List of articles in Petroleum QC blog

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- Flash Point Prediction - Petroleum Products Blending - Calculation formula and table

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- Flash Point Prediction - Petroleum Products Blending - Calculation formula and table How to predict Flash point of resultant product after blending two stocks ?  or  how to get volume required of products to get desired  blended product Flash Point ? Many times flash point improvement is desired by blending higher flash petroleum product to lower Flash Point Product at Petroleum storage depots. List of all blog articles on Petroleum QC  by RJ Patel. Following table and formula can be used to predict the desirable variable figure of  volume of product or flash point.   In the table below against Flash Point Deg C some constant number " A " is listed in next column. Flash Point   C A Flash Point C A Flash Point  C A 20 3281 50 306 80 45 21 3004 51 285 81 43 22 2752 52 266 ...
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- Excel Formula-Density Conversion to 15 deg C, table ASTM 53 B - 1980,

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- Excel Formula-Density Conversion to 15 deg C,  table ASTM 53 B - 1980,    Excel sheet giving the Density 15 deg C figures from given observed Density and observed temperature for petroleum product as derived from ASTM tables 53 B. Density conversion to 15 deg C matches exactly with the ASTM conversion tables 1980. Lists of Android/iOs Apps developed on Petroleum Calculation - see here.      (These apps convert Density/API gravity exactly as per ASTM tables 5a, 5b, 6a, 6b, 23a,23b, 24a,24b, 53a,53b, 54a,54b to standard temperature 15 C,  20 C and 60 F.)   Example:  Observed density is 792 kg/Cu. M and observed temperature is 29 deg C. Corresponding 15 deg C for this set of data comes 802.2  kg/Cu. M Excel Worksheet - green color cells  observed density and observed sample temperature are variables and Red color digits are the answer - density at 15 deg C.  Apps developed on Petroleum Calculations - see here. ...
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Jet A-1 Density conversion to 15 C from observed temperature without ASTM tables

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Jet A-1 Density conversion to 15 C from observed temperature without ASTM tables  Globally Oil industry Quality Manuals specify certain tolerance density variation for petroleum products like Gasoline, Diesel fuels, Aviation fuels etc, between density of dispatched products and density of received product. As long as this density difference remains less than permitted variation, the product is accepted in the system. List of all blog articles on Petroleum QC  by RJ Patel. In India, for Aviation products, this quality control variation in density number is +/- 2.5 kg/m 3  against JIG specified variation +/- 3.0 kg/m 3 maximum. During Aviation products transfer from one place to another using Ocean tanker, pipeline, Rail T/Ws, Road Tank Truck etc. Density at 15 deg C is recorded at despatch and receipt end.  A simple way of converting observed density from ambient temperature to 15 deg C has been developed, without ASTM tables , using simple ...
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RVP Vs TVP of Gasoline

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Is Reid Vapor pressure of gasoline (RVP) is same as true vapor pressure (TVP) ? What is difference between RVP and TVP value ? The blog article explain difference between RVP and TVP at slight higher technical level than common man perspectives. List of all blog articles on Petroleum QC  by RJ Patel. Reid vapor pressure  is a common measure of the  volatility of gasoline . It is defined as the absolute  vapor pressure  exerted by a liquid at 37.8 °C (100 °F) as determined by the test method ASTM-D-323. The test method measures the vapor pressure of gasoline, volatile crude oil, and other volatile petroleum products, except for  liquefied petroleum gases . RVP is stated in kilopascals and represents a relative pressure to the atmospheric pressure because ASTM-D-323 measures the gauge pressure of the sample in a non-evacuated chamber. All values are in SI units and are regarded as standards. Imperial units are for informat...
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