[PSUBS-MAILIST] conical transitions

Tue Jan 7 19:29:55 EST 2014

Wouldn't you figure that like an ASME nozzle--like a conning tower?
Vance

-----Original Message-----
From: brian <brian at ojaivalleybeefarm.com>
To: Personal Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Tue, Jan 7, 2014 4:46 pm
Subject: Re: [PSUBS-MAILIST] conical transitions

Would the same apply to a cylinder to sphere transition?  On mine I'm planning on a 1" thick collar welded to the sphere then the cylinder to that .

brian

-----Original Message-----
From: "Hugh Fulton" <hc.fulton at gmail.com>
Sent 1/7/2014 12:45:24 PM
To: "'Personal Submersibles General Discussion'" <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] conical transitions

Hi All,  
I have been through that problem and you have to have a good sized stiffener there of some sort.  I could not afford the room as an intrusion of internal space.
This is the solution and the angle of the additional reinforcing cone is 22.5 degrees being half the 45 degrees of the cone.  This survived an FEA analysis.  The end of the cone is where my window was attached.
This was a 48” shell  .  Regards,  Hugh

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Jon Wallace
Sent: Wednesday, 8 January 2014 8:10 a.m.
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] conical transitions

Joe, ABS says stiffened cones are to have their ends bounded by two heavy stiffeners each located as close as possible to the point of cone-to-cylinder transition.

The stiffener is not located on the weld line but as close as possible to it.

Jon

On Tuesday, January 7, 2014 5:30:16 AM, Joe Perkel <josephperkel at yahoo.com> wrote:

David,

            Is that T ring directly on the weld line, or offset any distance?

            Joe

            Sent from Yahoo Mail for iPad

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