Emerson Exchange 365

Hello Faiz, there are a couple things that may affect our recommendation, but our standard recommendation for liquid flow in a horizontal line is for the tubes to be "down". A couple of comments:

1) If the fluid has some viscosity (i.e. heavy or cool), it will hold the BS&W in suspension with very little settling or build-up expected.

2) If the velocity can be maintained above about 1 m/sec, it has a self-cleaning effect whereby the moving fluid carrying particles will naturally scrape away any sediment that may have collected or adhered to the pipe surfaces.

3) If sediment does settle out into the sensor tubes, the density measurement will be reflective of the combined sediment plus liquid (i.e. it will appear heavier than just the liquid portion), and the zero will be affected due to the imbalance of material between the two tubes, but the mass flow rate should still be an accurate reflection of the mass that is moving through the meter.

4) Alternatively, allowing any bubbles to collect in a tubes-up orientation (i.e. light oil, low viscosity, hot) will cause significant measurement errors in the density AND the measured flow rates due to the decoupling effect of two-phase conditions.

If you would like a more thorough review of your specific conditions, please send an email to flow.support@emerson.com with your fluid properties, flow rates, pressure, temperature, and installation details (separator type (2 or 3 phase), level control (snap or modulating), sketch of piping up and downstream of metering point with all equipment identified). Thanks for escalating your concern.