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<DIV><FONT size=3>Dean,</FONT></DIV>
<DIV><FONT size=3>Here's one summary on the pros and cons of
HDPE.</FONT></DIV>
<DIV><A
href="http://www.ides.com/pm/HDPE.asp">http://www.ides.com/pm/HDPE.asp</A></DIV>
<DIV>Jim T.</DIV>
<DIV> </DIV>
<DIV>
<DIV>In a message dated 4/24/2014 8:18:03 A.M. Central Daylight Time,
personal_submersibles@psubs.org writes:</DIV>
<BLOCKQUOTE
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<DIV>Hi everyone..</DIV>
<DIV><BR></DIV>
<DIV>I an still toying with two designs of PSUB, one larger, steel and with an
AUX diesel engine 3PAX…. But also with a smaller 2PAX more mobile system and
have been looking into the possibility of using HDPE as a hull material for a
small 100msw PSUB</DIV>
<DIV><BR></DIV>
<DIV><A
title=http://www.vinidex.com.au/products/pe-pipe-systems/pe-pressure-pipe/
href="http://www.vinidex.com.au/products/pe-pipe-systems/pe-pressure-pipe/">http://www.vinidex.com.au/products/pe-pipe-systems/pe-pressure-pipe/</A></DIV>
<DIV><BR></DIV>
<DIV>There is off the shelf (Sort of) 1000mm OD pipe here in Australia with a
60mm wall thickness but I have also come across a 1360mm-OD and 1650mm-OD pipe
again with 60mm wall thickness that may be available. HDPE can be welded,
drilled and tapped quite well and using fittings/penatrators made of delrin
with o'ring seals has worked well on some camera housings I have made.</DIV>
<DIV><BR></DIV>
<DIV>Has anyone looked further into this? is the wall thickness enough to just
have bulkheads instead of stiffeners? no corrosion problems and it is super
slippy in the water!</DIV>
<DIV><BR></DIV>
<DIV>I have always looked at having HDPE battery pods, what not the whole
sub?</DIV>
<DIV><BR></DIV><BR>
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<DIV>Dean Cropp</DIV>
<DIV><BR></DIV>
<DIV>~ Underwater DOP ~ Ocean Wrangler ~ </DIV>
<DIV><SPAN class=Apple-tab-span style="WHITE-SPACE: pre"></SPAN>Sydney :
Australia</DIV>
<DIV><BR></DIV>
<DIV>p: 0416287833 (Int p: +61 416 287 833)</DIV>
<DIV>e: <A title=mailto:croppycam@bigpond.com
href="mailto:croppycam@bigpond.com">croppycam@bigpond.com</A></DIV>
<DIV>s: croppycam</DIV>
<DIV>w: <A title=http://www.accessallangles.com/
href="http://www.accessallangles.com/">www.accessallangles.com</A></DIV>
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class=Apple-interchange-newline></DIV><BR>=<BR><BR>_______________________________________________<BR>Personal_Submersibles
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