There is a problem with flow measurement
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Today, we replaced valves on the natural gas pipeline and installed new valves on the converter gas pipeline. First and foremost, the gas supply to both the natural gas pipelines and the converter gas pipelines has been completely cut off. Due to the need to install a valve, the construction workers removed the pipe with the flow meter and then reinstalled it as before. Now here’s the problem: the two flow meters, which should have shown zero flow rate, now show values fluctuating around 60 on the natural gas pipeline (it seems to be a vortex flow meter), while the flow rate on the converter coal gas pipeline remains constant at 80 (it’s a V-cone flow meter). What’s the problem, please? I appreciate your advice.
For reinstallation, first check whether the straight sections before and after the vortex flow meter meet the requirements, whether there is any vibration in the pipeline, if there is any electromagnetic interference in the surrounding area, and what the measurement range of the flow meter is. Flow rates with low signals tend to exhibit large fluctuations; therefore, a function for filtering out such low signals is available in the accumulator.