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For an 1828mm cylinder the ABS calculators are showing 25 feet
maximum depth. The material properties I found were<br>
<br>
Modulus of Elasticity: 150000psi<br>
Yield Stress: 4000psi<br>
Poisson Ratio: .5<br>
<br>
Jon<br>
<br>
<br>
On 4/24/2014 9:17 AM, Dean Cropp via Personal_Submersibles wrote:<br>
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<div>Hi everyone..</div>
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<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>
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<div><a moz-do-not-send="true"
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>
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<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>
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<div>I have always looked at having HDPE battery pods, what not
the whole sub?</div>
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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 moz-do-not-send="true"
href="mailto:croppycam@bigpond.com">croppycam@bigpond.com</a></div>
<div>s: croppycam</div>
<div>w: <a moz-do-not-send="true"
href="http://www.accessallangles.com">www.accessallangles.com</a></div>
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