steel LP 77 overfills .. question

[rjack321]

C...

Being fill station certified...

As an example...if a LP cylinder has a 2450 PSI WP...it should be filled to 2450 PSI...if the same cylinder has a +10% stamp..then the fill operator...may fill it to 2695 PSI...that's it...

If the owner of the cylinder requires more gas volume...then he/she should be purchasing larger capacity cylinders...or consider becoming rebreather certified...SCR...10 times more efficient than open circuit...CCR...40 times more efficient than open circuit...

What is possible is one thing...anything over and above ''safe standard industry practice'' not authorized by the manufacturer is wrong....

Any shop/certified fill station operator who is knowingly over-filling cylinders by as much as 1000 PSI should be reported and have their certifications revoked...any insurer would cancel policies if it was known over-filling cylinders was common practice in a business for which they were providing accident/liability insurance...

Those of you who are gnashing your teeth while reading this post...I'm not really interested in knowing how long you have been over-filling your cylinders without incident...wrong is still wrong...incident free or not...

W...

Yawn
Please we have heard this so many times in some many ways.
Yes everyone dies. Can we move on now?

 

[rjack321]

I am brave... And I can stay down a long time on a pair of 72's... lol

I guess whatever suits your fancy. Not much (proportionally) different than filling lp85s to ~3900 except that 2250+ lp72s are 40+ yrs old and have really thin walls to start with - so even a tiny amount of corrosion is a potentially significant weakness. I keep mine to 2800 but I also have lots of other bigger tanks.

 

[runsongas]

meixner must be the guy driving at the 90 kph speed limit on the highway ... getting honked by the line of cars behind him for holding up traffic

 

[W W Meixner]

meixner must be the guy driving at the 90 kph speed limit on the highway ... getting honked by the line of cars behind him for holding up traffic

ROG...

Ha...Ha...I'm the only one in our area with one of those ''infernal machines''...everyone else is in horse and buggy...I only have a buggy whip snapped at me occasionally for driving too slow...further...

From a 3AL S50...I get three 30 minute 130' dives...including stops...with gas to spare...

With no cylinder over-filling req'd...there is a right way...

W...

 

[divinginn]

I keep mine filled to 3000,a good happy medium without pushing it.

 

[Basking Ridge Diver]

a good happy medium without pushing it.

So you overfill and think you are not pushing it? Interesting concept - so if you filled to 3200 and let it cool to 3000 - would that be ok too?

What seems funny to me is everyone has an idea of what is pushing it - but where do we get the boundary line? At what point do we say we are not pushing it? I will guarantee it is not a scientific line that any of us has measured...

Once you step over 2250 psi are we all pushing it?

 

[BRT]

So you overfill and think you are not pushing it? Interesting concept - so if you filled to 3200 and let it cool to 3000 - would that be ok too?

What seems funny to me is everyone has an idea of what is pushing it - but where do we get the boundary line? At what point do we say we are not pushing it? I will guarantee it is not a scientific line that any of us has measured...

Once you step over 2250 psi are we all pushing it?

When we start seeing some failures we are pushing it.

 

[W W Meixner]

So you overfill and think you are not pushing it? Interesting concept - so if you filled to 3200 and let it cool to 3000 - would that be ok too?

What seems funny to me is everyone has an idea of what is pushing it - but where do we get the boundary line? At what point do we say we are not pushing it? I will guarantee it is not a scientific line that any of us has measured...

Once you step over 2250 psi are we all pushing it?

BRD...

Anything over manufacturer stamped working pressure is pushinig it...

Those who would argue...about over-pressurizing during re-hydro..

This work is being performed by a trained professional...under controlled circumstances...on a specialized machine...for a very short duration...

Gas expansion from being in a hot car is a good reason why cylinders should only be filled to WP...

On some of these threads I hear DIR constantly...but then it seems acceptable to over-fill an old LP cylinder by as much as 1000 PSI...

I've taken the fill station operator's course...as well as the hydro-static testing course...I understand the logic...I've reviewed the accident statistics...and if resources allow...will only fill to stamped working pressure...allow cylinder to cool down and top up...mine or anyone elses cylinders...and won't allow my cylinders to be over-filled by anyone else...

I can't see any reason to tax an old 72...when if more gas/range is required...there are H P steel 80's...100's...117's...120's...133's...and 149's...or...rebreathers...

DIR...

W...

 

[runsongas]

by that logic, tanks should be filled to less than the rated working pressure after easter until halloween just in case they are stored in a hot car during the summer

 

[NAM001]

my lp's hydro like new adn are normally filled to 3500 or more. 4k dfor cave fills. I dont store them full i drain tham down fo rteh winter to a few hunmdred #. the higher the psi the greater the condensation when they cool to say the 30's Psi and temp are both mechanical forms of causeing condensation. That will depend on how good the chemical moisture removal was working at time of fill. If by chance you used something like RIX with no chemical filtering you will get a wet tank inside if temps drop. A lot more if the BPR is set to say 1500 for the moisture separators and you fill to 3k or more. dew points can easily be in the low 30's to low 40's. The higher the psi the higher the dew point.