What are the requirements for pressure transmitter tubing?

Time: 2024-10-18
Equipment Configuration:pressure transmitter

The pressure transmitter piping is an important component connecting the pressure transmitter and the measured medium.

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Requirements for pressure transmitter piping

The pressure transmitter piping is an important component connecting the pressure transmitter and the measured medium. Proper pipeline design and installation are crucial to ensure that the pressure transmitter can accurately and stably measure pressure signals. This article will delve into the requirements for material, size, length, bending radius, installation method, etc. of the pressure transmitter pipeline in order to provide the best measurement environment for the pressure transmitter.

Pipe material requirements

The material selection of the pressure transmitter pipeline depends on the characteristics of the measured medium, pressure range, temperature range and environmental conditions. Commonly used materials for pressure transmitter piping include the following:

Stainless steel: It has strong corrosion resistance and good oxidation resistance, and is suitable for most applications. Hastelloy: Very corrosion-resistant and suitable for extremely corrosive environments. Copper alloy: good corrosion resistance, but easy to oxidize, suitable for general industrial applications. Titanium alloy: light weight, high strength, good corrosion resistance, suitable for high temperature and high pressure environments. Polytetrafluoroethylene (PTFE): Corrosion resistant, suitable for the chemical industry and semiconductor industry. Pipe size requirements

The size of the pressure transmitter pipe should be determined based on the flow rate, pressure range and fluid characteristics of the measured medium. If the inner diameter of the pipeline is too small, it will increase the fluid resistance, lead to pressure drop, and affect the measurement accuracy. If the inner diameter of the pipeline is too large, the volume of the pipeline will increase, resulting in slower response time. In general, the inner diameter of the pipeline should be 1 to 2 levels larger than the inner diameter of the pressure transmitter connection port.

Pipeline length requirements

The length of the pressure transmitter pipeline should be determined based on the actual installation conditions and measurement requirements. Excessively long pipelines will increase fluid resistance and reduce measurement response speed. A pipeline that is too short may cause pressure wave reflection and affect measurement stability. Under normal circumstances, the length of the pipeline should be as short as possible, but it should not be less than 1 to 2 times the inner diameter of the pipeline.

Pipeline bending radius requirements

Pressure transmitter pipelines sometimes need to be bent. A bend radius that is too small can create fluid turbulence, leading to pressure losses and measurement errors. Under normal circumstances, the bending radius of the pipeline should be no less than 5 times the outer diameter of the pipeline. For small-diameter pipelines, the bending radius can be appropriately reduced, but shall not be less than 2 times the outer diameter of the pipeline.

Pipeline installation methods

There are two main ways to install the pressure transmitter pipeline:

Direct installation: directly connect the pressure transmitter onto the medium being measured. This method is easy to install, but it is intrusive to the medium being measured and is not suitable for situations with high pressure or corrosive media. Isolation diaphragm installation: Install an isolation diaphragm between the pressure transmitter and the measured medium. This method can protect the pressure transmitter from corrosion and damage of the measured medium, and is suitable for high pressure, corrosive media or occasions where the measured medium needs to be isolated. Practices

Here are some practices for installing pressure transmitter tubing:

Avoid sharp bends and dead ends to prevent fluid turbulence and pressure fluctuations. Pipelines should be kept away from heat and vibration sources to ensureQuantitative stability. Pipe connections should be properly sealed to prevent leakage. Pipelines should be firmly fixed to prevent vibration and displacement. Check pipelines regularly to detect and deal with leaks, blockages and other abnormalities in a timely manner. Conclusion

The reasonable design and installation of the pressure transmitter pipeline is crucial to ensure accurate and stable measurement of the pressure transmitter. By following the requirements presented in this article, you can provide a measurement environment for pressure transmitters that improves measurement accuracy, stability, and response speed. If you have any questions or need technical support regarding pressure transmitter piping, please contact experts in the relevant field for more detailed guidance and assistance.

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