segmental orifice

... taps:in the corners or at the flange Reynolds number in pipework:104 ≤ ReD ≤ 106 Pipe interior diameter:50 mm ≤ D ≤ 500 mm Orifice height:h ≥ 12,5 mm d/D:0.316 ≤ β ≤ 0.707 Upstream face roughness:Ra <10⁴.h Orifice thickness:0,005.D ≤ e ≤ 0,02.D Plate thickness:e ≤ E ≤ 0.05 D Downstream bevel angle if necessary:α = 45 ° ± 15 ° Flatness tolerance:t < 0,005.(D - h)/2...