Luxfer 14cuft 2015 psi Cylinder - hard to find - new hydro $125 shipped

[davehicks]

I mean, you can fill any tank to 2000 psi and call it full? That AL19 is essentially an AL14 at 2000 psi, just slightly less positively buoyant?

And quite a bit heavier and taller. Not as good as the S14. I even fly with these as they are such a great form factor.

 

[jborg]

And quite a bit heavier and taller. Not as good as the S14. I even fly with these as they are such a great form factor.

Yeah. A Catalina S19 is 0.9 inches taller and 2.4 lbs heavier. Certainly 2.4 lbs is not nothing, especially when flying, but also it might not explode and can hold more gas if you can get the fill, so I guess you win some you lose some.

 

[davehicks]

Yeah. A Catalina S19 is 0.9 inches taller and 2.4 lbs heavier. Certainly 2.4 lbs is not nothing, especially when flying, but also it might not explode and can hold more gas if you can get the fill, so I guess you win some you lose some.

I feel like you are just being argumentative to no end. Can't you just conceed that for at least my use case this is a better solution? There is no downside for me.

Ps: Plenty of people pay an extra $1000 for a titanium 1st stage and don't save anything close to 2.4 lbs. This has serious value.

 

[Zef]

I feel like you are just being argumentative to no end. Can't you just conceed that for at least my use case this is a better solution? There is no downside for me.

Why are you even perpetuating the discussion? You obviously have accepted the risk of using a cylinder made from a dubious alloy....you don't need anyone's permission to continue, so why do you seem to be seeking approval for your decisions and actions?

-Z

 

[Tracy]

I mean, you can fill any tank to 2000 psi and call it full? That AL19 is essentially an AL14 at 2000 psi, just slightly less positively buoyant?

shhhh, you will ruin the appeal of this cylinder.
Not just Davehicks, there are a lot of people that really like the cylinders. Most of them have a hard time understanding the relationship of volume and pressure.
There are some that like how light it is. They are noticeably lighter. The wall thickness of an AL14 is close to 3mm as opposed to an al19 which is over 8mm. I can measure exactly if you are curious as I have cutaways of both at the house.
Most of them are hung up on full versus not full and never take the time to understand they have the same amount of gas.
It is the same reason people people still buy LP versions of steel tanks available in a direct HP version.

 

[jborg]

I feel like you are just being argumentative to no end. Can't you just conceed that for at least my use case this is a better solution? There is no downside for me.

I apologise, I didn't mean to be unnecessarily argumentative. I mostly reacted to the (paraphrasing, apologise again if unfair) bit about the AL14 being so nice because you get a full fill at 2000, while the AL19 only gets a short fill because the operators can't do better, when in effect they're the same at that point (barring the weight difference).

 

[-JD-]

Why are you even perpetuating the discussion? You obviously have accepted the risk of using a cylinder made from a dubious alloy....you don't need anyone's permission to continue, so why do you seem to be seeking approval for your decisions and actions?

-Z

Actually, they continued to be made after 1988 when ALL use of 6351 STOPPED by LUXFER. (See my references and @OMyMyOHellYes post upthread) So there are certainly 6061 versions of these around. What were are digging at now is WHEN the change-over occurred or if they were possibly always made from 6061. (Skimming your report implies that it was likely not sold as a SCUBA cylinder and may have different size and maybe material)

 

[davehicks]

shhhh, you will ruin the appeal of this cylinder.
Not just Davehicks, there are a lot of people that really like the cylinders. Most of them have a hard time understanding the relationship of volume and pressure.
There are some that like how light it is. They are noticeably lighter. The wall thickness of an AL14 is close to 3mm as opposed to an al19 which is over 8mm. I can measure exactly if you are curious as I have cutaways of both at the house.
Most of them are hung up on full versus not full and never take the time to understand they have the same amount of gas.
It is the same reason people people still buy LP versions of steel tanks available in a direct HP version.

Obviously, it's about the weight and size. And the volume/capacity comparison at 2000psi applies to the 13cf bottles, not 19cf options.

I've used 13cf, 19cf, and the 14cf 2015 bottles for O2 over the years. The 13s and 19s are heavier than the 14s. The 19s are also larger. The 13s are smaller and at 2000psi they hold LESS than the 14cf. Is that not clear?

The 14cf 2015 bottles have the best combo of capacity and weight of the available options.

 

[davehicks]

Why are you even perpetuating the discussion? You obviously have accepted the risk of using a cylinder made from a dubious alloy....you don't need anyone's permission to continue, so why do you seem to be seeking approval for your decisions and actions?

-Z

All of my Luxfer 14cf 2015 tanks were manufactured in 2007, many years after they stopped using the dodgy aluminum alloy. There is nothing unsafe about the tanks.

 

[Tracy]

I've used 13cf, 19cf, and the 14cf 2015 bottles for O2 over the years. The 13s and 19s are heavier than the 14s. The 19s are also larger. The 13s are smaller and at 2000psi they hold LESS than the 14cf. Is that not clear?

It is very clear to most everybody.
a 13 and a 14 aren't even similar. One is a 2L bottle and the other is a 3L bottle.
An AL19 and a 14 are almost the same size. Less than an inch difference between the 2. They are both 3L bottles.
Yes, weight is different. For most people that doesn't matter, for some it does. There aren't many divers flying with tanks.
Volume is the same, if you are only filling them to 2000, you have the same amount of gas. If you won't ever fill them above that, there would be no reason to use a 19 over your 14.
If you travel to places that can fill them up, you could have more gas with the 19 while taking up the same footprint.