stainless chiller piping contraction

[drwelding]

Hello, I am currently working on a chiller project, the coolant is dynalene HC-50 and will be chilled to -40C. I have a supply and return line on a closed loop system with the length of each line being about 35' long. each line has 5 90 degree elbows and im running 1" 304 stainless tubing. i am trying to figure out if the contraction of the tubing when chilled is going to be enough to cause me any issues. attatched is a quick drawing of the piping with rough dimensions that i added for material estimation. Hoping someone can give me some insight. Thank you.

 

[EdStainless]

I doubt it for two reasons.
First it is only 35'. So even if it was straight the TE would only be 9.6e-6*35*12*125=0.5"
And in your case because of all of the elbows not all of the contraction is in one direction and the system has flexibility.
Typically the only rigid mounts would be near the ends with middle allowed to move.

What is the visc of this fluid at -40? The pressure drop with those elbows must be large.

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P.E. Metallurgy, consulting work welcomed

 

[MJCronin]

Doctor,

Your isometric drawing is half-completed and nearly unreadable ... you have obviously never done this kind of thing before.

You have no Piping Code or Standard that governs your design ... Calculation of "the contraction" tells you nothing...

You seem to be trying to dump responsibility of this engineering work onto others because you work for an MBA.. Witness:

i am trying to figure out if the contraction of the tubing when chilled is going to be enough to cause me any issues.

You do, however, seem to have a list of the cost of all components in the upper left .... Who bears responsibilty if the line breaks and someone gets injured ?.... Certainly not your MBA Master ...

I agree with EdStainless

Your question should have been posted in the "Piping and Pipelines" forum ........ IMHO

Who disagrees with me ??

MJCronin
Sr. Process Engineer

 

[EdStainless]

The other issue is what pipe connections are you using and what load will they handle?
Don't tell us that you plan on using NPT threads, you will have leaks everywhere.


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P.E. Metallurgy, consulting work welcomed