×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

API Factors for hydraulic oils?

API Factors for hydraulic oils?

API Factors for hydraulic oils?

(OP)
Using the API calculation of base density from the density at another temperature, the factors used are:

Product           Density range       K0              K1
Gasolines       654     779     346.42278       0.43884
Kerosines       779     839     594.5418        0
Fuel Oils       839    1075     186.9696        0.48618
Crude Oil       771     981     613.97226       0

If I want to determine the base density of hydraulic oils are are these factors OK or are there any better values for ko and k1 to use?

JMW
www.ViscoAnalyser.com
 

RE: API Factors for hydraulic oils?

as far as i know this conversion was basically developed for fuels and crude. although hydraulic oils fall say in a density bracket of 860 - 890, they differ in composition from crudes, containing usually more straight and branched paraffinic components and less aromatics and cyclic paraffinics.

there is another way of calculating the sought after density with the following formula:

dx=d15.[1-0.0007(Tx-15)]

with dx=density at temperature x, d15 is density at 15 degrees C, 0.0007=volume-temperature expansion coefficient, Tx the temperature at which the density has to be calculated in deg C.

This formula is usually sufficiently adequate for lubricants based on mineral oil in say a temperature bracket of 0 to 120 degr C.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources