def vcf_table54_groupB(temp_c, density_obs_kgm3): """ Simplified volume correction factor (VCF) to 15°C. Based on typical expansion coefficients for middle distillates. """ # Approx cubic expansion coefficient per °C for Group B # Real ASTM uses complex polynomials per density/temp grid alpha = 0.00085 # 1/°C
If you have access to the official ASTM standard and need help: astm table 54
vcf = vcf_table54_groupB(observed_temp, observed_density) observed_volume = 1000.0 # m³ volume_at_15C = observed_volume * vcf The above is a conceptual example
While "Table 54" is the general term, the industry uses specific sub-tables depending on the type of cargo: astm table 54
⚠️ I cannot provide the actual tabulated numbers or official equations. The above is a conceptual example. You must license ASTM D1250 / API 11.1 for certified calculations.
Output: – multiplies observed volume → volume at 15°C.