[PSUBS-MAILIST] pressure test

Wed Oct 23 12:31:42 EDT 2013

That Navy chamber is unbelievable!  Maybe we could all club together and
stick all our psubs in at the same time!

On 23 October 2013 17:16, <MerlinSub at t-online.de> wrote:

> **
> Look for a company which impregnate wood under pressure.
> The pressure boiler have the right size and the pressure is good for
> around 300 feet.
> Normaly they are relative unexpensive - around 500 USD. Some of them are
> good for 500 feet.
> We did it here in the past and today - works. But all meassuring and
> sensors up to yourself.
> Nothing you can use official.
>
> http://www.petermueller.be/joinery-impregnation/impregnation/#
> http://cdn.agrarverlag.at/to/mmedia/image//2013.04.22/1366647313692_1.jpg
> http://en.wikipedia.org/wiki/File:Industrial_Autoclaves.jpg
>
> Or looking around for *industrial autoclaves.
> *Glas companies have them in that size to make saftey glases
> And Aircraft companies working with grp/crp technic.
>
>
> http://upload.wikimedia.org/wikipedia/commons/8/81/Autoclave_Laminacion_de_Vidrio.jpg
>
> Or buy you own, make the test and sale it again with a big win.. ;-)
> http://www.thermalequipment.com/used-inv2.html
>
> A profesional chamber for dive equipment in Scotland
> ask f or a simple pressure test witth not so much sensors around 9 K USD.
> And  there are 3000 feet are no problem.
>
> I ask our navy for there Submarine pressure dock some 20 years ago
> Answer was 70.000 USD for the test and additional the same amount for the
> dock insurance company..
>
> http://file1.npage.de/006622/23/bilder/715_dockc_04.jpg
> http://file1.npage.de/006622/23/bilder/715_dockc_02.jpg
> http://file1.npage.de/006622/23/bilder/715_dockc_03.jpg
> http://file1.npage.de/006622/23/bilder/715_dockc_01.jpg
>
> vbr Carsten
>
>
> <JimToddPsub at aol.com> schrieb:
>
> Joe,
> The cost of pressure testing has as much to do with multi-point measuring
> and analysis of distortion as it does with just seeing if the vessel can
> survive a given depth intact.  There is a depth [above crush depth] at
> which the vessel undergoes enough stress that one cycle or repeated cycles
> can compromise the vessel even though it might not appear to have
> suffered.  Vance and others can speak a lot more to that than I can.
> Jim
>
>  In a message dated 10/23/2013 8:46:44 A.M. Central Daylight Time,
> josephperkel at yahoo.com writes:
>
>   Wow that's a bit rough for a working man! So much for that.
>
> I must say though, that I don't like much the lower the sub to the bottom
> and hope it comes back method of deep testing.
>
> Joe
>
> Sent from Yahoo! Mail for iPad
>
>  ------------------------------
> *From: *Alec Smyth <alecsmyth at gmail.com>;
> *To: *Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>;
> *Subject: *Re: [PSUBS-MAILIST] pressure test
> *Sent: *Wed, Oct 23, 2013 12:52:33 PM
>
>   Hi Hank,
>
> I asked at Carderock over a decade ago and was told the cost would depend
> on setup time, which varies depending on how much instrumentation you want
> during the test, but that a typical figure was around $27K. Waaaay beyond
> my budget. Dale Heinzing tested Snoopy somewhere on the West side of Canada
> at a lumber yard. Snoopy went in the tank alongside the lumber and must
> have been pretty well disinfected, but the scary bit was that they released
> the pressure almost instantaneously, with a bang. That test was  to only
> 400' so not really sufficient for a Nekton, but it might still be of
> interest since I think it's relatively close to you and probably was
> inexpensive.
>
>
> Best,
>
> Alec
>
>
> On Wed, Oct 23, 2013 at 8:33 AM, Joe Perkel <josephperkel at yahoo.com>wrote:
>
>>  Hank,
>>
>> There are two in the states however, the one on the west coast has a 72"
>> limit if I recall correctly.
>> The other on the east coast, is the same one used for the k-600 and Alvin.
>>
>> A contract and waiver are required, let us know the cost if you do it.
>> Go to the WHOI website for info
>>
>>
>> Joe
>>
>>   *From:* hank pronk <hanker_20032000 at yahoo.ca>
>>
>> *To:* Personal Submersibles General Discussion <
>> personal_submersibles at psubs.org>
>> *Sent:* Wednesday, October 23, 2013 8:10 AM
>> *Subject:* Re: [PSUBS-MAILIST] pressure test
>>
>>   Does anyone know if the is a pressure chamber large enough to test  my
>> Nekton submarine in the Pacific North West.
>> Hank
>>
>>   *From:* Phil Nuytten <phil at philnuytten.com>
>> *To:* Personal Submersibles General Discussion <
>> personal_submersibles at psubs.org>
>> *Sent:* Tuesday, October 15, 2013 10:19:38 PM
>> *Subject:* Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull
>>
>>   Hi, Hugh
>> As Vance says, HY80 is somewhat challenging to weld err, actually, that s
>> an understatement. We had to work with our fabricators to come up with a
>> whole weld procedure to satisfy our classing agency. If you decide to go
>> this route, let me know and we will share that procedure.
>> Phil
>>
>>  *From:* vbra676539 at aol.com
>> *Sent:* Tuesday, October 22, 2013 7:18 PM
>> *To:* personal_submersibles at psubs.org
>> *Subject:* Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull
>>
>>  I think it is somewhat demanding to weld, and expensive by comparison,
>> of course. That said, there is a mountain of data available, as the
>> pressure hulls of most modern US Navy submarines are built out of it.
>> Vance
>>  -----Original Message-----
>> From: Hugh Fulton <hc.fulton at gmail.com>
>> To: 'Personal Submersibles General Discussion' <
>> personal_submersibles at psubs.org>
>> Sent: Tue, Oct 22, 2013 10:15 pm
>> Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull
>>
>>   Vance,  Yep that sounds about right.
>> Are there any nasties to using it?
>> Chs Hugh
>>
>>
>>
>>  *From:* Personal_Submersibles [
>> mailto:personal_submersibles-bounces at psubs.org?] *On Behalf Of *Vance
>> Bradley
>> *Sent:* Wednesday, 23 October 2013 1:37 p.m.
>> *To:* Personal Submersibles General Discussion
>> *Subject:* Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull
>>
>>  Hugh,
>>  HY-80 used to maintain the standard dimensions of a DW2000 with 50%
>> depth increase.
>>  Vance
>>
>> Sent from my iPhone
>>
>> On Oct 22, 2013, at 8:13 PM, "Hugh Fulton" <hc.fulton at gmail.com> wrote:
>>
>>  Vance,  I am sure I saw recently from Phil that he was using HY 80 but
>> I don t know what on.  I did a calc on mine and I got a lot deeper using
>> the HY 80 specs over the Grade 70.
>> Hugh
>>
>>  *From:* Personal_Submersibles [
>> mailto:personal_submersibles-bounces at psubs.org] *On Behalf Of *
>> vbra676539 at aol.com
>> *Sent:* Wednesday, 23 October 2013 11:55 a.m.
>> *To:* personal_submersibles at psubs.org
>> *Subject:* Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull
>>
>>  One other thing comes to mind on this. Phil uses A516Gr70 in the
>> DW2000s. It occurs to me that if there was a demonstrable benefit to A537,
>> he would have used taken advantage of it. And he didn't, apparently.
>> Interesting. Don't know why, though. Maybe it has something to do with
>> welding stainless inserts in and the heat treatment thereof. Just a guess.
>>  Vance
>>  -----Original Message-----
>> From: JimToddPsub <JimToddPsub at aol.com>
>> To: personal_submersibles <personal_submersibles at psubs.org>
>> Sent: Tue, Oct 22, 2013 6:42 pm
>> Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull
>>   Vance,
>>  From Leeco Steel's website:
>>
>>  A537 plate steel is heat-treated. As a result, it displays greater
>> yield and tensile strength than the more standard A516 grades. *A537
>> steel plate* is ideal for both in boilers and pressure vessels, and is
>> used in the oil, gas and petrochemical industry.
>>
>>  Nice to see it provides at least a brief comparison to A516.  I'm sure
>> there are more variables to consider including cost.
>>
>>  Jim
>>
>>  In a message dated 10/22/2013 5:23:43 P.M. Central Daylight Time,
>> vbra676539 at aol.com writes:
>>
>>  Jim,
>>  A537 was used extensively, as well, especially in the early boats that
>> Perry built. Maybe you can figure it out. It seems that I recall being told
>> that it was somewhat harder to weld but had better
>> cold-water-under-pressure properties. Maybe Dr. Nuytten would weigh in on
>> this, assuming he isn't up to his ass in DW3000 alligators this week (which
>> I suspect he is).
>>  Vance
>>  -----Original Message-----
>> From: JimToddPsub <JimToddPsub at aol.com>
>> To: personal_submersibles <personal_submersibles at psubs.org>
>> Sent: Tue, Oct 22, 2013 4:18 pm
>> Subject: Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull
>>   Greg,
>>  I should have clarified that.  It was a cut-and-paste from a web site.
>> I'm more of a librarian in that I save info in an organized fashion when I
>> come across it so I'll have it available later when the need arises.  That
>> was the case in this instance.
>>  Jim
>>
>>  In a message dated 10/22/2013 1:25:34 P.M. Central Daylight Time,
>> jgcottrell2002 at yahoo.com writes:
>>
>>  Thanks for the info, Jim. It's good to know there is some one in the
>> group that is also in the steel industry.
>>
>>  Greg
>>
>>   *From:* "JimToddPsub at aol.com" <JimToddPsub at aol.com>
>> *To:* personal_submersibles at psubs.org
>> *Sent:* Tuesday, October 22, 2013 12:59 PM
>> *Subject:* Re: [PSUBS-MAILIST] Best Steel to use for Sub Hull
>>
>>   Maybe more detail than you really want to know, but here goes:
>>
>>  ASTM A 516 or ASME SA 516 grade is one of the most popular steel grades
>> in market .
>>
>> It is primarily intended for use in welded pressure vessels where notch
>> toughness is important. It comes in four grades 55, 60, 65 & 70. At Oakley
>> Steel we mainly sell 516 gr 60 and 516 gr 70. These grades cover a range of
>> tensile strengths from 55 - 90 MPa and this versatility explains much of
>> the specifications popularity.
>>
>> For plates thinner than 40mm we normally supply them as rolled. Plates
>> supplied above 40mm thick are normalised.
>>
>> For A 516 grade 70, which is one of our most popular steels, the ASME
>> standard composition is as follows (dependent on grade):
>>
>> Carbon 0.27 - 0.31%
>> Manganese 0.79 - 1.3%
>> Phosphorous 0.035% max
>> Sulphur 0.035% max
>> Silicon 0.13 - 0.45%
>>
>>  In a message dated 10/22/2013 11:53:12 A.M. Central Daylight Time,
>> jonw at psubs.org writes:
>>
>>
>> Generally, A516gr70 suffices for personal or recreational submarines.
>>
>> Jon
>>
>>
>> On 10/22/2013 12:45 PM, Christopher Cave wrote:
>>
>>   Hello,
>>
>>  What is the best steel to use for a submarine hull. Someone mentioned
>> marine steel such as 316,316L or 317. Any suggestions or a website I can
>> review.
>>
>>  Thanks,
>>  Chris
>>
>>  *Christopher Cave
>> *
>> *christophercave at yahoo.com*
>>
>>
>>
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> 18211 Admannshagen
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