Hello James,
Thank you for the data to chew on. I'm guessing that one way or another it should be pretty good steel for pressure vessal's, but how good is the trick question. From what I've been told, we have a large natural gas pipe line coming down from Canada near Sandpoint, Idaho and it sounded like these came from that line. They don't look to be the main line tubes, but rather small off shoot sections made for humam access for maintenance. James from the pic of the longer section that has not had the door cut off of it, what exactly do you think that section was for? Do you know of a good way to test the steel to get the whole or most of the tail? I don't know any thing currently about H2S but if it was, what difference would it make in the steel or the usability of it.
Are you guys ex-raying your welds of UT (Ultrasound Testing) now days? I have a friend that repairs and welds on very large pressure vessels, and they don't ex-ray the welds since he says they get much better indepth data from the UT data. One down side of the UT process, is applying and then removing the gel that is used, sorta like a ultrasound done on a human mother.
Regards,
Brent
From: James Barlow <jbarlow@bjservices.ca>
Reply-To: personal_submersibles@psubs.org
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Serious Steel
Date: Wed, 21 Feb 2007 12:39:24 -0700
Hi Brent,
Pipeline steels are from a different series than plate steel (boiler plate) that is normally rolled. They are tsomething like API 5L X42 and go up to about X100 where the Xxx is the yeild st in ksi.
A hardness test may not tell the whole tale. Was it used line pipe, if so then you should check if it was used in SOUR GAS (H2S) or not.
Thanks,
James Barlow RET
Sr. Mechanical Designer
New Product Development
BJ Pipeline Inspection
www.bjservices.com/inspection
"Brent Hartwig" <brenthartwig@hotmail.com>
Sent by: owner-personal_submersibles@psubs.org21/02/2007 09:28 AM
personal_submersibles@psubs.org [PSUBS-MAILIST] Serious Steel
Ya, I should of wrote it as 1.1875"
http://www.frappr.com/?a=viewphoto&id=2628470&pid=4202707http://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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