Re: [PSUBS-MAILIST] Re: Suplies

I have built, modified and repaired a few pressure vessels over the years and work with high pressure piping regularly and I have never heard the term "pressure vessel quality material". Vessels are made from a WIDE range of materials and pipe is too, depending on a lot of factors. I would venture that there is no grade of steel available for building a vessel that is not available as pipe. Pipe is inevitably attached to a vessel, that pipe equals or exceeds the mechanical properties of the vessel itself. Could you be specific in exactly what steel you are suggesting?

JTMcC.

----- Original Message -----

From: Dan H.

To: personal_submersibles@psubs.org

Sent: Wednesday, February 18, 2004 6:28 AM

Subject: Re: [PSUBS-MAILIST] Re: Suplies

Marcus,

Sorry but I don't have any help for you with sources in your area.

Have you found seamless pipe as large as you need for a hull??? I'm pretty sure any pipe you find that big is made of welded plate anyway.

End caps are made to size but you have to pick out a size that is available off the shelf to get it at a price you can afford. Tooling charges are high for special sizes. Contact a supplier to find what they have as standards. You probably should consider building out of pressure vessel quality material since it's not much more then common carbon steel anyway.

Dan H. USA

----- Original Message -----

From: Greeff, Marius (M)

To: personal_submersibles@psubs.org

Sent: Wednesday, February 18, 2004 3:16 AM

Subject: RE: [PSUBS-MAILIST] Re: Suplies

If one roles a piece of plate it will have a weld compared to seemless pipe, would a piece of seemless pipe not be the stronger solution? Endcaps can be made to size unless I have been wrongly informed. I found that a lot of the suppliers mentioned are Amerian based, is there any one around South Africa in this group with advice as to where they got there material and gauges?

Marius

-----Original Message-----
From: Dan H. [mailto:jmachine@adelphia.net]
Sent: 18 February 2004 03:56
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Re: Suplies

Mark,

Why use pipe? Why not design what you need and have the hull rolled out of plate. You'd have better control on the trueness of the shape and you could use pressure vessel quality material.

Dan H.

----- Original Message -----

From: Mark Woodward

To: personal_submersibles@psubs.org

Sent: Tuesday, February 17, 2004 8:17 PM

Subject: [PSUBS-MAILIST] Re: Suplies

Hi all,

I have been working on my design for my personal sub. But I am having a problem find materials. Such as steel pipes. To which my design is based on.

Any Help would be great!!

Thanks, Mark...

Mark Woodward

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