[PSUBS-MAILIST] Penetrator materials

[Alan James via Personal_Submersibles]

Pete,in addition to what Sean said, the penetrators are to be water tighteven if the cable is shorn off!ABS submersible rules refers you to the Steel Vessel Rules, & a sizing chart (table 6) inpart 4 chapter 8 & section 3.Alan

      From: Pete Niedermayr via Personal_Submersibles <personal_submersibles at psubs.org>
 To: Personal Submersibles General Discussion <personal_submersibles at psubs.org> 
 Sent: Friday, May 19, 2017 5:33 AM
 Subject: Re: [PSUBS-MAILIST] Penetrator materials
   
Are there any standards regarding electrical penetrators (battery pod to pressure hull) ie electrode diameter,insulator thickness ?  
--------------------------------------------
On Wed, 5/17/17, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:

 Subject: Re: [PSUBS-MAILIST] Penetrator materials
 To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
 Date: Wednesday, May 17, 2017, 7:08 PM
 
 Thanks
 Sean,I filed
 a conical penetrator design, but had forgotten about
 it!Alan
 
 Sent from my iPad
 On
 18/05/2017, at 9:28 AM, Sean T. Stevenson via
 Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 
 If you machine the
 hole through the penetrator as a conical cavity rather than
 cylindrical, and then use a potting epoxy with some
 compliance / flexibility, the pressure acting to push the
 potting compound into the hole will also develop some
 increased compressive force around the electrodes.
 Sean
 
 
 
 
 On May 17, 2017 1:55:51 PM
 MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 Hank,If
 I cover everything with the glue & then the
 polyurethane, I won't need to rely onthe epoxy for sealing.
 If the cable was cut then the system would rely on the
 epoxyas a
 back up. At that stage I could put up with a temporary
 dribble; the electrics wouldbe shorting out as
 well. I will be wary of stripping back enough of the wiring
 sheath,but
 failure can also occur between the epoxy & wall of the
 penetrator.Cheers Alan
 
 Sent
 from my iPad
 On 18/05/2017, at
 12:02 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
 wrote:
 
 Alan,That
 is not correct, the epoxy will not stop the water past 1,000
 psi completely.    If the wires are stripped back
 further so the sealant creates an extra layer against
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