Scuba Tank Pressure Too high?

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TenMetrePeter
Posts: 603
Joined: Sun Sep 04, 2016 10:59 am

Re: Scuba Tank Pressure Too high?

Post by TenMetrePeter »

hundert wrote:all 200 bar air pistols withstand 300 bar pressure, they're tested for that.
A typical body of an air pistol will hold out a even more pressure than 300, the material is thicker than in the cylinder.
WHAT!! No no no. Use the gauge! Never go over the specified pressure. Some cylinders will permanently deform at the threads at 300 as a safety feature.
If the cylinder has its own gauge it will be damaged too.

If the OP is wanting to equalise an overfilled tank with a 200 bar cylinder with no gauge then (s)he needs to change fill method to the recommended one.
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SlartyBartFast
Posts: 579
Joined: Fri Jun 10, 2016 11:04 am
Location: Montreal, Québec, Canada

Re: Scuba Tank Pressure Too high?

Post by SlartyBartFast »

TenMetrePeter wrote:WHAT!! No no no. Use the gauge! Never go over the specified pressure. Some cylinders will permanently deform at the threads at 300 as a safety feature.
If the cylinder has its own gauge it will be damaged too.

If the OP is wanting to equalise an overfilled tank with a 200 bar cylinder with no gauge then (s)he needs to change fill method to the recommended one.
I was going to jump all over that post until I saw this response on the next page.

That wrongheaded thinking, if the tank is tested to 5/3 of working pressure why can't I use my 4000psi tank at 5000psi, got a few people injured in Paintball.

Fill cylinders to their working pressure only and never beyond. If you're regularly over pressurising the tank (even briefly) or worse, aren't sure of the tank pressure, you're doing it wrong.

If you want to make sure every one is safe, get a regulated fill station.
- Smith & Wesson SW22 Victory
- FAS SP607
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