Asphalt, use the tables in ASTM D 4311. Natural Gasolines, are paraffinic substances and are not actually refined products. Therefore, use Table 6A. Drip Gasoline, is the paraffinic condensate from gas well production. It consists primarily of mixed natural gas liquids such as butanes, pentanes, hexanes and heptanes. Use Table 6B. LPG, NLG, etc. These fluids are calculated using API MPMS Chapter 11.2.4. Tables 23E, 24E, 53E, 59E, & 60E JP 4: This is a blended material that is used almost exclusively by the military. Studies have shown that JP 4 is more accurately represented by the crude tables; therefore, use Table 6A. M.T.B.E., (Methyl tert -Butyl Ether) has its own volume correction factor table which is an addendum to Table 6C and 54C and is applicable to commercially available mixtures containing at least 85% MTBE, by weight. Petrochemicals, most of the materials classified as petrochemicals are not specifically addressed by the new tables. Many petrochemicals also have their own specific volume correction factor tables, developed by the manufacturer.
TABLE
Product
Standard temperature
Table entry at observed temp. Plus…
6A 6B 6C 6D
Generalised Crude Oil Generalised Products
60 ° F 60 ° F 60 ° F 60 ° F 60 ° F 60 ° F 60 ° F 15 ° C 15 ° C 15 ° C 15 ° C 60 ° F 15 ° C
API Gravity at 60 ° F API Gravity at 60 ° F
Individual and Special Applications
Thermal Expansion Coefficient
Generalised Lubricating Oil
API Gravity at 60 ° F
24A 24B 24C 54A 54B 54C 54D
Generalised Crude Oil Generalised Products
Relative Density at 60/60 ° F Relative Density at 60/60 ° F Thermal Expansion Coefficient
Individual and Special Applications
Generalised Crude Oil Generalised Products
Density at 15 ° C Density at 15 ° C
Individual and Special Applications
Thermal Expansion Coefficient
Generalised Lubricating Oil Asphalt to 60 ° F (Table 1) Asphalt to 15 ° C (Table 2)
Density at 15 ° C
ASTM D4311
API Gravity at 60 ° F
Density at 15 ° C
Volume correction factors can be obtained from tables, or they can be computer generated. As these two different methods sometimes produce a slightly different result, a question that is frequently asked is, "what is the actual VCF standard". The VCF standard is the computer implementation procedure and therefore, if a difference between a computer generated VCF and the printed table occurs, the computer generated VCF should take preference. This is assuming that the computer was programmed correctly.
These individual tables have their own parameters and table entry requirements; however, their application is the same. Table 6C, 24C, or 54C can be used for petrochemicals and any other product, if the precise thermal expansion coefficients are known. A minimum of 10 data points is recommended when determining these coefficients. The use of these tables should be by mutual agreement of all parties concerned.
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