Viscosity-temperature-graphs, looking for form
Viscosity-temperature-graphs, looking for form
(OP)
I need to make some diagrams by the specifications provided by the customer (lube oil dewaxing, mixture viscosity for oil/solvent-mixtures). to do this, i need a linear abscissa and a double-logarithmic ordinate. i'm willing to use forms without fixed scale, or i'll need a viscosity scale 1..70000 cSt. thanks alot for your help all.
chris
chris





RE: Viscosity-temperature-graphs, looking for form
BP Trading Limited also had a viscosity/temperature chart including a blending scale for two components, and a blending index scale for more than two components.
The kin. visc. scale is based on log.log(v+0.8) where v is in centistokes. Printed in England by Alfred Cooper & Sons Ltd.
It stands to reason that also ASTM has this kind of graphs. Worth to verify.
RE: Viscosity-temperature-graphs, looking for form
RE: Viscosity-temperature-graphs, looking for form
RE: Viscosity-temperature-graphs, looking for form
thx for your help,
chris
RE: Viscosity-temperature-graphs, looking for form
RE: Viscosity-temperature-graphs, looking for form
RE: Viscosity-temperature-graphs, looking for form
isai@zahav.net.il
RE: Viscosity-temperature-graphs, looking for form
thx,
chris
RE: Viscosity-temperature-graphs, looking for form
Two things help here: first is the temperature viscosity relationship and i have found that the ASTM D341 equation is as good as they get. Visit www.solartronmobrey.com and follow the fuel oil link to find an Excel spreadsheet with this all worked out, or post your e-mail and i'll send you my latest version of this.
Second is a blend calculator. Some of these can be dwonloaded or are available free from the marine fuel oil companies. I have versions from DNV PS, Shell Marine Fuels, Exxon Mobil Marine Fuels and you can download one from www.steamesteem,com.
Now i am not saying they will be universally applicable but they do work well on the hydrocarons i have dealt with.