Re: [PSUBS-MAILIST] Bill Gifford's Project

[Warren Greenway <opensourcesub@yahoo.com>]

Normally the weld seams are oriented opposite of each-
other, or at least staggered. This is a general rule
of
welding, and applies to most anything welded. 

Warren.

--- Steven Mills <barycenter@earthlink.net> wrote:
> >From: Warren Greenway <opensourcesub@yahoo.com>
> >
> > They are rolled and welded (so, yes, they do have
> a
> > seam.) The ends are then welded onto the tube.
> This
> > is standard practice, and while there may be
> variation
> > you can bank on them being built this way.
> > 
> > Warren.
> 
> Thanks.
> 
> Bill uses 2 tanks with the same ASME rating, but it
> is a single
> pressure hull. [ see quote/specs below ]
> 
> If a double hull were to be designed, would you have
> the inner hull
> at a stronger and thicker spec than the outer hull?
> [ using 2 propane
> tanks ]
> 
> Also, this might seem an oddball question or
> inconsequential, but
> should the weld seams on both hulls be parallel and
> lined up with
> each other?
> 
> --Steve
> 
> ....quoted fromBill Gifford's website....
>
http://www.giffordmarineinc.com/sub/little_gato5_9_01.htm
> 
> "I have chosen to use two new propane tanks to form
> the pressure hull.
> Each tank is made of A-516 grade 70-pressure vessel
> steel, .270 inch's
> thick. Both tanks were pressure tested to 325
> pounds. They have a working
> pressure of 250 pounds and are ASME rated with a
> spec. Plate on each
> tank. I am installing three by one half-inch
> reinforcement rings every two-foot
> on center. Plus additional deck and bulkhead
> framing. The one-tank easures
> 17.6 ft. long and the other is 9 ft. I have cut a
> hole in the top of the larger tank,
> around that I intend to install the conning tower,
> which is made up of parts
> of the smaller tank and additional plate. I have cut
> the ends from the smaller
> tank and have connected them on each end of the
> larger tank for hard
> ballast. I have purchased a eighteen-foot by two
> foot by quarter inch pipe
> for the soft ballast tanks. The pipe was split log
> ways and will be attached
> to each side, to form the side tanks. The sub will
> have a displacement of
> approx. 18,000 lbs. "
> 
> > 
> > --- Steven Mills <barycenter@earthlink.net> wrote:
> > > I haven't examined a propane tank closely, but
> are
> > > they filament
> > > wound and rolled or are the ends welded to the
> tube?
> > > Is the tube
> > > seamless or also rolled and welded? Are they all
> > > manufactured
> > > the same way?
> > > 
> > > 
> > > --Steve
> > > 
> > > 
> > > ----- Original Message ----- 
> > > From: Coalbunny <coalbunny@vcn.com>
> > > 
> > > 
> > > > Yes, it is!  What about the innerds?  Can we
> get a
> > > spec sheet and
> > > > drawings if we want to make something similar?
> > > > Carl
> > > > 
> > > > 
> > > > Steven Mills wrote:
> > > > > 
> > > > > Wow, that's quite impressive !
> > > > > 
> > > > > It's a beautiful boat.
> > > > > 
> > > > > --Steve
> > > > > 
> > > > > ----- Original Message -----
> > > > > From: Jeremy Crawford <ISMASC@hotmail.com>
> > > > > >
> > > > > 
> > > > > > If anyone hasn't checked out Bill's Sub
> lately
> > >  you should, the exterior is
> > > > > > done and it looks awesome.  Kudos Bill,
> you
> > > have done a fantastic job!
> > > > > >
> > > > > > Best Regards,
> > > > > > Jeremy
> > > > > >
> > > > > >
> > >
> >
>
http://www.giffordmarineinc.com/sub/sub_5_16_03/Sub_5_16_03.html
> > > > 
> > > > -- 
> > > > "Indeed, desire is the seed of thought, the
> prime
> > > force that activates
> > > > the mechanism of the mind." -- Kama Sutra
> > > 
> > > 
> > 
> > 
> > __________________________________
> > Do you Yahoo!?
> > The New Yahoo! Search - Faster. Easier. Bingo.
> > http://search.yahoo.com
> 


__________________________________
Do you Yahoo!?
The New Yahoo! Search - Faster. Easier. Bingo.
http://search.yahoo.com