A recent webinar on the importance of calibrating Coriolis meters at operating conditions attracted interest from industry from around the world. The webinar highlighted the influence of elevated temperatures, pressures and viscosities on Coriolis meters and provided advice on the correct methodology for calibrating Coriolis meters for use at these conditions.
“Interest was really high,” says researcher, Chris Mills, who led the webinar. “It is clear that this was a topic that was very relevant to people’s work. There were discussions during the on issues such as Reynolds numbers and the way in which viscosity and errors are linked.”
“Elevated temperatures, pressures and viscosities always have some effect on Coriolis meters,” explains Chris. “These effects can be very significant and occur irrespective of which Coriolis meter you use. It is vital to understand this, as the temperature, pressure and viscosity of the oil that is measured from a reservoir can differ considerably from standard calibration laboratory conditions.”
“We also looked at why the ISO Standard 10790:2015 relating to Coriolis meters is not particularly helpful with respect to elevated conditions,” Chris adds. “As it stands, it doesn’t contain much useful information on the impact of pressure, temperature and viscosity. The standard needs to be updated to reflect the latest knowledge and thinking.”
Chris also highlighted the capabilities of the accredited elevated pressure and temperature liquid flow facility. This facility is used to investigate the performance of flow meters at elevated pressures and temperatures. It also allows for liquid flow calibrations to be completed at close to service conditions.
Many other calibration facilities are not able to match the combination of fluid viscosities, temperatures and pressures found in the field. The parameter that is most often matched is the fluid viscosity however, this doesn’t take into account the influence of the temperature and pressure variations that Chris highlighted.
The information in the webinar was partly derived from research funded by the Department for Business, Energy & Industrial Strategy (BEIS), which looked into pressure effects in Coriolis meters. It also drew on work done in this area as part of a Joint Industry Project (JIP).
The webinar programme is delivered live by consultants and researchers. It provides the opportunity for participants to remotely access information and training on a wide range of key flow metrology issues, all of which have a strong, practical industry focus. Opportunities exist to ask questions and debate topical points with the presenters. Over the past year, over 1,000 participants, drawn from over 50 countries, have taken part in the events.
25 October 2018