Petroleum Measurement Tables (ASTM D 1250) are a set of standardized tables that provide conversion factors for various physical properties of petroleum products, such as density, volume, temperature, pressure, and viscosity. These tables are widely used in the oil and gas industry to measure and calculate the quantity and quality of crude oil, refined products, and natural gas liquids.
In this article, we will explain what Petroleum Measurement Tables are, how they are derived, and how to use them correctly. We will also provide you with a link to download the PDF version of the tables for your convenience.
Petroleum Measurement Tables are based on the ASTM D 1250 standard, which was first published in 1948 by the American Society for Testing and Materials (ASTM). The standard was developed to provide a uniform and consistent method of converting physical properties of petroleum products from one unit system to another.
The tables cover a wide range of petroleum products, such as crude oil, gasoline, diesel, jet fuel, kerosene, lubricating oil, asphalt, and liquefied petroleum gas (LPG). The tables also include correction factors for the effects of temperature and pressure on the volume and density of petroleum products.
The tables are divided into six volumes, each covering a different product group and unit system. The volumes are:
You can download the PDF version of the Petroleum Measurement Tables from the ASTM website here.
Petroleum Measurement Tables are derived from empirical data obtained from laboratory experiments and field measurements. The data are then fitted into mathematical equations that describe the relationship between physical properties and unit systems. The equations are then used to generate the tables that provide conversion factors for various combinations of physical properties and unit systems.
The equations used to derive the tables are based on several assumptions and simplifications, such as:
These assumptions and simplifications may not always hold true in real situations, especially for complex mixtures or non-ideal fluids. Therefore, the tables may not provide accurate conversion factors for all cases. The tables should be used with caution and only as a guide. The users should always verify the results with actual measurements or alternative methods whenever possible.
To use Petroleum Measurement Tables correctly, you need to follow these steps:
Here is an example of how to use Petroleum Measurement Tables to convert the volume and density of crude oil from metric units to U.S. customary units:
Physical Property | Unit System | Observed Value | Correction Factor | Converted Value |
---|---|---|---|---|
Density | Metric | 850 kg/m3 | 0.9995 (Table 24A or Table 54A) | 32.1 API |
Volume | Metric | 1000 m3 | 6.290 (Table 24A or Table 54A) | 6290 bbl |
Note that the correction factors may vary slightly depending on which table you use. For example, the correction factor for density at 15°C in Table 24A is 0.9995, while the correction factor for density at 60°F in Table 54A is 0.9996. The difference is due to rounding errors and interpolation methods. You should use the table that matches your unit system and product group as closely as possible.
Petroleum Measurement Tables are a useful tool for converting physical properties of petroleum products from one unit system to another. They are based on the ASTM D 1250 standard, which provides a uniform and consistent method of conversion. However, they are not perfect and may not provide accurate results for all cases. You should always verify the results with actual measurements or alternative methods whenever possible.
If you want to learn more about Petroleum Measurement Tables, you can download the PDF version from the ASTM website here. You can also contact us if you have any questions or need any assistance with your oil and gas calculations.
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