From personal_submersibles at psubs.org Wed Mar 1 12:19:41 2023 From: personal_submersibles at psubs.org (James Frankland via Personal_Submersibles) Date: Wed, 1 Mar 2023 17:19:41 +0000 Subject: [PSUBS-MAILIST] Weld seam location Message-ID: Hi All Im not sure if this matters much, but my fabricator has asked whether to put the main seam for the weld on either the top, or bottom of the main tube. Obviously this is for when they orientate it for the tower nozzle. On Jodie B i put it at the top. Skadoc's is at the bottom. What do people think? Thanks James -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Wed Mar 1 12:25:54 2023 From: personal_submersibles at psubs.org (Alec Smyth via Personal_Submersibles) Date: Wed, 1 Mar 2023 12:25:54 -0500 Subject: [PSUBS-MAILIST] Weld seam location In-Reply-To: References: Message-ID: It goes on top, assuming you have a CT on top, because that minimizes the length of the welded seam. Best, Alec On Wed, Mar 1, 2023 at 12:20?PM James Frankland via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Hi All > > Im not sure if this matters much, but my fabricator has asked whether to > put the main seam for the weld on either the top, or bottom of the main > tube. > > Obviously this is for when they orientate it for the tower nozzle. > > On Jodie B i put it at the top. > > Skadoc's is at the bottom. > > What do people think? > > Thanks > James > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Wed Mar 1 12:48:08 2023 From: personal_submersibles at psubs.org (Sean T. Stevenson via Personal_Submersibles) Date: Wed, 01 Mar 2023 17:48:08 +0000 Subject: [PSUBS-MAILIST] Weld seam location In-Reply-To: References: Message-ID: This is true if you have a single seam weld. If you are butt welding multiple sections together, you want to stagger the longitudinal welds rotationally at an angle which is not a factor of the number of lobes at theoretical overall instability failure. Sean -------- Original Message -------- On Mar. 1, 2023, 10:25, Alec Smyth via Personal_Submersibles wrote: > It goes on top, assuming you have a CT on top, because that minimizes the length of the welded seam. > > Best, > Alec > > On Wed, Mar 1, 2023 at 12:20?PM James Frankland via Personal_Submersibles wrote: > >> Hi All >> >> Im not sure if this matters much, but my fabricator has asked whether to put the main seam for the weld on either the top, or bottom of the main tube. >> >> Obviously this is for when they orientate it for the tower nozzle. >> >> On Jodie B i put it at the top. >> >> Skadoc's is at the bottom. >> >> What do people think? >> Thanks >> James >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Wed Mar 1 16:06:58 2023 From: personal_submersibles at psubs.org (James Frankland via Personal_Submersibles) Date: Wed, 1 Mar 2023 21:06:58 +0000 Subject: [PSUBS-MAILIST] Weld seam location In-Reply-To: References: Message-ID: Thanks both. Thats what I have told them. Regards James On Wed, 1 Mar 2023 at 17:48, Sean T. Stevenson via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > This is true if you have a single seam weld. If you are butt welding > multiple sections together, you want to stagger the longitudinal welds > rotationally at an angle which is not a factor of the number of lobes at > theoretical overall instability failure. > > Sean > > > > -------- Original Message -------- > On Mar. 1, 2023, 10:25, Alec Smyth via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > > > It goes on top, assuming you have a CT on top, because that minimizes the > length of the welded seam. > > Best, > Alec > > On Wed, Mar 1, 2023 at 12:20?PM James Frankland via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > >> Hi All >> >> Im not sure if this matters much, but my fabricator has asked whether to >> put the main seam for the weld on either the top, or bottom of the main >> tube. >> >> Obviously this is for when they orientate it for the tower nozzle. >> >> On Jodie B i put it at the top. >> >> Skadoc's is at the bottom. >> >> What do people think? >> >> Thanks >> James >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Wed Mar 1 20:07:49 2023 From: personal_submersibles at psubs.org (Rick Patton via Personal_Submersibles) Date: Wed, 1 Mar 2023 15:07:49 -1000 Subject: [PSUBS-MAILIST] Weld seam location In-Reply-To: References: Message-ID: Mine's on top James. On Wed, Mar 1, 2023 at 11:07 AM James Frankland via Personal_Submersibles < personal_submersibles at psubs.org> wrote: > Thanks both. Thats what I have told them. > Regards > James > > > On Wed, 1 Mar 2023 at 17:48, Sean T. Stevenson via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > >> This is true if you have a single seam weld. If you are butt welding >> multiple sections together, you want to stagger the longitudinal welds >> rotationally at an angle which is not a factor of the number of lobes at >> theoretical overall instability failure. >> >> Sean >> >> >> >> -------- Original Message -------- >> On Mar. 1, 2023, 10:25, Alec Smyth via Personal_Submersibles < >> personal_submersibles at psubs.org> wrote: >> >> >> It goes on top, assuming you have a CT on top, because that minimizes the >> length of the welded seam. >> >> Best, >> Alec >> >> On Wed, Mar 1, 2023 at 12:20?PM James Frankland via Personal_Submersibles >> wrote: >> >>> Hi All >>> >>> Im not sure if this matters much, but my fabricator has asked whether to >>> put the main seam for the weld on either the top, or bottom of the main >>> tube. >>> >>> Obviously this is for when they orientate it for the tower nozzle. >>> >>> On Jodie B i put it at the top. >>> >>> Skadoc's is at the bottom. >>> >>> What do people think? >>> >>> Thanks >>> James >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> >> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> >> _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... URL: From personal_submersibles at psubs.org Thu Mar 2 06:00:30 2023 From: personal_submersibles at psubs.org (Antoine Delafargue via Personal_Submersibles) Date: Thu, 2 Mar 2023 12:00:30 +0100 Subject: [PSUBS-MAILIST] Weld seam location In-Reply-To: References: Message-ID: Hello Mine is on 20degrees off bottom, far from any through hull. Or lifting eyes. And not bathing in bilge water. Looking at pressure vessels rules like uk /eu 13445 you can either put through hulls right through butt welds or far enough. Regards Antoine Le jeu. 2 mars 2023 ? 02:08, Rick Patton via Personal_Submersibles < personal_submersibles at psubs.org> a ?crit : > Mine's on top James. > > On Wed, Mar 1, 2023 at 11:07 AM James Frankland via Personal_Submersibles < > personal_submersibles at psubs.org> wrote: > >> Thanks both. Thats what I have told them. >> Regards >> James >> >> >> On Wed, 1 Mar 2023 at 17:48, Sean T. Stevenson via Personal_Submersibles < >> personal_submersibles at psubs.org> wrote: >> >>> This is true if you have a single seam weld. If you are butt welding >>> multiple sections together, you want to stagger the longitudinal welds >>> rotationally at an angle which is not a factor of the number of lobes at >>> theoretical overall instability failure. >>> >>> Sean >>> >>> >>> >>> -------- Original Message -------- >>> On Mar. 1, 2023, 10:25, Alec Smyth via Personal_Submersibles < >>> personal_submersibles at psubs.org> wrote: >>> >>> >>> It goes on top, assuming you have a CT on top, because that minimizes >>> the length of the welded seam. >>> >>> Best, >>> Alec >>> >>> On Wed, Mar 1, 2023 at 12:20?PM James Frankland via >>> Personal_Submersibles wrote: >>> >>>> Hi All >>>> >>>> Im not sure if this matters much, but my fabricator has asked whether >>>> to put the main seam for the weld on either the top, or bottom of the main >>>> tube. >>>> >>>> Obviously this is for when they orientate it for the tower nozzle. >>>> >>>> On Jodie B i put it at the top. >>>> >>>> Skadoc's is at the bottom. >>>> >>>> What do people think? >>>> >>>> Thanks >>>> James >>>> _______________________________________________ >>>> Personal_Submersibles mailing list >>>> Personal_Submersibles at psubs.org >>>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>>> >>> _______________________________________________ >>> Personal_Submersibles mailing list >>> Personal_Submersibles at psubs.org >>> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >>> >>> _______________________________________________ >> Personal_Submersibles mailing list >> Personal_Submersibles at psubs.org >> http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles >> > _______________________________________________ > Personal_Submersibles mailing list > Personal_Submersibles at psubs.org > http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles > -------------- next part -------------- An HTML attachment was scrubbed... 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