[PSUBS-MAILIST] Wanted: Aluminum I-beam

[hank pronk via Personal_Submersibles]

 Hugh,If I were building a low cost chamber of that size, I would take a type 1 CNG steel tank  that is 12 in dia and cut one end off.  I would cut the tank to required length and machine the end that is cut and machine the head end as well.  Then I would machine a ring that both ends fit into with an o-ring.  I would make two rings that go over the heads but won't slide over.  I would drill those rings for stay bolts to holt it together.  No welding required.Should be under 1,000 dollars to build.  Just a thought.Hank
    On Tuesday, July 10, 2018, 4:02:33 PM MDT, Hugh Fulton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
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Hi All,  Need some input.   Pressure test rigs.

Looking for ideas for a 1000 meter depth test vessel for ROV’s.

I have done a basic design using 12” Sched 120 but by the time it is design approved etc it is getting up to USD $5,000 plus.

Initial design was for a quick release 8 lug twist lock.  As I looked at using Flanges and bolts but the weight gets a bit horiffic with the flange studs and nuts coming to over $600  without the cost of the flanges.

A 24 inch test vessel would be better but 12 inch would suffice for now.  The concept drawing is as below.  Cheers,  Hugh

  


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