[PSUBS-MAILIST] CNG tank

[hank pronk via Personal_Submersibles]

 Brian, I have no idea what pressure it can take with no air in it.  It should be a reasonable amount given the thickness of the shell.  My tanks have a strait thread  with an o-ring.  It makes no sense to have a taper thread with an o-ring.  The taper thread (pipe thread) seals on its own.  I have steel CNG tanks with a pipe thread valve but I am sure the type 4 carbon  fibre tanks are not pipe threadHank
    On Tuesday, May 28, 2019, 5:51:48 PM MDT, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 Hank ,   Any idea what pressure those tanks would take with no internal pressure ?
Brian


--- personal_submersibles at psubs.org wrote:

From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] CNG tank
Date: Tue, 28 May 2019 22:11:48 +0000 (UTC)

 Not on mine, all right hand threadHank
    On Tuesday, May 28, 2019, 3:48:21 PM MDT, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 There is a fill fitting on this tank that seems like it is reverse thread


--- personal_submersibles at psubs.org wrote:

From: hank pronk via Personal_Submersibles <personal_submersibles at psubs.org>
To: Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org>
Subject: Re: [PSUBS-MAILIST] CNG tank
Date: Tue, 28 May 2019 21:40:58 +0000 (UTC)

 Brian,The fittings are no problem, I just went to the hydraulic shop and got new ones.Hank
    On Tuesday, May 28, 2019, 2:48:18 PM MDT, Brian Cox via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  
 
 My CNG tank finally got here !   Very impressive tank, looks like there are standard fittings on it , so shouldn't be much trouble putting the appropriate valves on.  
Brian

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