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Title: Custody Transfer Accuracy
of an 8-Path Ultrasonic
Flow Meter with 5D
Upstream Straight Run
Author: Nicholas J. Mollo
Source: 2018 North American Custody Transfer Measurement Conference
Year Published: 2018
Abstract: Calibration of ultrasonic flow meters for custody transfer service is
already a tricky business.
The need for compact metering skids used in offshore applications
where foot print is critical, and land based applications where cost is
important, require meter installations that can tolerate the reduced
straight inlet lengths.
Meters utilizing multiple, cross -plane, measurement paths to cancel
swirl effects is a common practice. Opposing tangential velocity
vectors are automatically subtracted from each other.
Is a long, straight pipe, calibration of such a flow meter sufficient to
provide custody transfer level accuracy in disturbed, short length