Petroleum Products QC

Earlier following posts detailing the methodology of estimating approximate  C3 and C4 components of LPG from density@15C and RVP figures are published recently. Estimation of C3 & C4 percentage in LPG from Density & Estimation of C3 & C4 percentage in LPG from Vapor Pressure Similar Apps on Petroleum Calculations developed by RJ Patel- see here. Now an App based on above and ASTM D2598 is published. Steps : 1)  Enter Density at 15 C or/and Vapor Pressure @ 37.8C of LPG 2)  Read below  C3 and C4 with assumption of C2 and C5 impurities =1 % V. Prediction of C3 & C4 components of LPG Mobile App Prediction of  C3 - C4 Components of LPG - App as seen in  Laptop/PC You can see other Apps of LPG based on ASTM D2598 at following: An App for Calculation of Vapor pressure of Liquefied Petroleum (LP) Gases from Compositional Analysis based on ASTM D2598.    An App for Calculation of Relative Density of LPG from Compositional Analysis bas

The App is based on ASTM D2598 standard. This Apps covers, by compositional analysis, the approximate determination of  Motor Octane Number (MON)  of commercial propane, special-duty propane, commercial propane/butane mixtures, and commercial butane as per ASTM D2598 - Standard Practice for Calculation of Certain Physical Properties of Liquefied pet roleum (LP) Gases from Compositional Analysis. Similar Apps on Petroleum Calculations developed by RJ Patel- see here. The composition of sample of LPG is obtained by using test method D2163 or other acceptable method. From the analysis (expressed in liquid volume percent) the  Relative Density at 15.6C (60F)  of the sample may be determined.   Steps :  a) Enter the Volume % of individual components of Gas.  Ensure total % of all the gases is 100. b) Read below in last cell -  Motor Octane Number (MON)  of the sample. LPG MON APP Mobile Conversion of a compositional analysis from mole, gas volume or weight b

The App is based on ASTM D2598 standard. This Apps covers, by compositional analysis, the approximate determination of Relative Density at 15.6C (60F) of commercial propane, special-duty propane, commercial propane/butane mixtures, and commercial butane as per ASTM D2598 - Standard Practice for Calculation of Certain Physical Properties of Liquefied pet roleum (LP) Gases from Compositional Analysis. Apps developed on other Petroleum Calculations - see here. The composition of sample of LPG is obtained by using test method D2163 or other acceptable method. From the analysis (expressed in liquid volume percent) the  Relative Density at 15.6C (60F)  of the sample may be determined.   Steps :  a) Enter the Volume % of individual components of Gas.  Ensure total % of all the gases is 100. b) Read below in last cell -  Relative Density at 15.6C (60F)  of the sample. Relative Density @ 15.6 C of LPG Conversion of a compositional analysis from mole, gas volume or

The App is based on ASTM D2598 standard. This Apps covers, by compositional analysis, the approximate determination of Vapor pressure of commercial propane, special-duty propane, commercial propane/butane mixtures, and commercial butane as per ASTM D2598 - Standard Practice for Calculation of Certain Physical Properties of Liquefied pet roleum (LP) Gases from Compositional Analysis. Apps developed on other Petroleum Calculations - see here. The composition of sample of LPG is obtained by using test method D2163 or other acceptable method. From the analysis (expressed in liquid volume percent) the vapor pressure at 37.8 C of the sample may be determined.   Steps :  a) Enter the Volume % of individual components of Gas.  Ensure total % of all the gases is 100. b) Read below in last cell - Vapor pressure of the sample. Vapor pressure App - ASTM D2598 Conversion of a compositional analysis from mole, gas volume or weight basis to liquid volume can be obtained b

LPG Components C3 & C4 estimation from its RVP When LPG consist of n-Propane and n-Butane mainly with traces of ethane and pentane plus as impurities, LPG Vapour Pressure   kPa at 37.8 C can be used for estimation of C3 & C4 in it.   Depending upon the ambient temperature, there requires different percentages of C3 and C4 in LPG for proper efficient use in applications. Thus, following information empowers users more knowledge of C3 and C4 from LPG Vapour Pressure   kPa at 37.8 C . The LPG derived from natural gas consists mainly Propane and Butane with minor impurities of Ethane and pentane. Similar Apps on Petroleum Calculations developed by RJ Patel- see here. Following table data taken from ASTM D 2598 can be used for estimation of LPG Composition. Constants of vapour pressure given above are empirical values for calculation purpose. A trendline from above data, with assumption of approximate 1 % (Ethane + C5 & above) is derived as %   C

Estimation of C3 & C4 percentage in LPG When LPG consist of n-Propane and n-Butane mainly with traces of ethane and pentane plus as impurities, LPG density at 15C can be used for estimation of C3 & C4 in it.   Depending upon the ambient temperature, there requires different percentages of C3 and C4 in LPG for proper efficient use in applications. Thus, following information empowers users more knowledge of C3 and C4 from LPG density at 15C. The LPG derived from natural gas consists mainly Propane and Butane with minor impurities of Ethane and pentane. Similar Apps on Petroleum Calculations developed by RJ Patel- see here. Following table data taken from ASTM D 2598 can be used for estimation of LPG Composition. Constants of Densities given above are empirical values for calculation purpose. A trendline from above data, with assumption of approximate 1 % (Ethane + C5 & above) is derived as given in following table:  % in Vol. %   C3 = 759

- Patel's Density Conversion for Liquefied Petroleum Gas (LPG)  from observed temperature to 15 C without use of  ASTM Table.  (Density unit Kg/m3).   A separate post for the density unit Kg/L is given here.  An exact conversion in Android /iOS App is given at the end of this article. Following simple method help in easily converting LPG density to 15 deg C, without using ASTM Tables, and without help of calculators. It is very handy for field persons who are taking density for comparing parent density for Quality Control purpose.  LPG is transported in pipeline or marine tankers in cryogenic conditions and usually sample temperature is around 02 -15 deg C. Two different alternate simplified ways are prescribed here. User may find their own alternative. Option 1.     For LPG.  (Density range 5Xx  to 590  Sample Temperature range ----------. ) Simplified   Formula                           D 15  = d o  - ( 15  –  t o )  Where