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Title: Traceable Calibration Of Liquid Densitometers
Author: Norman Glen Douglas Griffin
Source: 2009 South East Asia Flow Measurement Conference
Year Published: 2009
Abstract: Density measurement is a key element of both mass and volume flowrate measurement in the oil industry and as such is fundamental to the commercial operation of facilities. The most widely implemented approach for mass flow measurement is to use a volumetric flowmeter and a densitometer. All flowmeters require periodic calibration traceability within the UK is provided through the National Flow Measurement Standards Facilities at TUV NEL, supported by the UK Department for Innovation, Universities and Skills (DIUS) under the Engineering and Flow Measurement Programme. All commercial densitometers also require periodic calibration and the UK regulator for petroleum measurement and allocation, part of the UKs Department of Energy and Climate Change (DECC) also identified a need for research into practical methods for in-situ calibration of densitometers, as well as a greater understanding of the effects on densitometer performance of variations in product density, pressure and temperature. This is particularly important as more and more operators are involved in smaller field developments tied back to other operators platforms, feeding third-party pipeline infrastructures. In addition, as more high-temperature, high-pressure fields come on stream, more densitometers will be operating at temperatures and pressures significantly different from those currently used as the reference conditions for calibration.

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