Dimensions are minimums; any combination of UL1 & UL2 longer than listed is acceptable. For more information or to discuss meter run lengths, please contact CPA!

CPA 50E/55E/65E Ultrasonic Flow Meter Installations, Gas or Liquid

  • Canada Pipeline Accessories’ minimum general recommended meter run length is 10 internal pipe diameters when using the CPA 50E, 55E and 65E in ultrasonic applications.
  • For UL1, CPA recommends a minimum of 5 internal diameters of uninterrupted straight pipe as measured from the upstream face (inlet) of the flow conditioner.
  • For UL2, CPA recommends a minimum of 5 internal diameters of uninterrupted straight pipe from the downstream face (outlet) of the flow conditioner to the upstream flange of the ultrasonic meter.

CPA TBR/50E/55E AGA3‐2000/ISO‐5167 Custody Transfer Orifice Installations, Gas or Liquid

  • For all AGA3‐2000/ISO‐5167 custody transfer orifice measurement applications, CPA recommends a minimum meter run length of 13D or 17D for the CPA TBR/50E and 13D for the CPA 55E.
  • For 13D installations, a minimum UL1 upstream length of 5 internal diameters and a minimum UL2 downstream length of 8 internal diameters is required.
  • For 17D installations, any combination of UL1 and UL2 is acceptable as long as UL2 is a minimum of 8 internal pipe diameters, and the total overall meter run length is at least 17 internal diameters.
  • UL1 is measured from the last disturbance to the upstream face of the flow conditioner.
  • UL2 is measured from the outlet of the flow conditioner to the upstream face of the orifice plate.
  • This is independent of fluid type and is recommended for all gas or liquid applications.

CPA 65E Gas/Liquid Flow Meter General Installations

  • Canada Pipeline Accessories’ minimum recommended meter run length is 10 internal pipe diameters.
  • This is applicable to all flow meters (turbine, ultrasonic, vortex, annubar, venturi) as these distances were determined independently of any specific meter type.
  • For UL1, CPA recommends a minimum of 5 internal diameters of uninterrupted straight pipe as measured from the upstream face (inlet) of the flow conditioner.
  • For UL2, CPA recommends a minimum of 5 internal diameters of uninterrupted straight pipe from the downstream face (outlet) of the flow conditioner to the flow meter in question.
  • For turbine, ultrasonic or any other flanged meters, UL2 is measured to the flange connection at the flow meter inlet.
  • For venturi meters, UL2 is measured to venturi inlet or upstream tap (a venturi calibration is recommended to maximize performance of the flow meter).
  • The 65E is not recommended for AGA3 orifice applications!

CPA 55E Gas/Liquid Flow Meter General Installations

  • Canada Pipeline Accessories’ minimum recommended meter run length is 10 internal pipe diameters.
  • This is applicable to all flow meters (turbine, vortex, annubar, venturi, non‐custody transfer orifice) as these distances were determined independently of any specific meter type.
  • For UL1, CPA recommends a minimum of 5 internal diameters of uninterrupted straight pipe as measured from the upstream face (inlet) of the flow conditioner.
  • For UL2, CPA recommends a minimum of 5 internal diameters of uninterrupted straight pipe from the downstream face (outlet) of the flow conditioner to the flow meter in question.
  • For orifice meters, UL2 is measured to the upstream face of the orifice plate.
  • For turbine, ultrasonic or any other flanged meters, UL2 is measured to the flange connection at the flow meter inlet.
  • For venturi meters, UL2 is measured to venturi inlet or upstream tap (a venturi calibration is recommended to maximize performance of the flow meter).

CPA 50E Gas/Liquid Flow Meter General Installation

  • Canada Pipeline Accessories’ minimum recommended meter run length is 10 internal pipe diameters.
  • This is applicable to all flow meters (turbine, vortex, annubar, venturi, non‐custody transfer orifice) as these distances were determined independently of any specific meter type.
  • For UL1, CPA recommends a minimum of 5 internal diameters of uninterrupted straight pipe as measured from the upstream face (inlet) of the flow conditioner.
  • For UL2, CPA recommends a minimum of 5 internal diameters of uninterrupted straight pipe from the downstream face (outlet) of the flow conditioner to the flow meter in question.
  • For orifice meters, UL2 is measured to the upstream face of the orifice plate.
  • For turbine, ultrasonic or any other flanged meters, UL2 is measured to the flange connection at the flow meter inlet.
  • For venturi meters, UL2 is measured to venturi inlet or upstream tap (a venturi calibration is recommended to maximize performance of the flow meter).

For further information, do not hesitate to contact our experienced sales representatives, who will be able to help you choose the correct product for your specific needs.


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