NITROX marked tanks MUST be filled to 24% or greater?

[simcoediver]

fmirkle, next time you go to that dive shop get them to give you the DOT requirement and post it here please. It is total B.S.

 

[BRT]

They've got it backwards. Under 23.5% does NOT require a Nitrox sticker, which is NOT the same thing as must not have a Nitrox sticker. Ask them to show you the regulation.

And does over 23.5% require a nitrox sticker?

 

[boulderjohn]

Nothing requires a nitrox sticker.

 

[simcoediver]

Right, just a little piece of tape with the percentage marked on it is all that's required.

 

[Scared Silly]

And does over 23.5% require a nitrox sticker?

No sticker just be O2 clean ... but that is another thread.

 

[pinshootr]

I had a shop balk at filling my nitro tanks with just air while traveling, they tried to give me that BS that they could only fill with nitrox too, it was when I ask them if they did not properly filter their air when the discussion was over and they filled my tanks!

 

[2airishuman]

I understand that there is a DOT requirement that containers (such as high pressure cylinders) be accurately marked as to contents.

There is a school of thought that filling a cylinder with air when it is marked "nitrox" is in violation of this, because then the cylinder's markings do not accurately reflect its contents. While I do not subscribe to this way of thinking, I can understand it.

 

[BRT]

I understand that there is a DOT requirement that containers (such as high pressure cylinders) be accurately marked as to contents.

There is a school of thought that filling a cylinder with air when it is marked "nitrox" is in violation of this, because then the cylinder's markings do not accurately reflect its contents. While I do not subscribe to this way of thinking, I can understand it.

A piece of tape with the mix on it will accurately describe its contents. A nitrox wrapper will not.

 

[fmerkel]

Filling a cylinder with less O2 potentially makes it more dangerous?
Contents for a NITROX tank is only about the FiO2 level.

I can see a case possibly being made that the "air only" whip is ....inferior.....and has MORE contaminants so we don't want THAT going into a tank we may later put a higher level of "enriched oxygen" from our .......better.....whip.

They have absolutely no way of knowing, tracking, or dealing with that. It's simply impossible.

Are O2 caused tank/valve fires ANY kind of a problem, anywhere, ever?
Sure, tanks do blow up, but I can't say I've ever heard of a tank igniting.

 

[wetb4igetinthewater]

Sounds like the LDS wants either of the following: you buy additional cylinders or you pay for nitrox when it may not be necessary, but may also limit your planned dives.

Like others have said, ask them to show you the DOT regulations stating such.