Tech Note 7 - Flow Conditioning Benefits
By John Lansing, RMG Americas...
AGA Report No. 9 (AGA 9) [Ref. #1] requires flow calibration for all fiscal applications to reduce the meter’s overall uncertainty. AGA 9 also discusses uncertainty requirements, due to field installation effects, a USM manufacturer must meet once the meter is installed. All USM manufacturers provide piping recommendations to comply with the AGA 9 field uncertainty budget of ±0.3%. Traditionally gas ultrasonic meters are flow calibrated with upstream piping spools that include a flow conditioner (FC). The initial reason for calibrating the USM is to reduce the meter’s uncertainty. But a second, and perhaps more important benefit, is to obtain baseline meter diagnostics information.
AGA Report No. 9 (AGA 9) [Ref. #1] requires flow calibration for all fiscal applications to reduce the meter’s overall uncertainty. AGA 9 also discusses uncertainty requirements, due to field installation effects, a USM manufacturer must meet once the meter is installed. All USM manufacturers provide piping recommendations to comply with the AGA 9 field uncertainty budget of ±0.3%. Traditionally gas ultrasonic meters are flow calibrated with upstream piping spools that include a flow conditioner (FC). The initial reason for calibrating the USM is to reduce the meter’s uncertainty. But a second, and perhaps more important benefit, is to obtain baseline meter diagnostics information.
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