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Coriolis master metering

2. European Flow Measurement Workshop 25 – 27 March 2014, Lisbon – Portugal

by

Aart Pruysen Approval Director Europe

Presentation Outline

•! Economical reasons to use Coriolis meter as reference •! Requirements for a master meter •! Different applications of Coriolis master metering

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Economical reasons to use Coriolis meter as master meter •! Costs of ownership for Coriolis master meter - Initial investment lower than conventional pipe or compact prover - Less maintenance (no moving parts) •! Arguments for users to own a Coriolis master meter: - availability at any moment (no planned proving) do not to need to synchronize the proving with operations - short payback time, depending of meter size: between 10 and 20 provings

Requirements for a master meter

•! Stability over time Internal investigation within Emerson Ede: approx. 120 meters shows < 0.03% shift during re-calibration on water after being in service (uncertainty calibration facility is 0.030% or 0.017%)

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Requirements for a master meter •! Stability over time Verify the stability of master meter on water (= smallest uncertainty); easy to achieve worldwide

Requirements for a master meter

•! Repeatability requirements of API chapter 4.5 - API has accepted electronic meters (USM and

Coriolis) in chapter 4.5 as master meter since 2011 - API allows an uncertainty of 0.029% due to repeatability (repeatability = max – min) - Uncertainty 0.029% coming from “old” repeatability requirement of 0.05% for 5 runs

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Requirements for a master meter •! Repeatability requirements of API chapter 4.5 Conversion from API repeatability (max-min) to uncertainty:

Requirements for a master meter •! Repeatability requirements of API chapter 4.5 Conversion from API repeatability (max-min) to uncertainty:

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Requirements for a master meter •! Repeatability requirements of API chapter 4.5 Results of a 2” Micro Motion Coriolis meter on water at Emerson – Ede - NL

Meet API chapter 4.5 for 5 repeats within a range of 20:1 in relation to nominal flow rate of involved sensor (no additional repeats needed)

Requirements for a master meter •! Repeatability requirements of API chapter 4.5 Results of a 2” Micro Motion Coriolis meter on hydrocarbons at NEL - East Kilbride - UK

Meet API chapter 4.5 for 5 repeats within a range of 20:1 in relation to nominal flow rate of involved sensor (no additional repeats needed)

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Requirements for a master meter •! Repeatability requirements of API chapter 4.5 Position of Micro Motion: Comply with API chapter 4.5 for a rangeability of 10:1 in relation to nominal flow rate of involved sensor

Requirements for a master meter •! Performance at field conditions to be known: - Uncertainty analysis from water calibration to field conditions, based on GUM and ISO 5168 - If uncertainty from analysis is not acceptable, calibrate the meter once at the required process conditions (NEL; SPSE; Euroloop; Trapil)

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Requirements for a master meter •! Performance at field conditions to be known: Uncertainty analysis from water calibration to field conditions, based on GUM and ISO 5168, is fully developed over the years Sample for -10 till 50 !C ; till 20 bar ; till 5 cSt Water calibration within 0.05% for mass and 0.2 kg/m3 for density

Requirements for a master meter •! Performance at field conditions to be known: Measures to improve the analysis: - Calibrate with 0.017% uncertainty - Correct for the mass and density errors, as observed during water calibration - Do not allow more than 50% of zero stability specification at water cal and in field - Determine the temperature coefficients for mass and density - Insulate the meter - Temperature correction based on external temperature (Micro Motion offers this feature by default)

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Requirements for a master meter •!Performance at field conditions to be known: Improved analysis with measures:

Requirements for a master meter •! Effect of varying process conditions to be known: Calibrate master meter at process conditions: NEL up till 4” meters insulated or non-insulated : 0.03% in mass and volume

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Requirements for a master meter •! Effect of varying process conditions to be known: Calibrate master meter at process conditions: SPSE (and Euroloop?) from 4” and higher : 0.10% for volume and 0.12 % for mass

•! All known process effects to be corrected for in “proving computer”

15 m3 prover !

Requirements for a master meter Conclusion: Coriolis meters meet the industry requirements for mass; density and volume Best performance is between 20% and 100% of nominal flowrate Qnom (Qnom = 1 bar pressure drop) Optional: Uncertainty claim of master meter to be validated by third party , e.g. “VSL: CMC certified”

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Different applications of Coriolis master meter •! Most common application: Example Proving of 8 “ duty meter with 8” master meter in field

Different applications of Coriolis master meter •! Most common application: Mass Proving in field of duty meter acc. agreed procedures (traceability important)

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Different applications of Coriolis master meter •! Most common application: Density proving in field of duty meter

Different applications of Coriolis master meter •! Stability verification on site with water (increase availability):

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Different applications of Coriolis master meter •! Stability verification with water by a “third party” UUT meters: mass or volume with pulse or mA output 4 master meters UUT section

4.4 uA input uncertainty in mA is 0.275 % uncertainty in flow at 10% flow

Different applications of Coriolis master meter •! Stability verification in field under field conditions Two meters parallel or in series

To avoid common causes: verify zero offset and density

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Different applications of Coriolis master meter 4” Coriolis master meter to verify each of the two installed 4” duty meters on LNG ship loading terminal (-163 !") ; Master meter to be re-calibrated on water per 3 years

Approved by local Norwegian Weights and Measures, Justersevenet Master meter Duty meters

Different applications of Coriolis master meter •! Very special: calibrate the big weighing scale (30 ton) in the Emerson Ede water calibration facility with a Micro Motion 3” meter

3” Coriolis meter

3000 kg scale 30000 kg scale

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Different applications of Coriolis master meter •! Very special: calibrate the big weighing scale (30 ton) Micro Motion 3” meter calibrated against 3000 kg scale at a fixed flowrate (2000 kg/min), before and after •! 3000 kg scale calibrated with weights, before and after within one month (reduce stability to max 0.006% of 3000 kg scale) •! Uncertainty of set-up (CMC; Calibration and Measurement Capability) in this special case is 0.0086%:

Different applications of Coriolis master meter •! Very special: calibrate the big weighing scale (30 ton) Validated by VSL, by issuing a scale certificate:

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Summary

•! Coriolis master meters comply with industry needs, for mass, density and volume

•! Cost effective with a best performance between 20 and 100% of Qnom

•! Uncertainty claim from third party (such as VSL-CMC certified ) supports Coriolis master meter

acceptance •! The future looks good for Coriolis master meters