Seeking guidance

Follow the technical requirements of the flow meter manufacturer

I need to reserve this length of straight pipe section; the manufacturer hasn’t started looking for it yet

I think we can first ask the manufacturer about the dimensions, so that the amount reserved will be just right, or we can reserve a bit more length

Consider at least 5D in front of and behind. . .

The top 10 and bottom 5 should both be sufficient

If there is enough space, it can be done however one wishes. What I’ve seen is 4D at the beginning and 2D afterward

Recently, someone asked whether it is possible to have branch pipes on the straight sections before and after the flow meter First, you need to understand what a straight pipe section is used for ； Actually, it is based on the measurement principle of flow meters: these devices introduce fittings into the pipeline to disrupt the flow of fluid, thereby creating a pressure difference; the flow meter measures this pressure difference in order to determine the flow rate ； So you should now understand that any factor that interferes with fluid flow will affect the accuracy of the flow meter. Leaving a certain amount of straight pipe section at both the front and back is intended to ensure stable flow. You can use 10 units in front and 5 behind, or 5 in front and 3 behind, or even 4 in front and 2 behind – it depends on the specific situation. The petrochemical industry guidelines specify 20 units in front and 10 behind; the purpose is to minimize disturbances and maintain stable flow.

Well, that’s the principle; it seems that the length of the straight sections before and after the flow meter still depends on the specific type of flow meter.

So for design, 10 in the front and 5 at the back is usually sufficient

Check the manufacturer’s sample materials! Or call the manufacturer directly! That’s definitely correct! ! !