The tubing is available as hypodermic tubing in at least 6 foot lengths. I
use it at work quite often, in .109 diameter. Other sizes are available.

RJ

"Allan Adler" wrote in message
...

One can regard the needle of a syringe as a very thin pipe, but it is also
a very short pipe. Syringes are used in microscale organic chemistry labs
to transfer small quantities of fluids. If one wanted to avoid syringes
and instead transfer the same quantities of liquids along a pipe from a
small tank of the liquid, I imagine one would need a pipe as thin as a
syringe needle. At any rate, one can choose to do so at the design level.
(I realize there might be more resistance along the pipe and considerable
difficulty clearing a blocked pipe and possible problems due to sagging of
the pipe, but never mind.)

I have no laboratory and no shop and have no plans to actually do any of
this.
I'm just thinking about how it might be done. Since the solution involves
a problem in metal work, I think it is appropriate to ask about it here.

The questions a
(1) How would one make a long metal pipe (e.g. a few feet) which is as
thin
and as hollow as a syringe needle?
(2) And what if one wanted the pipe to follow some path other than
straight?
Probably it is too thin to bend without closing it off, no matter how
carefully one tries to do it. Maybe one has to make miniature versions
of all of the standard plumbing fixtures and, to make sure the
connections
are strong enough, one allows the outer diameters of the pipes to
increase
where the threads are. So that feature of the pipe design would also
have
to be included.

Ignorantly,
Allan Adler



************************************************** **************************
*
*
* Disclaimer: I am a guest and *not* a member of the MIT Artificial
*
* Intelligence Lab. My actions and comments do not reflect
*
* in any way on MIT. Moreover, I am nowhere near the Boston
*
* metropolitan area.
*
*
*

************************************************** **************************