Accurate Custody Transfer

Positive Displacement flowmeters have been the original workhorses for accurate custody transfer measurement since the late 1930s.

PD flowmeters have proven reliability due to direct non-inferential measurement of true volume flow. Inferential technologies like Coriolis, Turbine and Ultrasonic infer volume flow from the errors of primary variables and hence are inaccurate.

Fluidyne’s oscillating piston technology offers custody transfer measurement upto 1700 litres per minute and are the preferred choice for applications such as

  • Bunkering flowmeter
  • Barge unloading system
  • Tanker decanting unit
  • Tanker Loading
  • Pipeline flow measurement

Core Information

  • Flowmeter – The Measurement Core

    • Patented oscillating piston flow technology for precise custody transfer measurement
    • No straight runs of pipe necessary
    • Single rotor design in PEEK engineering plastic
    • Low pressure loss. No metal-to-metal contact
    • Accuracy – Better than +-0.1% and repeatability better than +-0.02%

  • Air Eliminator and Strainer

    • High-capacity air eliminator for 100% vapor elimination, which is mandatory for custody transfer measurement
    • Scrubber included
    • Internal strainer 100 micron mesh
    • Materials – WCB, CF3M cast options

  • Transmitter/Flow computer

    • Measurement of flow and totalizer
    • Custody transfer measurement mode (K Factor masking)
    • IECEx and ATEX approved
    • Pulse, Modbus, 4-20 mA, HART output options
    • Clear readable display with backlight

  • Temperature and Pressure Sensors

    • Real-time temperature compensation
    • Pressure measurement for empty pipe detection

With Fluidyne custody transfer measurement solution, your benefits are

  • Save every penny with direct volume output!
  • Wide viscosity range upto 200,000 cps
  • Standard electronic outputs
  • Compact design
  • Low maintenance
  • Easy field calibration and master meter-based adjustment
  • Custody transfer measurement mode with sealing provision
  • Explosion-proof certified
  • Product agnostic
  • High capacity float-operated strainer cum air eliminators
  • Fluidyne-make Batch controller option
  • Standard outputs like Pulse, Modbus, HART
  • OIML certification( in progress)

Applications

Tanker Decanting Units

  • Fuel

  • Acids and alkalis
  • Edible Oils
  • Aromatics
  • Chemical custody transfer measurement

Barge Unloading Systems

  • Intermediates
  • Petroleum product custody
    transfer measurement

Bunkering Flowmeters

  • Crude Oil custody
    transfer measurement
  • Petroleum products
  • Paraffins

Pipeline Flow Measurement

  • Low flow high pressure dosing
  • Drilling fluids
  • Additive injection

Related Product

Series 7100

Series 7100 – Tanker Decanting Systems

Series 6730

Series 6730 – Preset Batching Systems

FAQs

What is custody transfer measurement?

Custody transfer measurement is measurement of commercial fluid handover from one party to another involving financial transactions. The process is used where large volumes of hydrocarbons, chemicals or gases are exchanged in industries such as oil and gas, petrochemicals, marine and pipeline transportation.

Custody transfer demands high accuracy, repeatability and reliable measurement and in compliance with legal and metrological standards. Since large volume of fluids are transferred, every litre of fluid has to be measured with precision as it has a direct impact on price of ownership.

Fluidyne offers high precision oscillating piston flowmeters which are the main elements of custody transfer measurement. With accuracies of better than ±0.1% of reading,they are the industry standard of measurement in challenging applications.
Fluidyne also offers strainers, air eliminator, batch controllers and on-off valves to provide a complete custody transfer solution.

Custody transfer is a process used in the oil and gas, petrochemicals and fluid transportation industries. Examples of custody transfer are 

  • Bunkering – Fuel deliveries from barges to ships
  • Tanker decanting into storage tanks
  • Pipeline delivery
  • LPG or LNG terminal unloading
  • Chemical plant receiving raw material

Yes Fluidyne’s equipment are certified by Legal Metrology and also has the custody transfer mode in which calibration factors are protected against tampering.

Certifications for custody transfer ensure that measurement equipment and processes are legally compliant, traceable, and accurate enough for commercial transactions. These certifications are typically governed by international metrology standards and regional legal-for-trade regulations.

  • Use of high repeatability (better than ±0.1%)  oscillating piston type positive displacement flowmeter
  • Linearization techniques within the flowmeter calibration
  • Use of Fluidyne-manufactured air eliminators to prevent two-phase flow
  • Precision pulse generation mechanism
  • Accurate flow computer – Fluidyne batch controller