James Hensley June 21, 2017 FLOW MEASUREMENT VERIFYING YOUR VALUE Small Volume Provers Honeywell Internal
Today s Topics Fundamentals of meter proving - Definitions - Financial Impact - Traceability - Pulse Collection Meter proving techniques and characteristics - Tank Provers - Weigh Scale - Master Meter - Ball Provers - Uni-Directional Captive Displacement or Small Volume Provers 1 Honeywell Internal
Definition from MPMS 4.1.5 2 API All meters should be proved with the liquid to be measured and at operating flow(s) rate, pressure, and temperature. This means the preferred way of proving a flow meter is installed and under actual operational conditions. Honeywell Internal
General Considerations 3 API Definition from MPMS 4.1.5 All meters should be proved with the liquid to be measured and at operating flow(s) rate, pressure, and temperature. This means the preferred way of proving a flow meter is installed and under actual operational conditions.
What is Meter Proving 4 API Definition from MPMS 4.1.5 The purpose of proving a meter is to determine its meter factor, which is the number obtained by dividing the actual volume of liquid passed through a meter during proving by the registered volume by the meter. MFG Meter Factor X Actual Volume Passed thru Meter Volume Registered by Meter = New Meter Factor The purpose of a meter factor is to correct a meter s indicated volume. Obtaining a meter factor is an essential step in calculating the standard net volume of a receipt or delivery of petroleum liquids.
Accuracy and Repeatability 5
Repeatability and Reproducibility 6 Repeatability is the ability to obtain identical measurement results when a measurement is repeated under the same conditions several times in a row. Repeatability (%) = (Maximum Minimum) / Maximum * 100% Reproducibility is the ability to obtain identical measurement results when a measurement is preformed under the same conditions at a later date, by other people or at a different location.
Reasons for Meter Proving 7 A Prover is used for flow meter calibration to establish : A meter s meter factor (Actual volume divided by indicated volume) A meter s K - Factor (Pulses per unit volume) A meter s Linearity (Accuracy over the calibrated flow range) A meter s Repeatability (Repeatable information under same conditions)
Why do companies perform flow meter proving? 8 Flow measurement systems are the cash registers for all petroleum operations. What does it all mean? Simply stated. Errors in meter factors can and will generate enormous financial errors in a company s invoicing in a very short period of time!
Did you know? 20 hours of product transfer per day at 5000 BPH With product Price of $80.00 per BBL After one day uncertainty losses could be $13,600 After one month uncertainty losses could be $408,000 After one year uncertainty losses could be $4,896,000 Measurement uncertainty of 0.17%. Measurement uncertainty is verified to 0.02% prior to each transfer...providing Possibly $12,000 less uncertainty in one day Possibly $376,000 less uncertainty in one month $300,000 investment will get you there with a 30 day payback REAL operational VALUE
Did you know? 20 hours of product transfer per day at 5000 BPH With product Price of $80.00 per BBL After one day uncertainty losses could be $21,600 After one month uncertainty losses could be $648,000 After one year uncertainty losses could be $7,776,000 Measurement uncertainty of 0.27%. Measurement uncertainty is verified to 0.02% prior to each transfer...providing Possibly $20,000 less uncertainty in one day Possibly $616,000 less uncertainty in one month $300,000 investment will get you there with a 16 day payback REAL operational VALUE
Honeywell Small Volume Prover 11 Honeywell Internal
SVP Cutaway 12 Honeywell Internal 1200:1 Turndown Ratio
13 Summary Technique Advantages Disadvantage Prover Can Weigh Scale Master Meter Ball Prover SVP Inexpensive Accuracy Inexpensive Accuracy Unlimited volume Inexpensive Closed system High flow rate Work on most fluids Closed system Works on most fluids High turndown ratio Closed system Limited flow rate Unpractical External influence Unpractical Inaccurate Drift Range of products limited Large footprint Maintenance sensitive Expensive Expensive Complex