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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The last tool relies on a modified V50 formula, and is intended for fuel oils, and only for indicational purposes.
The same is illustrated here with a picture of an example ASTM temperature chart: Viscosity Blender — calculate fractions using two components. The charts here presented provide a significant improvement in linearity over the charts previously available under Method D — 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.
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. Historical Version s – view previous versions of standard. Next to the button there d31 a drop-down list with numbers 1 — 10, indicating each component.
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. There is a button in the right hand corner to clear any entries made earlier.
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 final product. In order to calculate the resulting viscosity when blending two or more components together the following methods are popular ones in use: Finally and most importantly, three viscosity tools have been added to the app: 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.
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. 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.
To find out more, including how to control cookies, see here: Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. A tool to calculate blend viscosity, flash point, pour point and density based on a maximum of 10 r341.
The resulting viscosity, flash point, pour point and density will show up and update automatically as you enter data. After entering all required data e341 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.
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Calculate the blend viscosity using: This increases the reliability of extrapolation to higher temperatures. Also the settings screen has been slightly amended, so that the number of decimals chosen for Barrels is now also applied to Gallons. For an introductory video on youtube, here is a link: This article focuses on the calculation of a blend viscosity of a fuel or lubrication oil mixture.
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 ast each component based on aetm target viscosity. Let mass fraction 1 be X1 and mass fraction 2 be X2; it then follows that: Download dropbox for free. Link to Active This link will always route to the current Active version of the standard.
After selecting a component number, enter the required data in the various fields. All entries up to 10 components are saved in a database as they are being entered and can be retrieved at any time.
A tool to calculate the asrm at a certain temperature, or the temperature corresponding to a certain viscosity, on the basis of a given viscosity at a reference temperature. The Refutas equation, as proposed by British Petroleum is a three step algorithm. Calculate the fraction of X1 and X2 for a quantity of MT, with viscosities of and cSt respectively, and a target viscosity of cSt: The first two tools use the Refutas equation to calculate blend viscosity and fractions.
For c341 component the kinematic viscosity at two temperatures must be known. By continuing to use this website, you agree to their use. The conversion is based on a volume correction factor of 1, for ease of calculation. Calculate the Viscosity Blend Number or Index for each component using the following formula: Conversely if you enter Mtons once you enter a zstm the volume will be calculated and entered automatically.