[PSUBS-MAILIST] Wanted: Aluminum I-beam

Tue Jul 10 20:36:35 EDT 2018

Hi Hank,

I have that cylinder right outside and I was going to chop off one end and use a flat plate 80mm thick against a welded O’ring flange with a couple of  fillet welds. One outside and one inside.  The ASME welder was only going to charge me $120 for the weld using SP rods.

Only problem is that The guy that I wanted to rent it to is wanting it all Kosher approved which I cant do with the CNG cylinder.  I like your idea but the rods would need to be 4140 or such and could cost a bit by the time they are all machined up as my calc was about 20 rods 1” diameter approx..   But like everything you start on a project and the goal posts keep moving.  I like the no welding approach though.  Trust you to come up with that one.

Thanks for the ideas.  Hugh

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of hank pronk via Personal_Submersibles
Sent: Wednesday, 11 July 2018 10:57 AM
To: Hugh Fulton via Personal_Submersibles
Subject: Re: [PSUBS-MAILIST] Wanted: Aluminum I-beam

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: 

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

_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20180711/c0d53583/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 4826 bytes
Desc: not available
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20180711/c0d53583/attachment-0001.jpg>