Re: high pressure hoses & connectors

["Karl Fuller" <fullerk@voyager.co.nz>]

Good point about being in with a potential leak ! Would it be a good idea to
have a flow restrictor after the bottled air in order to give a chance to
shut of the supply in the rare event of a burst tube or blown fitting ?

What do you think, it could be an oriface restrictor.

Ideas ?
Karl
----- Original Message -----
From: Alec Smyth <asmyth@hsomail.com>
To: Design Team <sublist-owner@yel-o-sub.com>; PSUBS
<Personal_Submersibles@psubs.org>
Sent: 31 October 1999 17:45
Subject: high pressure hoses & connectors


> Hi gang,
>
> I am looking for hardware for the high pressure lines in my future sub,
and
> I'm unsure what to use. The situation is this; I need to connect several
> pressure-compensated cavities like actuators and trolling motors. The
tubing
> has to go both inside and outside the hull. I'm familiar with the HP
braided
> rubber hoses and 0-ring sealed fittings found in scuba gear, but in this
> case I'd rather go with very small bore copper tubing if it would work.
>
> I am looking through my MSC catalog and there's a gazillion types of
fitting
> and hose, but the pressure specs are not clear. For example, "flare tube
> fittings" which seem to be the most common sort say "generally considered
a
> 3,000 psi fitting", and most fittings don't even specify a pressure at
all.
> Since I am going to be in a confined space with this stuff, I would like
to
> be pretty sure nothing will blow out at 3,000 psi, not "generally" sure.
>
> Does anyone have a good source, or an opinion on what type of fittings and
> tube to use? Are there any special considerations, such as wall thickness
of
> the tubing?
>
> thanks!
>
> Alec Smyth
>
>
>