[PSUBS-MAILIST] High Pressure Air System Thread Sealants

[Hugh Fulton via Personal_Submersibles]

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 

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