: Many meters also measure liquid density and calculate volume flow based on these readings. Fluid Versatility
: In "buying and selling" scenarios (custody transfer), both parties need assurance that the volume or mass reported is correct. ASME MFC-11 provides the technical basis for this trust. asme mfc-11
( \Delta t \propto \dotm ) (Phase shift is proportional to mass flow rate) ( f \propto 1/\sqrt\rho ) (Frequency is inversely proportional to density) : Many meters also measure liquid density and
While Coriolis meters are largely insensitive to velocity profile, the standard does note that upstream pumps or partially closed valves can create pulsation. In such cases, MFC-11 suggests installing 10 diameters of straight pipe or a pulsation dampener. ( \Delta t \propto \dotm ) (Phase shift
ASME MFC-11 is a standard published by the American Society of Mechanical Engineers (ASME) under its Measurement of Fluid Flow in Closed Conduits (MFC) technical committee. First issued in 2000 and reaffirmed with revisions in 2016 (and currently under continuous maintenance), the standard addresses the unique characteristics of Coriolis meters that differentiate them from traditional volumetric devices (like orifice plates or turbine meters).
[ \frac\delta \dotm\dotm = \sqrt \left(\frac\delta \dotm cal\dotm\right)^2 + \left(\frac\delta \dotm zero\dotm\right)^2 + \left(\frac\delta \dotm rep\dotm\right)^2 + \left(\frac\delta \dotm temp\dotm\right)^2 + \left(\frac\delta \dotm_press\dotm\right)^2 ]