<html><head></head><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:16px"><div><span>Hi Brian,</span></div><div id="yui_3_16_0_1_1453483958434_8150"><span id="yui_3_16_0_1_1453483958434_8149">I questioned G.L. on a number of items in thier rules for submarines</span></div><div dir="ltr" id="yui_3_16_0_1_1453483958434_8152"><span id="yui_3_16_0_1_1453483958434_8151">& there are some grey areas that you would have to argue the point over</span></div><div dir="ltr" id="yui_3_16_0_1_1453483958434_8153"><span>with an inspector.</span></div><div dir="ltr" id="yui_3_16_0_1_1453483958434_8154"><span id="yui_3_16_0_1_1453483958434_8282">One general rule is that no one failure can cause a major event.</span></div><div dir="ltr" id="yui_3_16_0_1_1453483958434_8127"><span id="yui_3_16_0_1_1453483958434_8126">If the pipe failed at that elbow & you couldn't stop the flow of HP air,</span></div><div dir="ltr" id="yui_3_16_0_1_1453483958434_8127"><span id="yui_3_16_0_1_1453483958434_8225">what sort of pressure could you be left with in the hull?</span></div><div dir="ltr" id="yui_3_16_0_1_1453483958434_8127"><span id="yui_3_16_0_1_1453483958434_8226">Would you be able to blow the ballast tanks if you lost your air</span></div><div dir="ltr" id="yui_3_16_0_1_1453483958434_8127"><span id="yui_3_16_0_1_1453483958434_8244">from that failure or do you have a redundant air supply?</span></div><div dir="ltr" id="yui_3_16_0_1_1453483958434_8127"><span>Cheers Alan</span></div><div dir="ltr" id="yui_3_16_0_1_1453483958434_8127"><span><br></span></div><div dir="ltr" id="yui_3_16_0_1_1453483958434_8124"><span><br></span></div><br> <div class="qtdSeparateBR" id="yui_3_16_0_1_1453483958434_8125"><br><br></div><div class="yahoo_quoted" id="yui_3_16_0_1_1453483958434_8158" style="display: block;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1453483958434_8157"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;" id="yui_3_16_0_1_1453483958434_8156"> <div dir="ltr" id="yui_3_16_0_1_1453483958434_8155"> <font size="2" face="Arial" id="yui_3_16_0_1_1453483958434_8159"> <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> </font> </div> <div class="y_msg_container" id="yui_3_16_0_1_1453483958434_8314"><br><div id="yiv5594139608"><div id="yui_3_16_0_1_1453483958434_8313"><div style="font-family:Arial, sans-serif;font-size:10pt;" id="yui_3_16_0_1_1453483958434_8312"><div id="yui_3_16_0_1_1453483958434_8311">ABS says " as close as possible" I guess I'm ok with a short nipple coming off a elbow.</div><div> </div><div id="yui_3_16_0_1_1453483958434_8315">Brian<br clear="none"><br clear="none">--- personal_submersibles@psubs.org wrote:<br clear="none"><br clear="none">From: Brian Cox via Personal_Submersibles <personal_submersibles@psubs.org><br clear="none">To: "PSubs " <personal_submersibles@psubs.org><br clear="none">Subject: [PSUBS-MAILIST] Hp valves<br clear="none">Date: Wed, 20 Jan 2016 08:34:43 -0800<br clear="none"><br clear="none"></div><div class="yiv5594139608yqt4501028473" id="yiv5594139608yqt70074"><div style="font-family:Arial, sans-serif;font-size:10pt;" id="yui_3_16_0_1_1453483958434_8317"><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 id="yui_3_16_0_1_1453483958434_8316">Brian Cox</div></div></div>
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