4 Basics – flow measurement
PIOX S72* 4.4 Undisturbed flow profile
19
UMPIOX_S72xV1-9EN, 2022-05-15
Tab. 4.1: Recommended distance from disturbances
D – nominal pipe diameter at the measuring point
l – recommended distance between disturbance and transducer position
disturbance: 90° elbow
inlet: l ≥ 10 D
(l ≥ 2 D with disturbance correction)
outlet: l ≥ 3D
disturbance: double elbow
inlet: l ≥ 10 D
(l ≥ 2 D with disturbance correction)
outlet: l ≥ 3D
disturbance: double elbow out of plane (with elbow distance l
2
≥ 3 D)
inlet: l ≥ 10 D
(l ≥ 2 D with disturbance correction)
outlet: l ≥ 3D
disturbance: double elbow out of plane (directly coupled)
inlet: l ≥ 40 D
(l ≥ 2 D with disturbance correction)
outlet: l ≥ 3D
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