[labnetwork] Bending coaxial

[Dennis Schweiger]

Matthieu,

that's typical of the way we've installed it at UofM, and how I've done it
on the outside (tens of thousands of feet of tubing).  Just make sure they
use a bender that yields a radius of 10 times the diameter of the carrier
(inner) tube.  Also make sure they use centering clips for the inner tubing
at every weld joint on the external jacket.  You don't want to weld the two
tubes together.......

I'd recommend that you look at some of their work (at other customers) for
neatness, uniformity, as well as attention to detail.  Make sure you have
them generate weld coupons you can inspect for all of their work/sizes.
You definitely don't want any "sugaring" on the inside of your carrier
tube, especially with reactive gases.

Dennis Schweiger
University of Michigan/LNF

734.647.2055 Ofc

On Tue, Dec 16, 2014 at 11:33 PM, Matthieu Nannini, Dr. <
matthieu.nannini at mcgill.ca> wrote:
>
>  Dear colleagues,
>
>  A local company is proposing to bend coaxial SS tubing to install a
> double containment gas line thus removing the need for welded 90° elbows.
> did you ever see that ? Any comment would be helpful !
>
>  Thanks
>
>  Matthieu Nannini
>
> Début du message réexpédié :
>
>  *De: *"Matthieu Nannini, Dr." <matthieu.nannini at mcgill.ca>
>  *Objet: **Bending coaxial*
>  *Date: *15 décembre 2014 15:31:10 UTC−5
>  *À: *Tom Britton <tbritton at criticalsystemsinc.com>
>
> Hi tom,
>
> A local company here can bend coaxial tubing. They quoted me 4800$ for the
> 2 lines BCl3 and SiCl4.
>
> What do you think of bending ? They told me the 1/4 wasn’t kinked at all.
>
> Matthieu
>
>
>
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