Hi,
Copper tubing "work" hardens from vibration, becomes brittle
and splits/cracks.
Leo
QCI
At 01:50 PM 03/06/2002 -0500, you wrote:
>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
>
>
>
>
Back to the Home of the Forward Look Network