API MPMS Chapter 11.1 · ASTM D1250-19
Vapor pressure of the liquid at observed temp. Use 0 for non-volatile crude/products.
Leave blank to compute factors only. If entered, GSV = GOV × CTPL.
Understand CTL/CPL/CTPL, the α60 thermal-expansion coefficients, and the gross-to-net custody-transfer volume chain
A VCF converts a measured (observed) liquid volume to its equivalent at base conditions (60 °F, 0 psig). It is the product of the temperature correction CTL and pressure correction CPL: VCF = CTPL = CTL × CPL, per API MPMS Ch. 11.1 / ASTM D1250.
CTL corrects for thermal expansion relative to 60 °F; CPL corrects for compressibility above equilibrium pressure; CTPL is their product and is the factor applied to the gross observed volume.
Crude Oils (K0=341.0957); Gasolines (K0=192.4571, K1=0.2438); Jet Fuels/Kerosines (K0=330.3010); Fuel Oils/Diesel (K0=103.8720, K1=0.2701); Lubricating Oils (K2=0.34878). LPG/NGL are outside Ch. 11.1 — use GPA TP-27.
For checks, training and verification — yes. Official tickets require certified MPMS software or a flow computer. This tool implements and validates the Ch. 11.1 / D1250 equations but is not a certified accounting system.