What are the problems that need to be paid attention to when measuring steam temperature and pressure compensation with orifice plate flowmeter
Orifice flowmeters are known as “universal” meters in the industry, and are very popular with users in the application process. Today, we mainly talk about what problems need attention when the orifice flowmeter encounters temperature and pressure compensation in the process of measuring steam.
1. In the process of temperature and pressure compensation for steam, the general temperature and pressure compensation method is relatively simple, and there may be a large error. Especially the superheated steam that does not meet the ideal gas state, or the high-temperature and high-pressure state and the steam flow measurement accuracy requirements are relatively high occasions, it is necessary to have an accurate algorithm to ensure the accuracy of the data.
2, it is very important to choose the appropriate temperature and pressure compensation algorithm, which needs to meet the operating interval of the steam, pay attention to the corresponding restriction conditions of the compensation algorithm, the correct selection and use of temperature, pressure and other units, and the compensation results should meet the requirements of the steam density table.
3, the temperature and pressure compensation should be based on the actual situation, the selection and installation position of the orifice flowmeter should be reasonable, and the flow correction should be carried out before operation. The measurement value of the temperature and pressure transmitter should be accurate, which is the premise of temperature and pressure compensation, otherwise the result of temperature and pressure compensation will be greatly affected.
4. This paper only discusses the temperature and pressure compensation method of orifice flowmeter measurement. For the temperature and pressure compensation method of other types of instruments, it is necessary to combine the instrument detection principle and analyze specific problems.
