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Flow Nozzles

Flow Nozzles

For Topside Measurement

ISA 1932 and ASME Flow Nozzles are accurate devices for measuring the flow of high velocity, non-viscous fluids e.g. Steam and other high velocity gases. Flow Nozzles are particularly suitable for erosive fluids where the sharp edge of an orifice plate could quickly deteriorate.

Solartron ISA offer a range of Flow Nozzle designs including flanged, buttweld and insert types. All Flow Nozzle types are designed in accordance with ISO 5167 to suit various pipe-work configurations, overall length requirements, orientations and end connections. Lines sizes available range from 50mm up to 1000mm.

Flow Nozzle design can provide a key cost saving benefit, as the profile is virtually immune to any wear or erosion. Flow Nozzles are often regarded as “fit and forget” devices with very little maintenance and inspection required.

Solartron ISA offers Flow Nozzle designs to suit the needs of any pipe-work configuration, with different lengths, orientations and end connections available. We provide complete Engineering support from initial design and sizing concepts to manufactured final products.


  • Proven flow metering technology and robust design, supported by ISO 5167
  • Accurate flow metering of high velocity steam and gas
  • Flow Nozzle profile is inherently robust with no maintenance and inspection required

  • Specifications +

    • Hydrocarbon, Liquid & Gas Process
    • Steam Process
    • Erosive Fluids
    • High Velocity Process
    • Process Measurement

    Key Parameters
    • Proven Technology
    • Robust Design
    • ‘Fit and Forget’ Flow Metering
    • Suitability For Most Process Conditions

    Functional Specifications
    Line Size DN50 (1") to DN1000 (40") Larger lines sizes available on request
    Pressure Ratings Ranging from ANSI 150# to API 15K PSI
    Types of Flow Nozzles Flanged, Butt-Weld, Hub, Insert, further connections are available on request
    Types of Tappings Flanged / NPT / Socket Weld / Thread O’let / Socket O’let, further types are available on request
    Beta Ratio 0.2 to 0.8 (Nozzle Type Dependant)
    Reynolds Number Ranging from 104 ≤ 107

    Accuracy Typically ±3% un-calibrated, ±1% calibrated
    NDT Testing Hydro-testing, Dye Penetrant, Radiography
    Additional options: Magnetic Particle, PMI, Gas and Water Calibrations, further testing is available on request
    Flow Turndown Typically >10:1, depending on Transmitter configuration
    Flow Nozzle Material Carbon Steel, Low Temperature Carbon Steel, Stainless Steel, Chrome Moly Steel, Duplex, Super Duplex, 6 Mo, Aluminum
    Further materials are available on request

  • Downloads +

  • Guidelines +

    Flowstream Flow Nozzles
  • DP Flow Questionnaire +