<DIV style="font-family:Arial, sans-serif; font-size:10pt;"><DIV>Thanks Sean !</DIV><DIV> </DIV><DIV>Brian<BR><BR>--- personal_submersibles@psubs.org wrote:<BR><BR>From: "Sean T. Stevenson via Personal_Submersibles" <personal_submersibles@psubs.org><BR>To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><BR>Subject: Re: [PSUBS-MAILIST] Viewports - steel or stainless<BR>Date: Thu, 06 Aug 2015 09:33:52 -0500<BR><BR></DIV><P dir="ltr">https://parts.cat.com/wcs-static/pdfs/PEHJ0264.pdf</P></DIV>
<P dir="ltr">Sean<BR>
<BR><BR><DIV>On August 6, 2015 9:27:10 AM CDT, Brian Cox via Personal_Submersibles <personal_submersibles@psubs.org> wrote:<BLOCKQUOTE style="margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex; border-left-color: rgb(204, 204, 204); border-left-width: 1px; border-left-style: solid;">
<DIV style="font-family: Arial, sans-serif; font-size: 10pt;"><DIV>Hi Vance,</DIV><DIV> I assumed all grease was non-soluble , where would one find this type of grease?</DIV><DIV> </DIV><DIV>Brian<BR><BR>--- personal_submersibles@psubs.org wrote:<BR><BR>From: via Personal_Submersibles <personal_submersibles@psubs.org><BR>To: personal_submersibles@psubs.org<BR>Subject: Re: [PSUBS-MAILIST] Viewports - steel or stainless<BR>Date: Thu, 6 Aug 2015 07:38:11 -0400<BR><BR></DIV><FONT color="black" face="Arial, Helvetica, sans-serif" size="3"></FONT><DIV><FONT color="black" face="Arial, Helvetica, sans-serif" size="3"><FONT size="3" style="color: black; font-family: Arial, Helvetica, sans-serif;">Andre,</FONT>
</FONT></DIV><DIV><FONT size="3"><FONT face="Arial, Helvetica, sans-serif">Steel will be fine with the maintenance you suggest. Be sure to use a non-soluble grease. And the good news is that SS bolts won't gall as a rule in high carbon steel. As proof, I offer the Perry subs, which have without a doubt done more dives in salt water than all other submersibles put together. And every one of them has hull matched steel inserts for viewport and penetration plates. We painted everything, sanded the mating surfaces smooth, and went on about our business. No problem. Even those shiny hatch mating surfaces you see in the pictures or Perry boats are A537 or A516Gr70 steel with monel cladding, rather than the softer and more damage prone stainless. Plus, stainless can have stress corrosion problems in oxygen starved atmospheres, and takes a lot of experience to use effectively.</FONT></FONT></DIV>
<DIV><FONT size="3"><FONT face="Arial, Helvetica, sans-serif">Vance<BR>
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<DIV style="color: black; font-family: helvetica, arial; font-size: 10pt;">-----Original Message-----<BR>
From: André Eriksen via Personal_Submersibles <personal_submersibles@psubs.org><BR>
To: Personal Submersibles General Discussion <personal_submersibles@psubs.org><BR>
Sent: Thu, Aug 6, 2015 6:27 am<BR>
Subject: [PSUBS-MAILIST] Viewports - steel or stainless<BR>
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Hi,
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Is steel or stainless mostly used for viewports?
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Have you had any problems with rust in the threads when using steel and diving in saltwater?
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I would imagine filling the threads with grease, and inspecting them on a regular basis should be fine.
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Was hoping I could go with steel, as I can get them cut out from the same plate as the frontdome seat.
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Thanks,
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André
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