Flowmeters are the most important and commonly used instrumentation products in industrial production. Measurements with corrosive liquids are often encountered in production. In the measurement of corrosive liquids, special attention should be paid to the anticorrosion problem of the flowmeter itself. If the flowmeter is used in If you don't pay attention to it before and after, it is likely to be corroded, resulting in bad consequences, mainly in the following aspects.
1: The key components of the flow measuring instrument are corroded by the corrosive medium for a long time and change the geometric size, resulting in a decrease in the accuracy of the instrument.
For example: For example, the vortex generator in the vortex flowmeter is corroded by the fluid, resulting in a reduction in the width size, and the surface of the upstream surface becomes rough, thereby causing a change in the flow coefficient. Even the plug-in flowmeter that is less affected by the corrosive medium is often due to the pits and pits on the inner wall of the metal tube corroded by the medium, which weakens the transmitting and receiving signals, and loses sensitivity in severe cases.
2: Corrosive medium will corrode the key parts of the flow measuring instrument in direct contact with the medium, resulting in its damage and even loss of its function. For example, the electrode of the electromagnetic flowmeter causes the medium to leak out due to corrosion, resulting in the burning of the outer ring of the excitation line.
3: Corrosion will have a considerable impact on the life of the instrument. If it is not paid attention to, it will cause some measuring instruments to lose their functions prematurely. For example, in some special occasions, the cost of using all anti-corrosion materials is too high, so the key measurement components are made of anti-corrosion materials, and the process connections, such as flanges, are generally made of anti-corrosion or non-corrosion materials, and the process connections are worn out after a few years of use.
4: Corrosive media will reduce the safety protection capability of instruments and meters, and even cause serious safety accidents.
If the leakage of corrosive medium is not detected and dealt with in time, it is easy to cause safety and personal accidents. Therefore, in order to ensure the accuracy of its measurement, it should be regularly maintained and should not be taken lightly.
The above are some factors of on-site flowmeter corrosion. For the anti-corrosion problem of flowmeter products, due to the wide variety of production sites, the impact is not the same. Therefore, it is necessary for users to take the maintenance of instruments and meters as a daily necessity. Only in this way, the instruments can maximize their functions.
