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Careful, awap, you're going to put LDS's out of business! Seriously tho, all the invention of the eddy current did was save Luxfer and Walter-Kidde money. And placed the financial burden on LDS's in the form of an overpriced machine. The alternative would've been recalling all 6351 tanks - but...

Read cited letter again. A cylinder may not be filled unless it conforms with the HMR. By cylinder I mean any cylinder that was made by an approved manufacturer - these are the DOT markings. Only these cylinders are allowed to have DOT markings on them. And again, it does not have to be a...

1) For a cylinder to be marked to indicate manufacture in accordance with the HMR Any DOT stamp you see on your cylinder (DOT 3AL-3000) is a stamp that manufactures are allowed indicating the cylinder is a DOT certified cylinder made of Aluminum with a service pressure of 3000 psi. *The REE...

Bubs, you always calibrate BEFORE you do the actual testing.

If you're in the United States and I'm assuming TX in this case means Texas, your SCUBA cylinder will say something like DOT 3AL-3000 or DOT 3AA-2400. These are both Department of Transportation markings, and are covered under 49 CFR sections 180.1 to 180.201 roughly. Any cylinder in this...

A Brass brush on old hydro stamps will remove any flash rust nicely. You won't remove any metal because the brass is a softer metal. That's a plus for longevity of the cylinder. Paint pens work well if you take your time. Don't use any agressive chemicals.

The tanks exploding referenced as 'horror stories' were not that old when they happened. You're right tho, in reality the danger is most likely overstated. But do you know which tank out there is about to fail hydro? Chances are it's not yours of one you will ever see but it could be. Playing...

Any cylinder used in the US is required by DOT to have a burst disk. The burst pressure cannot be higher than test pressure. Yes, burst disks do protect the fill-station operator. They also protect your vehicle or your home should the pressure in the cylinder reach a dangerous level. 3000 psi...

Trance, if these tanks do not have "VE" stamped after the new hydrotest dates, they are not legal for use. Your tanks MUST have an eddy current test done. If the shop says they did the VE, ask for a copy of the VIP as this will have the serial number and model number of an eddy current machine...

xtremesk8ter314, go back to the shop that did your 'eddy current' test. DEMAND your money back for the test immediately. Eddy current tests are not required for any tank that is not 6351-T6 alloy. A 2010 tank is definitely not 6351. Not only is the test not required for your cylinder, but the...

That is not the law BRT. If your tank is out of hydro, you can transport an empty cylinder to be tested. The above link states that the law applies to private parties, with the exception of the PRE-Transportation law. In the letter of interpretation there is a reference to shipping (via UPS...

is this an aluminum or steel tank????

for flash rust, you can easily 'whip' the tank yourself. stainless steel wire like described above would work but NEVER use it on an aluminum tank. you will remove metal and could get the cylinder condemned. you can make a whip for cheap or buy one for around 60 bucks.

if it's just light rust, whipping should do fine. anything above flash rust usually progresses quickly. also, make sure you do not use a steel whip on an aluminum cylinder. steel is harder than the aluminum. you will remove metal and that is enough to condemn a cylinder under DOT. hydrotest dot...

akdeepkiver, Just like running into a tree isn't necessarily illegal. Too bad visuals aren't required by law annually. Anyway, not just any dive shop can condemn cylinders. By regulation (you can find the entire CFR - Code of Federal Regs online for FREE at www.ecfr.gov - 49 CFR applies to...

Aren't VIP's required annually? I was always under the impression that its a requirement. Even carbon fiber tanks require an informal inspection at time of fill. Also, if your dive shop if condemning cylinders make sure they are certified thru DOT. They must have a RIN number (Requalifier...

I stand corrected. The Department of Transportation NOT ONLY requires the cylinder to be hydrotested if transported on any public roadway (in commerce) but also if it is NEVER transported in commerce. Here is a quote from DOT. "Any cylinder marked to certify that it conforms with the HMR must be...

The Department of Transportation requires any tank, scuba or otherwise to be tested every 5 years (with unrelated exceptions). You can look up specific rulings on ctcseminars.com that's the easiest place I was able to find it. So no joe blow will probably not be fined when he's filling his tank...

YES they absolutely need it! Search for 6351 deaths or incidents. You will come across some very disturbing info. A man was severely injured or killed (forgive me I have read too many articles) by a 6351 tank a few years ago. DOT was notified so they investigated as usual. Here's where it gets...