Flow nozzle
The flow nozzle is used for high velocity flow measurement where erosion or cavitation could wear or damage an orifice plate. Overview Flow nozzles do not rely on a sharp edge (which can degrade over time) to maintain accuracy and therefore offer excellent long-term accuracy with less wear and reduced possibility of distortion. They are often used for flow testing on steam-raising plant. A flow nozzle can measure higher flow rates than an equivalent orifice plate at the same
The flow nozzle is used for high velocity flow measurement where erosion or cavitation could wear or damage an orifice plate.
Overview
A flow nozzle can measure higher flow rates than an equivalent orifice plate at the same design differential pressure. The flow nozzle is available to 3 standards and in designs for either clamping between flanges (within the bolt circle) or for welding into the pipe.
Data
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ISA 1932 nozzle
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Long radius nozzle
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ASME throat tap nozzle
Each design is slightly different and is covered by ISO5167:2003, with the exception of the ASME throat tap nozzle. The ASME nozzle can also be supplied in a pipe section to meet the requirements of ASME Performance Test Code 6 (PTC-6) for steam turbine testing.