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Flow Measurement and Custody Transfer



Custody Transfer defines the point at which ownership changes hands for the process product being measured. This transfer is unique among flow-meter applications since money changes hands and accuracy requirements are higher than they are for most other applications. The custody transfer system must generate detailed and indisputable cargo reports, based on accurate flow measurements and calculations.

In this intensive and highly practical PetroKnowledge training course, participants will gain sound and practical understanding and extend their knowledge of Custody Transfer and Flow Measurement systems, principles and types, and how to assess their impact on the strategic and tactical aspirations of the company.

Course Objectives:

At the end of this course the participants will be able to:

  • Have a sound understanding of relevant fluid and gas Laws that are needed for the use of flow measurement devices
  • Understand the main requirements of custody transfer systems
  • Appreciate the main requirements of flow measurements including accuracy and repeatability
  • Be knowledgeable about up-to-date flow measurement meters including differential pressure (DP) measurement, turbine meters, positive displacement meters, Coriolis flow measurement, Magnetic, and ultrasonic flow measurement.
  • Gain the ability to determine if a metering system is adequate for the purpose, select appropriate custody transfer metering systems and identify potential problems
  • Learn about the principles and applications of Multiple meters/meter runs, Flow computers, Quality systems, Calibration, Meter Runs, Proving and Supporting Automation

Targeted Audience:

  • Engineers and Technicians of all disciplines
  • Instrumentation Personnel
  • Procurement and quality control personnel
  • Inspection and Maintenance engineers

Course Outlines:

Unit 1: Introduction – Basic Fluid and Gas Laws:

  • Custody Transfer principles and requirements
  • Pressure, Viscosity, Flow Volume, Continuity Principle, Energy Law (Bernoulli’s)
  • Flow Configurations (Flow Profiles), Laminar Flow, Turbulent Flow
  • Reynold’s Number, Flow Losses (Friction Losses)
  • Ideal and Real Gases, Gas Laws, Boyle's Law, Charles's Law, Gay-Lussac’s Law

Unit 2: General Characteristics and Performance of Flow Meters:

  • Competency Description: Understanding the fundamental concepts related to flow measurement including Accuracy, Precision, and Rangeability, etc.
  • System Characteristics and Flow range
  • Performance, Accuracy, Stability and Repeatability, Sensitivity, Noise, Linearity, Reliability
  • Flow modification and meter runs
  • Applications and Usage, Sizing
  • Temperature and Pressure Measurements

Unit 3: Types and Applications of Flow Meters:

  • Differential Pressure (DP) Flow Meters, Orifice, Venturi, Nozzles, Pitot tubes
  • Positive Displacement (PD) Flow Meters, Rotor, Oscillating Piston, Oval Gear
  • Turbine Flow Meters, Conventional and Helical
  • Problems with Erosion, corrosion, Cavitation, and Obstructions
  • Uses and Applications, Installation requirements and Standards

Unit 4: Types and Applications of Flow Meters (Continued):

  • Ultrasonic Flow Meters
  • Magnetic Flow Meters
  • Coriolis Flow Meters
  • Uses and Applications, Installation requirements and Standards
  • Straight run requirement

Unit 5: Flow Measurement Systems and Custody Transfer Considerations

  • Custody Transfer Requirements
  • Meter Factor
  • Proving Systems; Direct, Indirect, Master Meter, Volume, Displacement
  • Custody Transfer Skids
  • Flow Computers and Communication
  • Temperature and Pressure Measurements

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