[PSUBS-MAILIST] Commercial Grade O2 vs. Medical

hank pronk via Personal_Submersibles personal_submersibles at psubs.org
Wed Jan 3 14:10:17 EST 2018


 Hi Sean,I am just curious how you calculated the depth of a concrete sphere.  What did you use for yield strength?  It seems to me the compressive strength should be close to the yield strength?   Just for interest sake Lafarge is producing High Performance concrete at 12,000 psi  after  12 hr cure, amazing.Hank

    On Wednesday, January 3, 2018, 12:04:32 PM MST, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
  Steve,Here in Canada we can not keep our original tank, it is swapped out.  I fill  from a 122 cu ft tank into my small aluminum medical tanks.  I think Sean's suggestion of a charcoal filter on the scrubber is a good idea to maybe pick up a nasty.Hank
    On Wednesday, January 3, 2018, 11:10:41 AM MST, Steve McQueen via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 I tried to search the archives but it wasn't very friendly.  Sorry to again ask about something I know has probably been discussed.

I wanted to double ck. my O2 strategy.  After some investigation it seems I will buy a new steel high pressure oxygen tank for external mounting. My plan is to have it refilled with "commercial grade" O2 vs. medical grade 02.  As long as I keep my "personal" tank and not allow the filler to swap tanks I should create a "chain of custody" that will help me feel good about not having contamination.

I am wondering how others are managing.

Thanks,
Steve
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