Whether the orifice flowmeter can be installed in a vertical pipe

Hello! This is the best gauge manufacturer technology, and the orifice flowmeter can be installed on a vertical pipeline.

However, the orifice flowmeter is mounted on a vertical pipe, and the measuring medium can only flow from the bottom up.

Because the orifice flowmeter belongs to the velocity flowmeter, all the velocity flowmeters need to ensure that the measuring medium is full of pipes, and on the vertical pipe section, only the measuring medium flows from the bottom to the top to ensure that the full pipe can be ensured, which is a prerequisite for accurate measurement, so if it can only be installed vertically, you must pay attention to the flow direction, look!

Yes, the flow direction needs to be from bottom to top.

It can be installed vertically to meet the upstream and downstream straight pipe sections.

1. The straight pipe section before and after the throttle must be straight, and there must be no visible bend.

2. The straight pipe section used for installing throttles should be smooth, if it is not smooth, the flow coefficient should be multiplied by the roughness to correct the sparseness.

3. In order to ensure that the flow of fluid forms a fully developed turbulent velocity distribution in the first 1d of the throttle, and makes this distribution into a uniform axisymmetric shape, the straight pipe section must be round, and the roundness of the first 2d range of the throttle is required to be very strict, and there is a certain roundness index.

4. A long enough straight pipe section is required before and after the throttling piece, and the long enough straight pipe section is related to the form of the local resistance part before the throttle and the diameter ratio.

5, the length of the straight pipe section between the first resistance member and the second resistance member on the upstream side of the throttle can be taken according to the form of the second resistance piece and = regardless of what the actual value is) take 1 2 of the listed value.

6. When the upstream side of the throttle is an open space or a large container with a diameter of 2d, the length of the straight pipe between the open space or the large container and the throttle shall not be less than 30d (15d). If there are other local resistance parts between the throttle and the open space or the large container, the total length of the straight pipe section from the open space to the throttle shall not be less than 30d (15d) in addition to the minimum length of the straight pipe section 1 between the throttle and the local resistance piece.

Product Classification. Since the orifice flowmeter has been applied in the industrial field, its application range has been expanding, and the original product specifications and standards can not better adapt to the development of rapidly changing industrial machinery, so the production researchers of the orifice flowmeter have developed two kinds of orifice flowmeters that can adapt to their needs according to the needs of various industries, mainly including integrated orifice flowmeter and intelligent orifice flowmeter.

The difference between the two is:

1. The integrated orifice flowmeter is a differential pressure generating device for measuring the flow rate, which can measure the flow of various fluids in the pipeline with various differential pressure gauges or differential pressure transmitters, and the throttling device of the orifice flowmeter includes an annular chamber orifice plate, nozzles, etc.

2. The intelligent orifice flowmeter is a new generation of flowmeter that integrates flow, temperature and pressure detection functions, and can automatically compensate for temperature and pressure.

The above content refers to: Encyclopedia - Orifice Plate Flowmeter.

Encyclopedia - Orifice Plate Flow Meter.

1.It depends on whether you're measuring gases, liquids, or vapors. The gas pressure port should preferably be in the upper part of the pipeline; The liquid pressure port should be on the side but not directly below, and the deposited particles will block the pressure port; In the case of steam, the pressure port is on the side of the pipe;

2.Don't make a mistake about the direction of the orifice, the one marked with "+" is positive, the "-" is negative, and the "+" is the direction facing the fluid.

3.The impulse tube drawn from the positive and negative pressure take-off ports should be kept parallel in all cases;

4.The orifice plate is generally used with the differential pressure transmitter, and the positive and negative pressure should not be installed when the impulse tube is connected with the differential pressure transmitter, "H" is positive and "L" is negative;

5.If the gas is measured, the differential pressure device is recommended to be placed above the pipeline, and the liquid is placed at the lower part of the pipeline.

6.Forget the requirements of the straight pipe section, the orifice plate should have a calculation book, you look for it, there is a calculation of the length of the front and rear straight pipe section required when installing the orifice plate, it is best to follow that, if you can't find it, you can install it according to the first 20d after 10d (d refers to the caliber of the orifice plate).

When installing, it should be at least 10d forward and 5d after 5d, D refers to the working diameter of the orifice plate, such as DN500, that is, the inflow direction of the orifice plate is 5000mm, and the outflow direction is 2500mm.

The upstairs is complete and nice!

Read the manual! Pay attention to a six.

Orifice flow complex gauge is the most widely used in the throttling parts, it has simple structure, high precision, low manufacturing cost, mainly two types of standard orifice plate, porous orifice plate, widely used in petroleum, chemical, metallurgy, electric power and other industries, is the most widely used flow meter so far. However, there are some disadvantages, such as large pressure loss, narrow measuring range, and the accuracy of the sensor cannot be guaranteed after wear, and each unit needs a separate calculation book.

How to overcome the above shortcomings and give full play to the advantages of orifice flowmeter?

1.Choose the best mounting point. Ensure that the front and rear straight pipe sections are long enough, and the straight pipe must not have visible bending, so as to ensure that the inner wall is smooth and free of impurities;

2.If the liquid is measured, a filter is installed at the front end to prevent air bubbles from entering;

3.When installing, ensure that the front and rear straight pipe sections are on the same axis line as the instrument guide pipe, the front and rear errors shall not exceed 1°, and the flange gasket shall not be too thick;

4.Maintain the sensor regularly. To prevent the sensor from corrosion, wear and scale, remove it for forced inspection at least once a year to ensure the measurement accuracy.

Of course, the above measures can only be relatively improved, and the narrow measurement range and each unit to calculate the shortcomings formed by the principle and structure of the orifice flowmeter cannot be changed, if the site conditions do not allow, you can consider using other types of flowmeters.

Hello,The United States imported orifice flowmeter manufacturer - Kornke KNKEGlad for your question.

The technical experts of Kornko KNKE in the United States believe that the installation requirements of the orifice flowmeter are as follows:

1. Before installation, check whether the number and size of the throttling device meet the requirements of the pipeline installation location.

2. For the newly installed pipeline system, the orifice plate must be installed after the pipeline is flushed and scanned.

Kornko KNKE orifice plate flowmeter.

3. Note that the installation direction of the orifice plate "+" should be towards the flow beam.

4. The center of the orifice plate should coincide with the center line of the pipeline, and the concentricity error should not exceed the value.

5. When the orifice plate is installed in the pipeline, it should be ensured that its end face is perpendicular to the axis of the pipeline, and the verticality error shall not exceed 1°.

6. The sealing gasket used for clamping the orifice plate (including the ring chamber and the flange, between the ring chamber and the orifice plate) shall not break into the inner wall of the pipeline after clamping.

7. The installation place of the orifice plate must be tight, and no leakage is allowed. Therefore, the installation work must be carried out before the pressure test of the pipeline.

8. The impulse pipe should be laid vertically or obliquely, and its inclination shall not be less than 1:12. Fluids with higher viscosity should also have an increased inclination.

When the transmission distance of the differential pressure signal is greater than 3 meters, the impulse pipe should be tilted in sections, and a gas collector and a settler should be installed at the highest and lowest points respectively.

9. In order to avoid the distortion of differential pressure signal transmission, the positive and negative pressure pipes should be laid as close as possible, and anti-freezing measures should be taken in severe cold areas. Electric heating or vapor insulation can be used, but it is necessary to prevent the overheating vaporization of the measured medium and the generation of gas in the impulse pipe to cause false differential pressure.

10. When the orifice flowmeter is installed on the vertical main pipeline, the position of the pressure port can be arbitrarily selected on the plane of the pressure device. The orifice plate is installed inside the horizontal or inclined main pipe.

11. The pressure impulse pipe is made of pressure-resistant and corrosion-resistant materials according to the nature of the medium to be measured, and its inner diameter shall not be less than 6 mm, and the length shall be preferably within 16 meters.

Summary. How to determine the installation direction of the integrated built-in orifice flowmeter, pro hello 1For different measurement media, generally gas, liquid or steam, the gas pressure port is best in the upper part of the pipeline; The liquid pressure port should be on the side but not directly below, and the deposited particles will block the pressure port; In the case of steam, the pressure port is on the side of the pipe; 2.

Note the direction of the plate, marked with "+" for the positive direction, "-" for the negative direction, and "+ for the direction facing the fluid. 3.The impulse tube drawn from the positive and negative pressure take-off ports should be kept parallel in all cases; 4.

The orifice flowmeter is generally used with the differential pressure transmitter, and the positive and negative pressure should not be installed when the impulse pipe is connected with the differential pressure transmitter, "H" is positive, and "L" is negative; 5.For gas measurement, it is recommended that the differential pressure device be placed above the pipeline, and for liquid, it should be placed at the lower part of the pipeline, and if the steam measurement is equipped with a condensation tank, the condensate tank should be kept at the same level level. 6.

Pay attention to the requirements of the straight pipe section, the orifice plate should have a calculation book, you look for it, there is a calculation of the length of the front and rear straight pipe section required when installing the orifice plate, it is best to follow that, if you can't find it, you can install it according to the first 20d after 10d (d refers to the diameter of the orifice plate).

How to determine the installation direction of the integrated built-in orifice flowmeter, pro hello 1For different measurement media, generally gas, liquid or steam, the gas pressure port is best in the upper part of the pipeline; The liquid pressure port should be on the side but not directly below, and the deposited particles will block the pressure port; In the case of steam, the pressure port is on the side of the pipe; 2.Note the direction of the plate, marked with "+" for the positive direction, "-" for the negative direction, and "+ for the direction facing the fluid.

3.The impulse tube drawn from the positive and negative pressure take-off ports should be kept parallel in all cases; 4.The orifice flowmeter is generally used with the differential pressure transmitter, and the positive and negative pressure should not be installed when the impulse pipe is connected with the differential pressure transmitter, "H" is positive, and "L" is negative; 5.

For gas measurement, it is recommended that the differential pressure device be placed above the pipeline, and for liquid, it should be placed at the lower part of the pipeline, and if the steam measurement is equipped with a condensation tank, the condensate tank should be kept at the same level level. 6.Pay attention to the requirements of the straight pipe section, the orifice plate should have a calculation book, you look for it, there is a calculation of the length of the front and rear straight pipe section required when installing the orifice plate, it is best to follow that, if you can't find it, you can install it according to the first 20d after 10d (d refers to the diameter of the orifice plate).

The small mouth side is positive, the large mouth side is negative, and the inner edge of the orifice plate is angled.