Pressure gauge
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I would like to ask everyone: are there any regulatory requirements that prohibit installing two pressure gauges with different measurement ranges on the same pressure pipeline at different locations (for example, 0-1.6 MPa and 0-2.5 MPa)? Thank you.
Normally, pressure gauges with different ranges can be installed on the same pressure pipeline. However, the following points need to be noted: 1. Installation location: When installing, it is necessary to follow relevant specifications, placing pressure gauges with different ranges on the pipeline in order from smallest to largest, which facilitates observation and management. 2. Pressure fluctuations: Since pressure gauges with different ranges are connected to the same pipeline and subjected to the same pressure source, pressure fluctuations in the pipeline can affect pressure gauges of different ranges. If there are large pressure fluctuations in the pipeline, it may cause the pointer of a high-range pressure gauge to oscillate or exceed its range. 3. Select the correct range: In practical use, it is necessary to choose a pressure gauge with an appropriate range to meet the measurement requirements, thereby ensuring its accuracy and stability. In summary, when installing pressure gauges with different ranges, it is necessary to pay attention to the points mentioned above to ensure safe, stable, and accurate measurements. .
You’re welcome; feel free to ask if you have any questions. .
Take a look at the project specification sheet to see the requirements for selecting the pressure gauge and the range of measurement values. 1. In accordance with clause 5.1.3 of GBT 1226-2010 for general pressure gauges, the pressure range of the gauge is generally utilized up to 3/4 of its total measurement range. Therefore, the range of a 1.6 MPa pressure gauge corresponds to 64% of the range of a 2.5 MPa pressure gauge; based on this requirement, a 2.5 MPa pressure gauge cannot be used ； 2. If the range of the pressure gauge is selected to be between 1.5 and 3 times the pressure to be measured, then is 2.5 MPa above the upper limit of measurement? It can be used as long as it doesn’t exceed the limit.
2.5/3=0.83, 1.6/1.5=1.067; the normal pressure can only be between 0.83 and 1.067. If the normal operating pressure is not within this range, it should not meet the selection criteria for pressure gauges.
Citing the original poster’s comments: \"The current situation is that the pressure gauge on the pump outlet pipe shows a pressure range of 0–1.6 MPa, while at the other end (about 800 meters away), the pressure gauge indicates a range of 0–2.5 MPa. Is this acceptable? The normal operating pressure should be 0.6 MPa.\" ” The pump pressure will become lower as it moves further downstream, right? A pressure of 1.6 MPa can be measured; at locations where the pressure is slightly lower downstream, a gauge with a pressure range of 2.5 MPa is used, and its dial has a much smaller indication range. It is recommended to check the outlet pressure and then determine which area on the gauge the pressure value falls in. If the value fluctuates only within a very small range, it may not be easy to discern whether it is low.
The company has now changed the pressure gauge on the device to a range of 0-1.6 MPa. Thank you to all the professionals for sharing their knowledge.
It depends on what the measured pressure is; it is not appropriate to install different pressure gauges on the same pipeline. It’s right to make the change.