Alan,
Viewports was plural.
One 825mm diameter x 90 degrees x 2” thick was USD $12,500
rated 400 ft.
From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of Alan James
Sent: Sunday, 10 January 2010 1:17 p.m.
To: personal_submersibles@psubs.org
Subject: Re: [PSUBS-MAILIST] Eurosub in the Americas
$40,000
USD a view port "yikes"
could
they vaccum form those viewports into a mold?
I
was talking to a guy at California plastics who said they
do
a large submarine viewport that way for a customer who
comes
in & watches the process.
Can
you get certification with this process?
Hows
the Comsub going, has it got wet yet?
-----
Original Message -----
Sent: Sunday, January 10,
2010 10:31 AM
Subject: RE: [PSUBS-MAILIST]
Eurosub in the Americas
Hi Paul,
I started off looking at exotic steels and wanting to use high
tensiles etc but it comes to availability and price. My rather off-hand
comment on any sub made from 516 / 70 will be OK was I guess a bit flippant but
when you try and find formed heads or other parts of the sub which you want to
weld in then you need to match the steels. 516/70 is easy to find in Nth
America. Carsten is in Europe which has its own supply
idiosyncrasies. As Jon says do the calcs on what you can readily get and
what depth you want to get to. Charpy is generally for cold
pressures. -30 or -40 are normally achieved tests. While you may
get that with windchill in the air, the water will never get there and
the sub will only get to water temperature. To design for lightness the reinforcing
rings are best matched in tensile for the shell properties otherwise you have
to go bigger. It is the reinforcing plates that become an issue for
higher spec unobtainium. You can get deeper with higher specs but then as
you have probably seen Carsten now wants bigger windows which mean thicker and
more cost. I would almost start with the size of window you want and look
at the thickness and cost and then determine what depth you want. For the
visibility I wanted the cost of viewports from Stanley was over $40,000 USD.
Now that sat me down and made me question what the hell I wanted. Hope
that helps. Hugh
From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of lassen@rosebud.ca
Sent: Saturday, 9 January 2010 1:22 p.m.
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Eurosub in the Americas
If I'm not mistaken the yield strength of A516 Gr 70 is 38KSI
whereas S355J2 has a yield strength of 52KSI. This, according to Emile, would
decrease the operating depth. Also, I am curious how the Charpy compares.
Is charpy at all important in sub design?
-------- Original Message
--------
Subject: RE: [PSUBS-MAILIST] Eurosub in the Americas
From: "Hugh Fulton" <hc.fulton@gmail.com>
Date: Fri, January 08, 2010 5:06 pm
To: <personal_submersibles@psubs.org>
Grades and equivalents table:
|
ASME
|
ASTM
|
DIN17155
|
EN10028
|
BS1501
|
|
|
|
|
Name
|
Number
|
|
|
SA 516 60
|
A 516 60
|
HII
|
P265GH
|
1.0425
|
161 430A
|
|
SA 516 65
|
A 516 65
|
17Mn4
|
P295GH
|
1.0481
|
|
|
SA 516 70
|
A 516 70
|
|
P355GH
|
|
224-490 A & B
|
Any sub made from 516 Gr70 will be OK
From: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] On
Behalf Of Emile van Essen
Sent: Saturday, 9 January 2010 12:09 p.m.
To: personal_submersibles@psubs.org
Subject: RE: [PSUBS-MAILIST] Eurosub in the Americas
There will probably be tables to compare the steel.
The 355 stands for the yield strength in N/mm2 (Ultimate
tensile strength 520 N/mm) It is very common steel ; exotic material will
make the sub more expensive and probably more difficult to weld.
Lower or higher yield strength decrease or increase the dive depth.
Pipes are even here in Inch sizes! The other problem is that you
need just very short pieces and you have to buy lengths. Go with rolled plate!.
Van: owner-personal_submersibles@psubs.org [mailto:owner-personal_submersibles@psubs.org] Namens
lassen@rosebud.ca
Verzonden: vrijdag 8 januari 2010 23:02
Aan: personal_submersibles@psubs.org
Onderwerp: [PSUBS-MAILIST] Eurosub in the Americas
I am trying to evaluate the prospect of building the new Eurosub
here in Canada. Does anyone know if an ASME or ASTM equivalent exists for the
steel that this sub is made of? It is S355J2, a German standard if I'm not
mistaken. How might I account for any differences in thickness, overall pipe /
end cap diameter and steel engineering properties if I hope to build this sub
which uses metric pipe sizes and a steel standard that I don't
believe is available here either.
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