Aluminum SCUBA Tank DOT Regulations
Go Back to Misc

Here is the HAZMAT advisory (issued sometime ago) and the DOT regs. These are the rules that should be quoted, especially the latter.

HAZMAT Advisory... DOT Advisory AL 6351-T6 Cylinders.pdf
DOT regs... DOT Scuba Cylinder Requalification Regs.pdf

The source of this info was from the following Email received by Ian...

-------------- Original message from Allen Sanderson <>: --------------

> Hello,
>Just stumbled across your newsletter in a web search. The article
> on the older scuba cylinders needs to be corrected.
> Aluminum cylinders that are made from the 6351 are safe to use -
> however they require an additional level of care that the newer
> cylinders do not require. This additional level of care are the eddy
> current tests. DOT issued new rules on this that are effective 01 Jan
> 07. That article should have noted this and NOT said they were unsafe
> to use.
> It did correctly note many shops are now refusing to fill cylinders
> made from 6351. That it their option but it shows that when it comes
> to the scuba industry and its ability to self regulate cylinders they
> fail.
> Sincerely,
> Allen Sanderson
> Salt Lake City