API MPMS 11.3.2.1 pdf download Manual of Petroleum Measurement Standards Chapter 11.3.2.1 Ethylene Density 1scope This standard identifies an equation of state (EOS) suitable for use in custody transfer measurement of pure ethylene(>99 %) in the gaseous, liquid, and super critical phases. Given flowing temperature and pressure, an EOS is capableof calculating density and other thermodynamic properties used to caiculate...