TÜV SÜD Celebrates 1000th Densitometer Calibration

25 July 2023

1000th Densitometer Calibrations PresentationTÜV SÜD National Engineering Laboratory recently achieved a significant milestone by celebrating its 1000th calibration as the UK's only Densitometer Calibration Facility capable of undertaking calibrations in strict accordance with the UK North Sea Transition Authority (NSTA) Guidelines. Since launching its calibration service in 2012, TÜV SÜD has played a pivotal role in supporting the oil and gas industry as Dougie Griffin, Metering Manager at the NSTA, explains:

“The process of calibration of oil densitometers for use in fiscal measurement applications in the upstream oil & gas industry has been significantly improved thanks to TÜV SÜD’s facility. The ability to calibrate the devices on representative fluids, and at representative pressures and temperatures, has greatly reduced the potential for systematic installation effects, the financial consequences of which could be extremely significant in a period of ongoing high oil prices.”

Between 2005 and 2009, TÜV SÜD led a Joint Industry Project (JIP), ‘Traceable Calibration of Liquid Densitometers’. This project determined that the previous recalibration procedure of just adjusting the K0 and K2 coefficients based on data obtained at 20ºC and 1 bar was totally inadequate. As a result, the NSTA Guidelines now require calibration at anticipated operating conditions.

Dr Norman Glen, Consultant at TÜV SÜD, explains how this project led to the development of the densitometer calibration service:

“At the end of the JIP in 2009, we did not intend to launch a calibration service. The manufacturer of the most commonly-used type of densitometer in the UK upstream oil & gas sector had been a member of the JIP and were planning to have a new facility up and running by mid-2010 but it was much-delayed. In 2011, the NSTA approached TÜV SÜD to ask if, in the interim, we would calibrate ‘a few of the most important’ densitometers. We did, and the rest is history!”

Dr Norman Glen, Consultant, and John Hay, Engineer, were responsible for setting up the service and still manage it today. John said:

“We launched the Densitometer Calibration Service in 2012 and issued 30 calibration certificates in the first year. Neither of us expected that just over 11 years later, we would have issued our 1000th calibration certificate. The journey from the JIP to where we are today has been both interesting and challenging. This achievement reflects the dedication of all the individuals who have been in the team over that period in carrying out their roles, from developing the facility, customer-facing activities and to actually undertaking the calibrations. We also appreciate the loyalty of our customers - the first densitometer we calibrated still comes back to us regularly.”

Equipped with state-of-the-art technology, the Densitometer Calibration Facility at TÜV SÜD can calibrate densitometers at temperatures ranging from 5 to 100ºC and pressures from 3 to 141 bar. Depending on the temperatures and pressures, the reference fluids’ densities range from 625 to 1005 kg.m-3, with an uncertainty of 0.02% (k=2).

Find out more about our densitometer calibration facility and explore our range of flow measurement services.

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