Correction Factor for 60% ethylene glycol

Jim Cooke

I have the correction factor of x.87 for 50% ethylene glycol, but cannot find the correction factor for 60%.  Can anyone help me?

Thanks!

Jim Cooke - Mechanical Solutions NW

hot_rod

yes

all of the glycol engineering manuals I have, from various manufacturers end at 50%.



Dow suggest a max. of 50- 55% be used in the DowFrost manual a PG glycol..



I know many solar and hydronic components are tested and rated to a 50% glycol concentration. Does the job require 60%, seems like a strong blend? Why the EG?



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Jean-David Beyer

Freezing points of glycol solutions.

Here are tables for both ethylene glycol and propylene glycol. I post both because, depending on what you want to do with it, you may be required to use proplyene glycol; e.g., in systems where there is a risk of contaminating potable water with the the glycol-protected solution.



[url=http://www.engineeringtoolbox.com/ethylene-glycol-d_146.html]http://www.engineeringtoolbox.com/ethylene-glycol-d_146.html



[url=http://www.engineeringtoolbox.com/propylene-glycol-d_363.html]http://www.engineeringtoolbox.com/propylene-glycol-d_363.html

Jim Cooke

60% glycol in Alaska

Hi Hot Rod,

60% is actually common in Alaska. 

Jim

KevinCorr

Why 60%?

Where are you in Alaska? I never heard of over 50% here in Fairbanks. I have tested mason jars of glycol at various %. We froze 6 jars of glycol mix from 5% to 50% and checked them at descending temps to see where each the mix froze or slushed. We did this 35 yrs ago outside at the Municipal Utilities and again last summer in the lab at Flowline pipeline company.



You cannot freeze 50% propelene glycol even at -50 F below zero!

Also surprising is that no jars broke at any temp with even 5%. It slushed up but did not break.

hot_rod

best to check with the manufacturer

and get the EXACT freeze and burst data and correction factors from them for a specific fluid. The numbers vary from brand to brand and also vary in different versions of the same brand.



Here is an example of the Nobel Super 100 fluid. It shows freeze protection at 50% as well as full strength.



I'm sure Drew has the correction factors, contact him at Nobel.



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hot_rod

oops, an RV fluid in above post

Here is the sheet for a hydronic fluid. Or go to the Nobel, or any other glycol brand for that matter and check the specs.



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