Viscosity-temperature-graphs, looking for form 3

[phex]

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

 

[25362]

BP sells these graphs for blending kinematic viscosities on a weight basis. If I remember correctly from my lube-and-wax days the graph is named BP.6 .
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.

 

[phex]

very nice 25362, thanks alot. this is helpful for BUYING one, but as i only need one sheet, have time only till tomorrow to do the graphing and don't have any contacts to BP and/or ASTM, i'd like to inquire - though not legally correct - about a scanned version as pdf. can anybody provide it?

 

[25362]

If you give me a fax number I think I could fax a copy shortly.

 

[phex]

can you provide an email adress? i don't really want to post my fax number here in the fora.

thx for your help,
chris

 

[25362]

The BP chart found is from 1 to 200 cS. If you are still interested I'll give you a friend's e-mail who would be sending it to you. Please confirm.

 

[phex]

this would probably save my arse, if you excuse my french.

 

[25362]

To phex, you may send your e-mail to:
isai@zahav.net.il

 

[phex]

thanks alot, 25362. this deserves more than one point, readers =)

thx,
chris

 

[jmw]

Hydrocarbon blending is a common problem e.g. residual oil plus cutter stock to produce heavy ful oils, crude oil plus solvent for pipeline viscosity and density control.
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

http://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

http://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.