RE: [PSUBS-MAILIST] Serious Steel

Brent,

If you acquire these steel tubes, you also have to consider that you are going to have to get some more steel of the exact same type to complete the hull. Long term, it may not be such a good deal after you find out about what heats are needed for the welds to maintain the steel’s strength and minimize later crack development.

R/J²

Respectfully,

Jay K. Jeffries

Andros Is., Bahamas

It is the mark of an educated mind to be able to entertain a thought without accepting it.
- Aristotle

From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brent Hartwig
Sent: Wednesday, February 21, 2007 5:54 PM
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Serious Steel

Alec,

That should be fairly easy to check, thanks for the heads up. Both tubes have/had heavy support at both ends, like that very heavy door to help keep it in the shape it was welding in at, but I'll check carefully. I don't see any dents in them either, just surface scratches and a very light coating of oil in some areas.

I wasn't planning on using these thick tubes on my first two subs, but later on since the first two subs are of a much lighter gage steel hull. But when I get to that point, they sure would save allot of money if they turn out to be good quality tubes. I won't know how deep that sub would be able to go until I can get more data on the steel and finish my design for the external ring supports like used on the Alicia and do the crush depth calculations with added syntactic foam to the entire exterior of the pressure hull. Also I have to be careful when choosing my desired depth rating since as you well know every thing gets really expensive as you go deeper. I'm working on a couple of utility patents at the moment and perhaps one or both of them will better support the cost of a deep diving glider sub with great surface stybility.

Regards,

Brent

From: "Smyth, Alec" <Alec.Smyth@compuware.com>
Reply-To: personal_submersibles@psubs.org
To: <personal_submersibles@psubs.org>
Subject: RE: [PSUBS-MAILIST] Serious Steel
Date: Wed, 21 Feb 2007 11:55:48 -0500

Brent, make sure it's got NO out of roundness, because with that sort of thickness I have no idea how one would get it properly round if it's not so to begin with...

Alec

From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On Behalf Of Brent Hartwig
Sent: Wednesday, February 21, 2007 11:28 AM
To: personal_submersibles@psubs.org
Subject: [PSUBS-MAILIST] Serious Steel

Ya, I should of wrote it as 1.1875"

http://www.frappr.com/?a=viewphoto&id=2628470&pid=4202707

http://www.frappr.com/?a=viewphoto&id=2628470&pid=4202708

Both steel tubes have one seam weld that was ex-rayed. The tubes are 39" OD and 1.1875" thick steel. Type of steel is unknown at this time, but since they were part of a natural gas pipeline it should be good material. I'm getting a digital metal tester that will tell me what type of steel it is.

The weight is 4100 lb. for the 8.5" section, which comes to 512 lb's per lin. foot. The other tube could be about 11.5' when the rest is removed.

This would be used for a pretty deep diving sub, and would require a hell of allot of hard and soft ballast systems including syntactic foam. I can get both of these for 10 cents a pound, so I can't really loose. To have steel of this size and quality rolled, professionally welled, and ex-rayed, would cost a hell of allot more then $400 or $600 I would pay for these. I'm still debating this in my head so I could use some good imput and a big flatbed truck.

Regards,

Brent

From:  "Paul Kreemer" <paulkreemer@gmail.com>
Reply-To:  personal_submersibles@psubs.org
To:  personal_submersibles@psubs.org
Subject:  Re: [PSUBS-MAILIST] Single minded pursuit
Date:  Wed, 21 Feb 2007 07:24:40 -0800

I think it's 1 and 3/16 thick

On 2/21/07, Joseph Perkel <joeperkel@hotmail.com> wrote:

Brent

3/16" doesn't allow much room for corrosion.

Just finished the detail work for the hull shell, end caps, and rings,

....the works at this point weighs 1880 lbs, 42" diameter, 3/8" thickness,
same length as before.

Yes, using Flamingo bundled with Rhino Marine.

Joe

>From: "Brent Hartwig" <

brenthartwig@hotmail.com>
>Reply-To: personal_submersibles@psubs.org
>To:

personal_submersibles@psubs.org
>Subject: RE: [PSUBS-MAILIST] Single minded pursuit
>Date: Tue, 20 Feb 2007 22:44:21 -0800
>

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