Emerson Rosemount 3410 Series Installation Manual page 28

Mechanical installation
October 2023
Flow conditioning is recommended for best measurement results
• Honed or un-honed meter tube(s)
• Flow direction (unidirectional or bidirectional)
• Correct meter size selection - too low may cause poor flow stability (thermal convection
or too fast may cause erosion problems and resonance, cracks or failure of probes or
thermowells (approximately 0.3 to 30 m/sec or 1 to 100 ft/sec).
• Space availability for meter lengths (to allow inlet piping customization)
• Concentric alignment pins or flange concentricity technique considerations
Important
The bore of the mating piping should be within one percent of the meter inside diameter.
Figure 2-7: Piping recommendations uni-directional without flow conditioner
Figure 2-8: Piping recommendations uni-directional with flow conditioner
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Installation manual
00825-0600-3104
Gas Ultrasonic Flow Meters