Why choose ultrasonics?
Ultrasonics is a viable alternative technology to the time-tried turbine for custody-transfer applications in the oil and gas industry, and there are situations where this has to be preferred technology. Likewise there are situations where there is no pressing need to force a change from that established technology. In this article situations are outlined where ultrasonics makes immediate sense. The article ends with a debate on both technologies.
Some strengths of ultrasonics
No need for re-calibration, excellent long-term stability.Calibrated on full Reynolds range and various hydrocarbons.Accuracy remains the same over full Reynolds – unaffected by viscosity changes due to temperature.Same performance in bi-directional configuration.No moving parts, no maintenance.Viscosity-independent.
- The American Petroleum Institute (API) lists a comprehensive number of diagnostic capabilities for flowmeters.
- Ultrasonic flowmeters are now commonly used.
- Ultrasonic flowmeters offer significant advantages in certain applications.
Avert the dirt: Choose the right flowmeter to avoid the effects of fouling
By H Boxley, KROHNE ZA
Electricity+Control, April 2012 (pgs 28 - 29)