How can there still be flow if the flow meter is frozen?
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The weather is cold tonight. At first, the steam flow meter showed a stable reading; then, when the steam control valve was adjusted to its original setting, the steam flow increased. The normal flow rate is 16,000 t/h, but it has now risen to 26,000 t/h. It is suspected that the flow meter has frozen. I went to the site and used steam to heat the flow meter, and the flow rate returned to 16,000 t/h. If the meter is frozen, the flow rate should indicate 0 t/h – so why did it increase?
It depends on the type you’re using. If it’s a differential pressure type that freezes, there will be pressure on both the positive and negative sides, and definitely a flow rate display will be available; it’s just hard to say what the value of that display will be
A flow rate of 16,000 t/h – what size boiler would that require? How thick is the pipe! !
With such a large amount, it expands, and that’s why. . . . Insulation is not properly done
The flow meters for steam will freeze up; the instruments either don’t respond or show the full scale value or 0
If it is because the pressure tap pipe has frozen, the flow rate may increase or decrease.
When the pressure tap pipe freezes, its volume expands, which continuously exerts pressure on the transmitter; over time this can damage the transmitter. In the case of the positive pressure pipe, severe freezing leads to an increased flow rate, while severe freezing of the negative pressure pipe results in a lower flow rate or even a negative value.
You can study the working principles of various instruments, and then you’ll understand it naturally – the type you’re using is for differential pressure measurement, right? When it freezes, ice creates pressure on the transmitter; of course, there’s also flow involved
You’re using a differential pressure flow meter for measurement, right? The pressure guiding tubes have frozen; ice creates pressure on the transmitter, and as a result the flow rate may increase or decrease. The main issue is poor insulation.