Can someone cite a single instance of an overfilled lp steel rupturing? I won't hold my breath...
yESW THER ARE SOME I WOULD HAVE TO LOOK IN MY psi MANUAL FOR THE DATES DN PLACES.. oops
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Can someone cite a single instance of an overfilled lp steel rupturing? I won't hold my breath...
Roughly and usually 5/3's working pressure, or Hydro Test pressure.
Some MFG's will go slightly less.
You will find the Burst Disk rating stamped into the burst disk usually along it's edge.
2400psi working has a 4000psi burst disk
3000psi working pressure has 5000psi burst disk
3442psi working pressure has 5250 burst disk
Fun Fact:
You will see some valves have a "PSI Service Pressure" label on them.
A 3000psi Service Pressure Label means it's for a 3000psi working pressure tank (ie. Al 80)
Ergo the burst disk should be 5000psi. The pressure label on the valve doesn't signify when the burst disk goes.
And some dumb dumbs can swap in the wrong burst disk or wrong "valve" with incorrect burst disk for the tank's working pressure. Something to look for when shopping used tanks.
I just recently purchased 2 AL80's and 2 LP95's
the AL80"s have 5250's on them and the LP95's have 4000's on them, should i swap the LP's to 5000psi disks, i plan on filling them to 3800 and let them settle cooled around 3600 as my first stage is a yoke rated to 3600psi.
will the 4000psi burst disks weaken overtime filling to 3800?
also off topic, will i be ok filling an AL80 to 3500 cold?
Absolutely NO to swapping those burst discs, because you compromise the safety feature on your 2400psi LP95's. They are hydroed to a 4000psi test pressure; if say your tanks were heated and the pressure exceeded 4000psi, the 5000psi burst disks wouldn't go. Now you risk the tank shattering because it's way above it's working pressure & hydro test pressure. It's placed beyond it's testing pressure requirements, so ie. fancy bomb you got there now.
The burst disc's purpose is to prevent that, which is why it came with 4000psi burst disc.
Also I don't recommend hot fill or cave fill; yes I'm being an evangelical PSI Inspector. If you want the added volume, buy a bigger tank, learn to dive with a stage, or learn doubles.
What I recommend is fill it at a rate of 100psi/10seconds and top off the 300psi lost after it cools down.
4-5 minutes to fill those tanks. That's nothing for personal filling. 20 minutes out of your day if you're filling one at a time.
Can you get away with filling a Al 80 to 3500 and leaving it? Sure if it's integrity is stable. The most dangerous time for a tank to fail or a valve to fail is when you're filling or increasing the internal pressure (say from heat).
As for your reg yoke rated to 3600psi, I personally like staying well below pressure ratings. If it says 3600psi I'll blindly assume it shatters above that; why? Because the first stage usually sits near my manhood when I'm turning the tank on and I like my manhood the way it is. Even though yes, the Mfg's usually put a conservative rating on it, but I don't know what that actual avg number is.
Fill your cylinders to what ever psi you are comfortable with. 24/7
Fill your cylinders to what ever psi you are comfortable with. 24/7