Posted by Ken Kurtis on October 31, 2001 at 01:01:39:
I'm taking the liberty of copying and re-posting this from Tom Ivey, who's one of the big guns at Pressed Steel, makers of tanks. I've known Tom for quite some time and bottom line is that he knows what he's talking about. Tom posted this on the over-filling thread, but it's so far down the page now (I just stumbled across it by chance) that I think a lot of people might miss what he has to say.
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Posted by Tivey on October 30, 2001 at 14:32:19:
In Reply to: Over filling tanks posted by Captain Tim on October 22, 2001 at 18:11:56:
Captain-
You did the right thing; the service pressure that's permanently stamped in the shoulder of the tank is actually the maximum service allowed. If the tank is a LP series 3AA-2400 psi they normally have a 10% plus fill for maximum service pressure of 2640 psi. PST makes both version LP (2400 psi) & (HP 3500 psi). The HP series is designed under a special exemption permit E-9791. The long and short of it is the existing DOT-3AA spec will not pass all of the necessary tests to be approved by DOT for a higher service pressure, hence the reason of the for our special exemption.
Federal law governs the handling, filling, transporting and retesting of all scuba cylinders under Title 49 of the Code of Federal Regulations.
Pressed Steel Tank Company has been producing quality products since 1902.
TI