<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><DIV>Hank, </DIV><DIV> I think I'm going to opt for a 2" gate valve instead of the 2" ball I was going to use ( for my main ballast). The 2" ball valve is not very easy to turn and I don't want to be dealing with a problem like that underwater.</DIV><DIV> </DIV><DIV>Brian<BR><BR>--- personal_submersibles@psubs.org wrote:<BR><BR>From: hank pronk via Personal_Submersibles <personal_submersibles@psubs.org><BR>To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><BR>Subject: Re: [PSUBS-MAILIST] Hp valves<BR>Date: Sat, 23 Jan 2016 02:09:16 +0000 (UTC)<BR><BR></DIV><DIV style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px; background-color: rgb(255, 255, 255);"><DIV><SPAN>Brian,</SPAN></DIV><DIV><SPAN>It is nice to hear you ask about this stuff, that means your at the next stage.</SPAN></DIV><DIV><SPAN>Hank</SPAN></DIV><DIV><SPAN><BR></SPAN></DIV><DIV><SPAN><BR></SPAN></DIV><DIV><SPAN><BR></SPAN></DIV> <DIV><BR><BR></DIV><DIV style="display: block;"> <DIV style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 12px;"> <DIV style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <DIV dir="ltr"><FONT face="Arial" size="2"> On Friday, January 22, 2016 6:41 PM, Brian Cox via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<BR></FONT></DIV> <BR><BR> <DIV><DIV><DIV><DIV style="font-family: Arial, sans-serif; font-size: 10pt;"><DIV>Alan, Are the Kittridge subs all redundant in that respect? </DIV><DIV> </DIV><DIV>Brian<BR><BR>--- personal_submersibles@psubs.org wrote:<BR><BR>From: Alan James via Personal_Submersibles <personal_submersibles@psubs.org><BR>To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><BR>Subject: Re: [PSUBS-MAILIST] Hp valves<BR>Date: Fri, 22 Jan 2016 22:57:07 +0000 (UTC)<BR><BR></DIV><DIV><DIV style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);"><DIV><SPAN>Brian,</SPAN></DIV><DIV><SPAN>just looked up the G.L. rules Section 9 piping systems, pumps & compressors.</SPAN></DIV><DIV><SPAN>It says 1.2 Pipes which are led thriught the pressure hull are to be fitted with 2 shut off valves.</SPAN></DIV><DIV><SPAN>One of which is to be fitted immediately at the hull wall.</SPAN></DIV><DIV><SPAN> In 3.3 it says " The compressed air supply is to be carried in at least 2 separate banks of receivers with the</SPAN></DIV><DIV><SPAN>same total volume."</SPAN></DIV><DIV><SPAN>Alan</SPAN></DIV><BR> <DIV><BR><BR></DIV><DIV style="display: block;"> <DIV style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <DIV style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <DIV dir="ltr"> <FONT face="Arial" size="2"> </FONT><HR size="1"> <B><SPAN style="font-weight: bold;">From:</SPAN></B> Alan James via Personal_Submersibles <personal_submersibles@psubs.org><BR> <B><SPAN style="font-weight: bold;">To:</SPAN></B> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <BR> <B><SPAN style="font-weight: bold;">Sent:</SPAN></B> Saturday, January 23, 2016 11:31 AM<BR> <B><SPAN style="font-weight: bold;">Subject:</SPAN></B> Re: [PSUBS-MAILIST] Hp valves<BR> </DIV> <DIV><BR><DIV><DIV><DIV style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);"><DIV><SPAN>Brian,</SPAN></DIV><DIV dir="ltr"><SPAN>can you split the HP air in to two lines so you have two HP lines coming in.</SPAN></DIV><DIV dir="ltr"><SPAN>That way if one line failed you would have a back up. Also if a HP line ruptured</SPAN></DIV><DIV dir="ltr"><SPAN>or connection broke, then you would only have half the pressure in the hull.</SPAN></DIV><DIV dir="ltr"><SPAN>Inside my ambient I never see HP air, but I have two separate air systems</SPAN></DIV><DIV dir="ltr"><SPAN>& valves to use both simultaneously or separately.</SPAN></DIV><DIV dir="ltr"><SPAN>I am not sure what other psubbers do. This is bound to be covered in the Busby book.</SPAN></DIV><DIV dir="ltr"><SPAN> I have heard reference to subs being stuck in the mud through sitting on the bottom</SPAN></DIV><DIV dir="ltr"><SPAN>& coming up carrying a load of extra weight in the form of mud. I noticed in Carsten's</SPAN></DIV><DIV dir="ltr"><SPAN>video that he sat on the bottom & pivoted. I am guessing to let the divers out, but</SPAN></DIV><DIV dir="ltr"><SPAN>sounds like a good practice on a muddy sea bed.</SPAN></DIV><DIV dir="ltr"><SPAN>Alan</SPAN></DIV><BR> <DIV><BR><BR></DIV><DIV style="display: block;"> <DIV style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <DIV style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <DIV><DIV dir="ltr"> <FONT face="Arial" size="2"> </FONT><HR size="1"> <B><SPAN style="font-weight: bold;">From:</SPAN></B> Brian Cox via Personal_Submersibles <personal_submersibles@psubs.org><BR> <B><SPAN style="font-weight: bold;">To:</SPAN></B> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <BR> <B><SPAN style="font-weight: bold;">Sent:</SPAN></B> Saturday, January 23, 2016 10:23 AM<BR> <B><SPAN style="font-weight: bold;">Subject:</SPAN></B> Re: [PSUBS-MAILIST] Hp valves<BR> </DIV> <DIV><BR><DIV><DIV><DIV style="font-family: Arial, sans-serif; font-size: 10pt;"><DIV>Alan, The air would most likely vent thru the hatch and then I'd be at whatever pressure the ambient water pressure would be . If there was no air to surface I guess I'd have to bail. I will have an additional tank outside the hull for filling the ballast however. That will be for raising and lowering the sub with scuba while out side the sub. I was thinking it would be kind of neat to set it on the bottom in about 30' water. That way I wouldn't have to anchor it !</DIV><DIV> </DIV><DIV>Brian<BR><BR>--- personal_submersibles@psubs.org wrote:<BR><BR>From: Alan James via Personal_Submersibles <personal_submersibles@psubs.org><BR>To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><BR>Subject: Re: [PSUBS-MAILIST] Hp valves<BR>Date: Fri, 22 Jan 2016 17:51:26 +0000 (UTC)<BR><BR></DIV><DIV><DIV style="color: rgb(0, 0, 0); font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px; background-color: rgb(255, 255, 255);"><DIV><SPAN>Hi Brian,</SPAN></DIV><DIV><SPAN>I questioned G.L. on a number of items in thier rules for submarines</SPAN></DIV><DIV dir="ltr"><SPAN>& there are some grey areas that you would have to argue the point over</SPAN></DIV><DIV dir="ltr"><SPAN>with an inspector.</SPAN></DIV><DIV dir="ltr"><SPAN>One general rule is that no one failure can cause a major event.</SPAN></DIV><DIV dir="ltr"><SPAN>If the pipe failed at that elbow & you couldn't stop the flow of HP air,</SPAN></DIV><DIV dir="ltr"><SPAN>what sort of pressure could you be left with in the hull?</SPAN></DIV><DIV dir="ltr"><SPAN>Would you be able to blow the ballast tanks if you lost your air</SPAN></DIV><DIV dir="ltr"><SPAN>from that failure or do you have a redundant air supply?</SPAN></DIV><DIV dir="ltr"><SPAN>Cheers Alan</SPAN></DIV><DIV dir="ltr"><SPAN><BR></SPAN></DIV><DIV dir="ltr"><SPAN><BR></SPAN></DIV><BR> <DIV><BR><BR></DIV><DIV style="display: block;"> <DIV style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <DIV style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <DIV dir="ltr"> <FONT face="Arial" size="2"> </FONT><HR size="1"> <B><SPAN style="font-weight: bold;">From:</SPAN></B> Brian Cox via Personal_Submersibles <personal_submersibles@psubs.org><BR> <B><SPAN style="font-weight: bold;">To:</SPAN></B> Personal Submersibles General Discussion <personal_submersibles@psubs.org> <BR> <B><SPAN style="font-weight: bold;">Sent:</SPAN></B> Saturday, January 23, 2016 6:34 AM<BR> <B><SPAN style="font-weight: bold;">Subject:</SPAN></B> Re: [PSUBS-MAILIST] Hp valves<BR> </DIV> <DIV><BR><DIV><DIV><DIV style="font-family: Arial, sans-serif; font-size: 10pt;"><DIV>ABS says " as close as possible" I guess I'm ok with a short nipple coming off a elbow.</DIV><DIV> </DIV><DIV>Brian<BR><BR>--- personal_submersibles@psubs.org wrote:<BR><BR>From: Brian Cox via Personal_Submersibles <personal_submersibles@psubs.org><BR>To: "PSubs " <personal_submersibles@psubs.org><BR>Subject: [PSUBS-MAILIST] Hp valves<BR>Date: Wed, 20 Jan 2016 08:34:43 -0800<BR><BR></DIV><DIV><DIV style="font-family: Arial, sans-serif; font-size: 10pt;"><DIV>Is there any distinction as to how close a HP shut off valve or check valve has to be to the hull penetration so as to meet ABS requirements? Can there be a short nipple between an elbow and the valve for instance?</DIV><DIV> </DIV><DIV>Brian Cox</DIV></DIV></DIV>
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