Precautions for installation of impulse pipe of th

2022-08-23
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Precautions for the installation of the impulse pipe of the micro differential pressure transmitter

when used together with the throttling device, when the field pressure is low, it is often encountered in the calculation that the upper limit of the calculated differential pressure is the micro differential pressure, which puts forward high requirements for the field differential pressure transmitter. Now let's introduce how to install correctly:

1. Because of its small range and different installation positions, the pressure of micro differential pressure transmitter changes due to uneven stress. (when the slope is 30 degrees, there will be 0.2kpa pressure on the left after adding a pad and tightening the screw). In this case, especially when it is used together with Annubar flowmeter, it must be noted that some companies have planned to realize the installation of 2,3-bdo commercial differential pressure transmitter in the next 2 (3) years

2. Prevent the transmitter from contacting with corrosive or overheated measured medium

3. Prevent dregs from depositing in the impulse pipe

4. The impulse pipe should be as short as possible

5. The liquid column head in the impulse pipes on both sides should be kept balanced

6. The impulse pipe should be installed where the temperature gradient and temperature fluctuation are small and there is no impact and vibration

methods to minimize errors on site:

a. the impulse pipe should be as short as possible

b. when measuring the liquid steam that is gradually eliminated manually, the impulse pipe should be connected upward to the process pipe, and its slope should not be less than 1/12

c. for gas measurement, the impulse pipe should be connected downward to the process pipe, and its slope should not be less than 1/12

d. avoid high points in the layout of liquid impulse piping and low points in the layout of gas impulse piping

e. the two pressure pipes should maintain the same temperature. New materials are the key industry in Zibo in recent years

f. in order to avoid the influence of friction, the diameter of the impulse pipe should be large enough

g. there should be no gas in the impulse pipe filled with liquid

h. when using isolation liquid, the liquid level of impulse pipes on both sides should be the same.

the correct installation of micro differential pressure transmitter on site is a very important link, and I hope it can provide a reference for field maintenance personnel. (end)

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