[Date Prev][Date Next]
[Chronological]
[Thread]
[Top]
Re: [PSUBS-MAILIST] end caps [was: what is the diference k250- k600]
"avoid having any welds in the weakest/most stressed area" A properly made
weld on high pressure pipe or a pressure vessel will always beat the pipe,
that is the weld and the heat affected zone will be stronger than the parent
material. JTMcC.
----- Original Message -----
From: "Ian Roxborough" <irox@ix.netcom.com>
To: <personal_submersibles@psubs.org>
Sent: Tuesday, May 14, 2002 6:15 PM
Subject: Re: [PSUBS-MAILIST] end caps [was: what is the diference k250-
k600]
> On Mon, 13 May 2002 23:13:56 +0200
> MerlinSub@t-online.de (Carsten Standfuß) wrote:
>
> > Means the stern endcap of CSSX want to go forward with a pressure
> > of 1568 tons - and the forward endcap want to meet the stern endcap with
> > the same force. I am just between them :-) . Also the connection between
> > the endcaps and the cylinder has to be checked carefully - one reason
> > that the standard endcaps comes with a short cylinder part - is to get
> > the
> > connecting welding out of this area.. all this force turns from the big
> > curve of the encdcap to the hard curve - and than to the cylinder.
> > The point between the big curve and the hard curve is the weak point.
>
> Very interesting, I've been thinking about using two end caps
> welded together as a two person pressure hull. The end caps
> I had in mind was a six foot diameter 2:1 elliptical end cap
> made of 12.5mm thick steel.
>
> This doesn't seem like a good idea after reading that, since
> it's not easy to have the entry/exit hatch clear of the
> waterline and avoid having any welds in the weakest/most stressed
> area (where the big curve meets the little curve)...
>
> I posted a schematic of the two end cap sub on subfiles,
> look for "fish shaped submarine" at:
> http://www.prismnet.com/~moki/subfiles.html
>
> Thanks for the information,
>
> Ian.
>
>