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Title: Euroloop: Unique Oil And Gas Calibration Facilities
Author: Wim Volmer
Source: 2008 South East Asia Flow Measurement Conference
Year Published: 2008
Abstract: NMi is building two calibration facilities, one for Natural Gas and one for liquid Oil and Oil products. Both facilities are unique in the world when it comes to their combination of flow-, viscosity ranges and measurement uncertainties. Services provided will cover ranges that significantly surpass the current capabilities of available traceable Measurement Standards. As such these impartial, independent and accessible facilities will provide a wide range of opportunities for traceable calibration, Research & Development and hands-on training for the entire Hydrocarbon sector and all those related to it. In this paper and in the presentation NMi intends to outline how international traceability will be provided for liquid flows ranging from 10 to 5,000 m3/h, line sizes from 4 to 24 over viscosities up to 100 cSt. Using two intelligent, roughly 40 m long, bi-directional Piston Provers, the overall measurement uncertainty will typically be 0.05%, not exceeding 0.07%, for the whole set of ranges stated above. For Natural Gas, the flow ranges will be from 5 to 30,000 m3/h at operating pressure, 1,800,000 m3/h at standard conditions, pressures from 1 to 65 bar, line sizes from 2 to 30 and an overall measurement uncertainty better than 0.20% for all these conditions. The system is designed to facilitate R&D, calibrations and activities under legal metrological control, such as Type Approval, Initial Verification and such. Therefore the facilties design is partly derived from requirements in OIML Recommendations R117-1 1 and R137-1 2 and some ISO Standards. Apart from the facilities design, there is also another relation between EuroLoop activities and legal requirements, being periodic re-calibration, which is also highlighted in this paper. Both paper and presentation focus particularly on the implications of legal metrological requirements on technical design aspects of the EuroLoop facilities.

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