Problems with the installation of vortex flowmeters
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Dear sea friends, as shown in the picture, can a vortex flow meter actually be installed with an expanded diameter at the flow meter location? It’s the first time I’ve seen it, and also the first time I’ve heard of it. Can it be measured accurately this way? Doesn’t a vortex flow meter require an increased Reynolds number to achieve accurate measurements? The medium is air, huh. Everyone, let’s discuss it!
There’s no problem at all. If it is due to equipment expansion while reusing the existing pipelines, and the flow rate under the new process exceeds the limit of the flow meter installed on the pipelines of the same diameter, it is entirely possible to purchase a flow meter with a larger diameter and, to ensure accurate measurement, to expand the diameter of the pipeline at the location where the flow meter is installed. I feel that the original poster has understood some theoretical aspects of mechanical dogma.
It is possible to increase or decrease the diameter, but one thing to keep in mind is the requirements regarding the straight sections before and after, as well as the location from which pressure readings are taken. The original poster is very diligent; this is exactly how one should approach learning – by asking more questions to identify more issues, and solving those issues is part of the process of improvement and accumulation of knowledge.
Could you please give a general overview of the requirements for straight pipe sections and what needs to be considered regarding the location where pressure samples are taken?
The pipe size chosen in the design is already within the acceptable flow velocity range; if the pipe is expanded, the flow velocity in that section will be even lower – how can accurate measurements then be ensured? This pipeline is not a reuse of existing ones!
Different flowmeters have different requirements for the straight pipe sections before and after them.
Bro, this is a vortex flow meter; it doesn’t require a pressure sensor, right?
I’m not an instrumentation expert, but I know that vortex flowmeters also require pressure and temperature sensors in order to be calibrated.
20D in the front and 5D behind; D represents the nominal diameter size. Pressure first, then temperature; as for whether it’s on the downstream or upstream side, I leave that to you, and as for why, you need to look into it.
The vortex flow meter is a velocity-type flow meter; as long as the flow velocity meets the requirements and the straight pipe section is of appropriate length, there are no issues with measurement using this method.