[PSUBS-MAILIST] pressure test

David Colombo seaquestor at gmail.com
Wed Oct 23 23:55:55 EDT 2013 

Hank, what the dimensions of his chamber?
 On Oct 23, 2013 2:01 PM, "hank pronk" <hanker_20032000 at yahoo.ca> wrote:

> Alec,
> I just heard from Dr Newton at Nutco and their  chamber is to small for my
> Nekton sub but the cost is very reasonable at 1,500 to 2,500 dollars
> depending on time.
> Hank
>
>   *From:* Alec Smyth <alecsmyth at gmail.com>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Wednesday, October 23, 2013 6:52:33 AM
> *Subject:* Re: [PSUBS-MAILIST] pressure test
>
>  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?<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<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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