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It sounds like the wall thickness would have to increase by
quite a bit to come up to the nearly 3X that the SS lines will handle. Lets hope
that peace of info by Dick B. will finally put this thread to rest.
John
----- Original Message -----
Sent: Monday, June 03, 2002 11:50
AM
Subject: Re: IML: Brake line
discussion
DB, good find! Is this the dimension used on brake
lines?
Also, if I was asked to design a copper brake line, I would make
the wall
thickness larger (either by reducing the ID a bit, and/or by
increasing the
OD, preferably the 2nd). I am not sure though how
this would be compatible
with the fittings, but I think it would
work. Point is though that lack of
material strength can be
compensated by thicker material. Also, I would
probably specify a
higher grade copper alloy, and I would try to achieve a
design factor of
at least 2. Problem is of course, as the pipe gets
thicker/stronger
material, it may get harder to bend.
D^2
At 10:47 PM 6/2/2002 -0700,
you wrote:
>My handy dandy McMaster-Carr catalog tells
me:
>
>5/16" OD Copper tubing Max Pressure 1197
PSI
>5/16" OD 304 Stainless Max Pressure 3500
PSI
>
>Unfortunately, the type of steel tubing used on cars isn't
listed, but the
>type they do list (carbon steel) is about the same
strength as 304
>Stainless.
>
>In service, I calculate that
the peak pressure in a panic stop in the brake
>lines of a disk brake
car is somewhere in the range of 1200 PSI.
>
>Dick
Benjamin
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