Target flow meter upstream downstream lengths

1. Flowmeter is generally installed in a horizontal position.
2. 1, 2, and 3 are respectively the front, behind and by-pass valves and 4 is the flow meter. L≥10D and L>=5D are respectively front and behind pipelines whose lengths are larger than 10 and 5 times of the pipe diameter respectively.
3. Minimum pipe length (diameters): upstream lengths Before meter 10; downstream lengths after meter 5.