Re: pressure hull design (Fwd)

["Alan D. Secor" <secor@btv.ibm.com>]

Bill,

Just curious where you came across the pipeline pipe and how expensive it
was.  Also, I'm a bit confused about your description of the ends....
If I understand right, what you describe would be a "half" cylinder on
the ends.  If this is right, the what seals the ends of the "half" 
cylinder?
Flat metal??  I can't picture hoe you would essentially attach a rectangle
to a circle.  Maybe I'm picturing it wrong or misunderstood your 
description.
At any rate, I would expect hemispherical ends ala a propane cylinder 
would
be optimal.

Regards.......Al
 
>At 04:48 PM 98/09/16 -0700, you wrote:
>>	Hi Marsee,
>>
>>	My point in suggesting that someone who did not know where to
>>find/derive such a formula probably needs a little more than a formula in
>>a book to be safe. 
>
>hokay.,.. lets just throw this out.. I am the person who probably needs a
>little more than the formula , but, I have a 5/8 thick hull, 8 feet long,
>with rounded ends on it. also 5/8 thick.. (rounded as in cut a 4ft piece of
>pipe in half, and weld the pieces on the end) I am gonna dive it to 250
>feet max.. probably much less most of the time.. (150 or less).. My little
>brain figures that this pipe (new pipeline pipe) will hold in excess of
>2500 lbs/sq/in inside trying to get out,  it is certain to hold less than
>200lbs/sq/in from the outside..
>
>
>
>Ok.. I have braced myself.. let the comments fly..............
>
>bill
>

--
Alan D. Secor
e-mail: secor@btv.ibm.com