1 Jul ASTM D Standard Practice for Viscosity-Temperature Charts for Liquid Petroleum Products. standard by ASTM International, 07/01/. Based on ASTM D equation: [(v+)=(T+)] Fuel Oil data from CIMAC ; Ignition Index from BS MA (log is base 10), In the. Scope ASTM Adjuncts: The kinematic viscosity-temperature charts (see Figs. 1 Adjunct D , Viscosity-Temperature Charts 1–73 and 2) covered by this .
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To find out more, including how to control cookies, see here: This increases the reliability of extrapolation to higher temperatures. Calculate the blend viscosity using: The conversion is based on a volume correction factor of 1, for ease of calculation.
ASTM D / Viscosity-temperature extrapolation :: Anton Paar Wiki
After entering r341 required data for the 1st component, select number 2 in the drop-down list, and fill in all necessary data for the second component, and so on for all components that you want to incorporate in the calculation. In order to calculate the resulting viscosity when blending two or more components together the following astk are popular ones in use: After selecting a component number, enter the required data in the various fields.
For each component the kinematic viscosity at two temperatures must be known. This article focuses on the calculation of a blend viscosity of a fuel or lubrication oil mixture. One of the much researched topics in the petroleum industry is the topic of blending; Fuel oils and lubrication oils are often blended from a variety of components to achieve a certain viscosity in the astmm product.
This test method details the standard procedure for plotting viscosity-temperature charts that ascertain the kinematic viscosity of a petroleum oil or liquid hydrocarbon at any temperature within a limited range, provided that the kinematic viscosities at two temperatures are known.
There is a button in the right hand corner to clear any entries made earlier. For an introductory video on youtube, here is a link: The first method that will be discussed here is the calculation using the Refutas equation, since this is a very easy method to implement in an excel spreadsheet, or in a smartphone app, and it requires a minimum of known parameters. The Refutas equation, as proposed by British Petroleum is a three step algorithm. Next to the button there is a drop-down list with numbers 1 — 10, indicating each component.
By continuing to use this website, you agree to their use. A tool to calculate blend viscosity, flash point, pour point and density based on a maximum of 10 components.
Conversely if you enter Mtons once you enter a density the volume will be calculated and entered automatically. Historical Version s – view previous versions of standard.
Link to Active This link will always route to the current Active version of the standard. The first two tools use the Refutas equation to calculate blend viscosity and fractions.
Calculate the fraction of X1 and X2 for a quantity of MT, with viscosities of and cSt respectively, and a target viscosity of cSt: All entries up to 10 components are saved in a database as they are being entered and can be retrieved at any time.
D41 abstract is a brief summary of the referenced standard.
A tool to calculate the fractions of two components required to obtain a blend with a certain viscosity, based on the given viscosities of the two components. How to use the viscosity tools: ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
A tool to calculate the viscosity at a certain temperature, or the temperature corresponding to a certain viscosity, on the basis of a given viscosity at a reference temperature. It calculates the Viscosity Blend Index for each component, then sums up the product of each VBI and its weight fraction, and finally establishes the blend viscosity by using the formula for the Viscosity Blend Index in reverse. Viscosity Blender — calculate fractions using two components.
Also the settings screen has been slightly amended, so that the number of decimals chosen for Barrels is now also applied to Gallons. The resulting viscosity, flash point, pour point and density will show up and update automatically as you enter data.
Download dropbox for free. Calculate the Viscosity Blend Number or Index for each component using the following formula: Below picture shows the new Viscosity Blender tab top part. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
The last tool relies on a modified V50 formula, and is intended for sstm oils, and only for indicational purposes. Once the two lines have been plotted, it is easy to construct either the blend viscosity based on the fractions used for each component, or construct the fractions for each component based on a target viscosity.