API MPMS 12.3:1996 (R2011)

This standard provides a procedure to quantify the volume shrinkage that occurs when blending lighter hydrocarbons (580-890 kilograms per cubic meter, 112-27 degrees API) with crude oils (644-979 kilograms per cubic meter, 88-13 degrees API). Shrinkage factors are computed from the standard densities of the hydrocarbon and the crude oil (in either International System of Units [SI] or customary units) and the volume fraction of the hydrocarbon. The standard also recommends precautions when using the tables and provides guidance about the range of components it covers. The purpose of this standard is to provide a procedure to quantify the volume reduction that occurs when mixing hydrocarbons of different density or API gravity. The standard provides shrinkage factors related to inverse density (metric system) or gravity (customary system) differentials for blends of 0 to 100 percent light with heavy hydrocarbons. The tables are entered with density differentials of Standard conditions and percentage light hydrocarbon in total mix.