Re: [PSUBS-MAILIST] Pressure Test

["Emile van Essen" <AiResearch@hetnet.nl>]

don't (2 times)

First, if you want to test a pressure vessel , do it with a fluid. This
prevents flying things if anything go wrong.
second, by pressurising from inside you create tensile stress in the hull.
Steel is very strong in such a load.
Pressure from outside will create bending or buckling (dont know the exact
english word) stress. The resistance will depend on the material stiffness,
wall thikness and frame constuction.
Pull a vacuum and you test it to 9.8 metres depht.

Groet, emile

----- Original Message -----
From: "Pierre Poulin" <pipo305@hotmail.com>
To: <personal_submersibles@psubs.org>
Sent: Saturday, March 29, 2003 2:58 AM
Subject: [PSUBS-MAILIST] Pressure Test


> Hi people!
>
> If I pump air inside my sub (unmanned) and it can stand 60 psi without and
> damage. Does it mean that it would resist 60 psi from water pressure in
the
> water (at 120 foot)?
>
> It could be an easy way to test usable deep.
>
> What do you think about that?
>
> Pierre Poulin
> "I may have too much pressure inside my head..."
>
>
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