[PSUBS-MAILIST] High Pressure Air System Thread Sealants

[hank pronk via Personal_Submersibles]

 Alan,You can buy O2 tape that is green, but you can use white tape if the tape does not protrude past the treads.  At lest that is what I read.  I have used the green stuff, but typically O2 fittings need nothing due to the close tolerance machining of O2 parts.Hank
    On Friday, December 29, 2017, 9:05:01 PM MST, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 Noticed when visiting Nuytco that they used thread tape on their O2supply to their bellows add system. Wondered about it at the time as I thought it would be inflammable. There is a high pressure gauge showing here so looks like they are using tape on the high pressure O2 line.Alan


Sent from my iPad
On 30/12/2017, at 2:34 PM, Hugh Fulton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:



#yiv6943891047 #yiv6943891047 -- _filtered #yiv6943891047 {font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;} _filtered #yiv6943891047 {font-family:Tahoma;panose-1:2 11 6 4 3 5 4 4 2 4;} _filtered #yiv6943891047 {panose-1:0 0 0 0 0 0 0 0 0 0;}#yiv6943891047 #yiv6943891047 p.yiv6943891047MsoNormal, #yiv6943891047 li.yiv6943891047MsoNormal, #yiv6943891047 div.yiv6943891047MsoNormal {margin:0cm;margin-bottom:.0001pt;font-size:12.0pt;}#yiv6943891047 a:link, #yiv6943891047 span.yiv6943891047MsoHyperlink {color:blue;text-decoration:underline;}#yiv6943891047 a:visited, #yiv6943891047 span.yiv6943891047MsoHyperlinkFollowed {color:purple;text-decoration:underline;}#yiv6943891047 p {margin-right:0cm;margin-left:0cm;font-size:12.0pt;}#yiv6943891047 span.yiv6943891047EmailStyle18 {color:#1F497D;}#yiv6943891047 .yiv6943891047MsoChpDefault {} _filtered #yiv6943891047 {margin:72.0pt 72.0pt 72.0pt 72.0pt;}#yiv6943891047 div.yiv6943891047WordSection1 {}#yiv6943891047 
Like Brian and Hank,

 Thread tape 2-1/2 turns and anti-seize. Don’t put on too much tape. Don’t leave tape hanging over the thread end as it will end up in the system.  Start about ½ a thread back.

 I tried Loctite many years ago with bad results but that was with natural gas.  We do high pressure gas for a living. White tape for air and yellow for gas.  Yellow is generally thicker.  Some cheap white tapes are really thin so compensate.

https://northerncal.swagelok.com/blog/bid/88017/skill-applying-ptfe-tape-to-tapered-pipe-threads

  

Hugh

 

  

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of Brian Cox via Personal_Submersibles
Sent: Saturday, 30 December 2017 1:57 PM
To: Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST] High Pressure Air System Thread Sealants

  

Steve,   I used just Teflon tape and I had some tiny leaks.  I would recommend using the Teflon tape and also a viscous product such as Never-seize.  I had to back everything out and re-do all my fittings just for piece of mind.  In addition the Never-seize is good for stainless to stainless fittings.  I didn't have any leaks after that.

 

Brian

 

 

--- personal_submersibles at psubs.org wrote:

From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Steve McQueen via Personal_Submersibles <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] High Pressure Air System Thread Sealants
Date: Sat, 30 Dec 2017 00:02:14 +0000 (UTC)

Steve,

Tread tape has worked reliably for me for many years and projects.  I tried a liquid product one time and it was garbage.

Hank

  

On Friday, December 29, 2017, 4:14:23 PM MST, Steve McQueen via Personal_Submersibles <personal_submersibles at psubs.org> wrote: 

  

  

All, I am starting to plumb together my K250 HP Air distribution system (3,500 psi). Looking for feedback. 

For the NPT connections I am choosing a LOCTITE product:



I’ve read Teflon tape technically isn’t the best for HP applications but I’ve seen it used.  Anyone have a proven best practice?

Thanks,

Steve 

_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
_______________________________________________ Personal_Submersibles mailing list Personal_Submersibles at psubs.org http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles 

_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles

_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles
  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20171230/0db90599/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image1.JPG
Type: image/jpeg
Size: 105084 bytes
Desc: not available
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20171230/0db90599/attachment-0001.jpe>