them filled with clean air, so I'm a bit
> > puzzled as to how water could have got in.
>
> Some dive shop somewhere has given you one or more wet fills. It's
> happened to me in the past too. Annoyingly it's impossible to prove who's
> at fault.

It may also have happened before they were first filled and sold.

Cliff.