Tank pressure for storing. Nitrox only.

[tbone1004]

yeah that doesn't make any sense to me, especially when it goes against what the manufacturer recommends for their cylinders. For reference, a full AL80 has to reach almost 400F for the burst disc to go at 4500psi. Also they don't use burst discs anywhere else in the world, so I don't subscribe to that. Steels stay full ish, but that is usually around 2500psi or so because I don't fill after my last dive in cave country, and aluminums get sucked down to 300-500psi if at all possible if they are sitting more than a month

 

[Jax]

The article came out about the time someone dropped an AL40 full of oxygen and it blew up on him.

 

[tbone1004]

ok, so now we have to go back to why Ricks tank exploded, so make sure you know the story. Rick's tank caused the fire and he lost his arm. Why? It wasn't properly O2 cleaned, he sued the shop that did it over it, and it is what it is. Nothing about storage pressure or burst discs would have changed the outcome of that incident.

 

[Jax]

From Storing of CO2 Cylinders - Catalina Cylinders

Not nearly as full explanation, but:

Safety relief devices of CO2 cylinders are designed to operate when the pressure of the cylinder exceeds 2800 – 3000 psi (depending on the design of the safety relief device). A properly charged CO2 cylinder could vent through it’s safety relief device at approximately 150 oF (65.6 oC). A slightly overfilled CO2 cylinder could vent through its safety relief device when exposed to a much lower temperature. The CGA recommends that CO2 cylinders be stored in areas with a temperature less than 125 oF (51.7 oC).

The article I read stated that a cylinder with a half fill could actually weaken from the heat before the burst disk goes.

 

[Jax]

ok, so now we have to go back to why Ricks tank exploded, so make sure you know the story. Rick's tank caused the fire and he lost his arm. Why? It wasn't properly O2 cleaned, he sued the shop that did it over it, and it is what it is. Nothing about storage pressure or burst discs would have changed the outcome of that incident.

You have misunderstood. I simply said the article came out at about the same time. Not that it had anything to do with it. And I don't know if Rick was the story or not.

 

[tbone1004]

yeah, that recommendation is there, however you have to determine the risk of fire in the area the bottles are stored against pressure....