[PSUBS-MAILIST] Heads Question

Sun Sep 17 21:52:16 EDT 2017

Definitely want to bevle both sides. If you don't, your wire/stick/Tig will
short out way too soon becoming molten and not reaching the ID of the hull
and you will have to do a lot of back gouging before reaching your first
pass.
Rick

On Sun, Sep 17, 2017 at 3:54 PM Brian Cox via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> I have found that I get a better weld if both sides are beveled .
>
> Brian
>
> --- personal_submersibles at psubs.org wrote:
>
> From: Private via Personal_Submersibles <personal_submersibles at psubs.org>
>
> To: Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> Subject: Re: [PSUBS-MAILIST] Heads Question
> Date: Sat, 16 Sep 2017 19:30:01 -0400
>
> Hi David,
>
> Absolutely, you want it with the flange. Any impression otherwise was my
> "mind typo" that I was trying to clarify in the second email. If you can
> avoid beveling it yourself, however, it'll save quite a job. You only need
> one of the two edges beveled, either the head flange or the end of the
> cylinder it will mate to, and it doesn't matter which. Greg has a good
> point, but I suppose a key factor is whether you'll be welding yourself or
> contracting out. I learned to do my own, with an awful lot of help from Dan
> Lance.
>
> Best,
>
> Alec
>
> On Sep 16, 2017, at 12:50 PM, james cottrell via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Hi David,
>
> In my experience it was cheaper and faster to hire an ASME tank fabricator
> to produce a steel cylinder with the head (or heads) welded on. Mine came
> machine welded with an ASME code stamp.
> If your design will feature external frames, ask them for both heads
> welded on. If your design will feature internal frames (done later) ask
> them to weld one end only. This will be cheaper in the long run and better
> built. It's hard to beat pressure vessel code machine welding. Specify NO
> backing strips.
>
> Another tip- call it a "vacuum tank".
>
> Greg Cottrell
>
> ------------------------------
> *From:* David Colombo via Personal_Submersibles <
> personal_submersibles at psubs.org>
> *To:* Personal Submersibles General Discussion <
> personal_submersibles at psubs.org>
> *Sent:* Saturday, September 16, 2017 12:20 PM
> *Subject:* Re: [PSUBS-MAILIST] Heads Question
>
> Hi Alec,
> I just spoke with the company that Roberto mentioned here in California to
> place an order for dished head for the SeaQuestor. I will be using the
> 36"OD x .375 A516-70 steel what they call Elliptical 2:1 Ratio ASME Code
> Type. It comes with a 2" flange which is really a 36" od ring shape as part
> of the forming. This would mate up to the 36"OD first hull section. I'm
> thinking that this would give me the best welding condition with two
> matched surfaces that I would bevel for full pen welding. I'm curious why
> not to have the flange?   My cost here is $480.00 + $96 to have it shipped
> to northern California from southern California. even though its only a
> nine hour drive one way, I think my time would be worth more than $5 hr to
> pick it up. LOL Unless of course its cheaper in Canada (Hank), I might make
> the trip and could serve as support crew for the Gamma. Any thoughts out
> there from fellow Psubers would be appreciated.
>
> Best Regards,
> David Colombo
>
> 804 College Ave
> <https://maps.google.com/?q=804+College+Ave+Santa+Rosa,+CA.+95404+(707&entry=gmail&source=g>
> Santa Rosa, CA. 95404
> <https://maps.google.com/?q=804+College+Ave+Santa+Rosa,+CA.+95404+(707&entry=gmail&source=g>
> (707
> <https://maps.google.com/?q=804+College+Ave+Santa+Rosa,+CA.+95404+(707&entry=gmail&source=g>)
> 536-1424
> www.SeaQuestor.com <http://www.seaquestor.com/>
>
>
> On Fri, Sep 15, 2017 at 2:28 PM, Alec Smyth via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Ugh, mental typo. I meant "un-beveled" and "bevel them yourself", not
> "un-flanged" and "flange them yourself".
>
> !!!!!!!
>
> On Fri, Sep 15, 2017 at 5:25 PM, Alec Smyth <alecsmyth at gmail.com> wrote:
>
> Hi Roberto,
>
> I believe the short description for what you need is flanged, beveled, and
> code. You could get them unflanged, but it takes quite a while to make a
> flange with an angle grinder. The flanges if I recall are 2". Do set up a
> project page or something so we can follow progress!
>
>
> Best,
>
> Alec
>
> On Fri, Sep 15, 2017 at 5:07 PM, roberto alvarez via Personal_Submersibles
> <personal_submersibles at psubs.o rg <personal_submersibles at psubs.org>>
> wrote:
>
> Hi, lost the plans cd for the k250, i am  interested in the  head
> selection, i found a seler in california and have
> flanged ,beveled ,code, non code,
>
> Will apreciate your support in this ( until i found the plans cd )
>
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