OMS HP 3400 tanks

[wrek]

I was just on the OMS site, and read that they are phasing out painted LP tanks with HP 3400 tanks. I was finally, just about to buy an LP 80, (My first tank purchase) and now I am a bit confused.

They say that they will be supplying the new HP tanks with the same liquid capacity as the LP ones.

I thought an LP 80 and an HP 80 had the same basic liquid capacity (80 cu ft), regardless of the PSI, so you have the same amount of air, and that LP tanks were actually safer due to lower operating pressure. Am I correct?
If not, please explain, as I am not sure why OMS would switch to HP 3400.

Also, are they phasing out all LP tanks, or just the painted ones?

Thanks,

Rick

 

[teknitroxdiver]

About the OMS tanks--they appear to be clones of the PST tanks, except for the magical LP120.

About the LP/HP volume--The HP will have a smaller liquid capacity than the LP assuming the same rated gas capacity (80cf). This is because by operating at a higher pressure, the HP tank can fit more gas in the same space, or the same amount of gas in a smaller space.

Actually the pressure is 3442 psi.

 

[wrek]

I stand corrected on HP pressure. (it was a rough guess)

So, any comment on whether the LP is still a god option?

 

[spectrum]

I stand corrected on HP pressure. (it was a rough guess)

So, any comment on whether the LP is still a god option?

Bouyancy still beats the snot out of an AL-80. As you said it's a low stress, easy to fill tank that can be found for a pretty nice price. The trade-off to HP is a larger and heavier cylinder.
Reference: http://www.huronscuba.com/equipment/scubaCylinderSpecification.html

E7-80s for $205 were hard to pass up.

Pete

 

[rescuediver009]

I have a pair of the 119s and they are great for buoyancy, capacity, size. EVERYTHING. Great tanks, The 119's are the same size as LP 98's. They make great singles too.