Calibration of orifice flowmeter | Debugging method of orifice flowmeter

『Calibration of orifice flowmeter』Related information(clamp on meter|electromagnetic meter|venturi meterrotameter|orifice meter|ultrasonic flow meter|mass flow meter|coriolis mass flow meter|coriolis flow meter|magnetic flow meter|magmeter flow meter|magflow flow meter|mag meter flow meter|electromagnetic flow meter|vortex flow meter|turbine flow meter|thermal mass flow meter|thermal flow meter|rotameter flow meter)

1. Plug in online density meter

2. Debugging method of orifice plate flowmeter

1. Connect the signal line and power line

2. Open the inlet and outlet valves, and the opening of the inlet and outlet valves should be consistent

3. Open the stainless steel three valve group balance valve, slowly open the valves at the high and low pressure ends of the orifice plate, and close the stainless steel three valve group balance valve after the fluid passes through the flowmeter. Installation pipeline conditions for orifice flowmeter: (1) The straight pipe section before and after the throttling element must be straight and there must be no visible bending. (2) The straight pipe section used for installing throttling components should be smooth. If it is not smooth, the flow coefficient should be multiplied by roughness to correct sparsity. (3) To ensure that the fluid flow forms a fully developed turbulent velocity distribution in front of the throttling element 1D, and to make this distribution uniformly axisymmetric, the straight pipe section must be circular, and the roundness requirements for the 2D range in front of the throttling element are very strict, with certain roundness indicators. Specific measurement method: (A) On the OD, D/2, D, and 2D vertical pipe sections in front of the throttling element, at least four single inner diameter measurements of the pipeline should be measured at equal angular distances, and the average value D should be taken. The difference between any single inner diameter measurement value and the average value should not exceed ± 0.3%. (B) After the throttling element, eight single inner diameter measurements should be measured at the OD and 2D positions u

(4) The length of the straight pipe section between the first and second resistance members on the upstream side of the throttling element can be taken as 1/2 of the listed value in the form of the second resistance member and β=0.7 (regardless of the actual β value).

(5) When the upstream side of the throttling element is an open space or a large container with a diameter ≥ 2D, the length of the straight pipe between the open space or large container and the throttling element shall not be less than 30D (15D).

3. How to debug orifice flowmeter

The debugging of orifice flowmeter needs to be carried out according to the standard steps on the basis of meeting the installation requirements of the pipeline. The specific steps are as follows:

1. Pipeline installation requirements: The straight pipe section must be straight, and there should be no visible bending in the straight pipe section before and after the throttling element to ensure a stable fluid flow state.

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